/* ==========================================================================
   DESIGN SYSTEM & MODERN RESET
   ========================================================================== */

/* Define Cascade Layers */
@layer reset, base, theme, components, utilities;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
  }

  body {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  img, svg {
    display: block;
    max-width: 100%;
    height: auto;
  }

  input, button, textarea, select {
    font: inherit;
    color: inherit;
    background: transparent;
    border: none;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

  ul, ol {
    list-style: none;
  }
}

/* ==========================================================================
   THEME VARIABLES (LIGHT & DARK MODES)
   ========================================================================== */

@layer theme {
  :root {
    /* Fonts */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Light Theme Color Tokens - Maroon & White */
    --hue-primary: 350; /* Maroon Hue */
    --hue-accent: 355;  /* Crimson Hue */
    
    --bg-primary: hsl(0, 0%, 100%); /* Clean White */
    --bg-surface: rgba(255, 255, 255, 0.85);
    --bg-card: rgba(255, 255, 255, 0.8);
    --border-color: rgba(128, 0, 32, 0.08); /* Subtle maroon border */
    
    --text-primary: hsl(350, 70%, 12%); /* Dark Maroon Text */
    --text-secondary: hsl(350, 15%, 35%); /* Soft Muted Maroon Text */
    --text-muted: hsl(350, 10%, 55%);
    
    --accent-solid: hsl(var(--hue-primary), 75%, 28%); /* True Maroon */
    --accent-gradient: linear-gradient(135deg, hsl(350, 75%, 28%), hsl(355, 80%, 45%)); /* Deep Maroon to Crimson */
    --accent-glow: rgba(128, 0, 32, 0.08);
    
    --shadow-sm: 0 2px 8px -1px rgba(128, 0, 32, 0.04);
    --shadow-md: 0 10px 25px -5px rgba(128, 0, 32, 0.05), 0 8px 16px -6px rgba(128, 0, 32, 0.03);
    --shadow-lg: 0 20px 40px -10px rgba(128, 0, 32, 0.08);
    
    --ambient-1: rgba(128, 0, 32, 0.08);
    --ambient-2: rgba(220, 20, 60, 0.08);
    
    --success-bg: rgba(16, 185, 129, 0.1);
    --success-text: hsl(150, 84%, 25%);
 
    --color-scheme: light;
  }
 
  [data-theme="dark"] {
    /* Dark Theme Color Tokens - Deep Maroon & White */
    --bg-primary: hsl(350, 40%, 6%); /* Deep Maroon Black background */
    --bg-surface: rgba(40, 5, 10, 0.7);
    --bg-card: rgba(50, 8, 15, 0.5);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-primary: hsl(0, 0%, 100%); /* Clean White Text */
    --text-secondary: hsl(350, 15%, 82%); /* Soft Muted Maroon White */
    --text-muted: hsl(350, 10%, 62%);
    
    --accent-solid: hsl(var(--hue-primary), 85%, 65%);
    --accent-gradient: linear-gradient(135deg, hsl(350, 85%, 60%), hsl(355, 90%, 75%));
    --accent-glow: rgba(255, 100, 120, 0.2);
    
    --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 16px -6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.7);
    
    --ambient-1: rgba(128, 0, 32, 0.15);
    --ambient-2: rgba(220, 20, 60, 0.15);
    
    --success-bg: rgba(16, 185, 129, 0.15);
    --success-text: hsl(150, 84%, 45%);

    --color-scheme: dark;
  }
}

/* ==========================================================================
   BASE STYLES
   ========================================================================== */

@layer base {
  body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    position: relative;
  }

  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.25;
  }

  h1 {
    font-size: clamp(2.5rem, 1rem + 5vw, 4rem);
  }

  h2 {
    font-size: clamp(1.8rem, 1rem + 3vw, 2.6rem);
  }

  h3 {
    font-size: clamp(1.4rem, 0.8rem + 2vw, 1.8rem);
  }

  p {
    font-size: 1rem;
  }

  /* Utility Container */
  .container {
    width: 100%;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: 1.5rem;
  }

  /* Ambient Glow Blobs */
  .ambient-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    pointer-events: none;
    transition: background 0.5s ease;
  }

  .glow-1 {
    top: -10%;
    left: -10%;
    width: 40vw;
    height: 40vw;
    background: var(--ambient-1);
  }

  .glow-2 {
    bottom: -10%;
    right: -10%;
    width: 40vw;
    height: 40vw;
    background: var(--ambient-2);
  }

  /* Focus rings according to accessibility standards */
  :focus-visible {
    outline: 2px solid var(--accent-solid);
    outline-offset: 4px;
  }

  button, input, textarea, select {
    outline: none;
  }
}

/* ==========================================================================
   COMPONENTS - STICKY HEADER & NAV
   ========================================================================== */

@layer components {
  .main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.4s ease, border-color 0.4s ease;
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin-inline: auto;
    padding: 1.25rem 1.5rem;
  }

  .logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    transition: transform 0.2s ease;
  }

  .logo-accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .logo:hover {
    transform: translateY(-1px);
  }

  .nav-menu {
    display: flex;
    gap: 2rem;
  }

  .nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding-block: 0.25rem;
    font-size: 0.95rem;
    transition: color 0.3s ease;
  }

  .nav-link:hover {
    color: var(--text-primary);
  }

  /* Smooth slider underline indicator */
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-link.active {
    color: var(--text-primary);
    font-weight: 600;
  }

  .nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 1.2rem;
  }

  /* Theme Switcher Button */
  .theme-toggle {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    color: var(--text-secondary);
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--border-color);
  }

  .theme-toggle:hover {
    color: var(--text-primary);
    background-color: rgba(0, 0, 0, 0.05);
    transform: rotate(15deg);
  }

  [data-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.08);
  }

  .theme-toggle svg {
    width: 1.25rem;
    height: 1.25rem;
  }

  .theme-toggle .moon-icon {
    display: none;
  }

  [data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
  }

  [data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
  }

  /* Hamburger Menu Toggle (Mobile) */
  .menu-toggle-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 101;
    padding: 0.4rem;
  }

  .menu-toggle-btn .bar {
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 4px;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
}

/* ==========================================================================
   HERO SECTION DESIGN
   ========================================================================== */

@layer components {
  .hero-section {
    padding-top: 9rem;
    padding-bottom: 5rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
  }

  .badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background-color: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    text-transform: uppercase;
    margin-bottom: 1.5rem;
  }

  .hero-name {
    font-size: clamp(2.8rem, 1.2rem + 5vw, 4rem);
    font-weight: 800;
    color: var(--accent-solid);
    margin-bottom: 0.5rem;
    letter-spacing: -1.5px;
    line-height: 1.1;
  }

  .hero-affiliation {
    font-size: clamp(1.15rem, 0.95rem + 1vw, 1.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2.5rem;
    line-height: 1.45;
  }

  .institution-bold {
    font-weight: 850;
    color: var(--text-secondary);
  }

  .hero-tagline {
    font-size: clamp(1.4rem, 0.8rem + 2vw, 2.2rem);
    font-weight: 700;
    margin-bottom: 1.2rem;
    line-height: 1.25;
    letter-spacing: -0.5px;
    color: var(--text-primary);
  }

  .text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-description {
    font-size: clamp(1.05rem, 1rem + 0.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 620px;
  }

  .hero-buttons {
    display: flex;
    gap: 1.2rem;
    margin-bottom: 3.5rem;
  }

  /* Premium Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 2.2rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease, background 0.3s ease;
  }

  .btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 15px -3px var(--accent-glow);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -5px var(--accent-glow);
  }

  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-secondary {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
  }

  .btn-secondary:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
  }

  /* Stats grid */
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
  }

  .stat-card {
    display: flex;
    flex-direction: column;
  }

  .stat-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.4rem;
  }

  .stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
  }

  /* Hero Avatar Frame & Decor */
  .hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
  }

  .avatar-container {
    position: relative;
    width: 320px;
    height: 320px;
    z-index: 1;
  }

  .avatar-frame {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    border: 6px solid var(--bg-card);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, hsl(230, 20%, 90%), hsl(230, 20%, 75%));
    display: flex;
    align-items: center;
    justify-content: center;
  }

  [data-theme="dark"] .avatar-frame {
    border-color: var(--bg-card);
    background: linear-gradient(135deg, hsl(220, 20%, 20%), hsl(220, 20%, 15%));
  }

  .profile-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .avatar-container:hover .profile-avatar {
    transform: scale(1.05);
  }

  /* Floating decoration rings */
  .decoration-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px dashed var(--accent-solid);
    opacity: 0.3;
    z-index: -1;
    pointer-events: none;
  }

  .decoration-circle.d-1 {
    top: -20px;
    left: -20px;
    width: calc(100% + 40px);
    height: calc(100% + 40px);
    animation: rotateCircle 35s linear infinite;
  }

  .decoration-circle.d-2 {
    top: -40px;
    left: -40px;
    width: calc(100% + 80px);
    height: calc(100% + 80px);
    animation: rotateCircleReverse 50s linear infinite;
  }

  .design-tool-floating {
    position: absolute;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    padding: 0.75rem;
    box-shadow: var(--shadow-md);
    color: var(--accent-solid);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
  }

  .design-tool-floating.floating-1 {
    top: 10%;
    left: -5%;
    animation: floatAnim 6s ease-in-out infinite;
  }

  .design-tool-floating.floating-2 {
    bottom: 15%;
    right: -5%;
    animation: floatAnim 8s ease-in-out infinite 1s;
  }

  .hero-socials {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 2.5rem;
  }

  .social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.2s ease, border-color 0.2s ease;
  }

  .social-link:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
    border-color: var(--accent-solid);
  }

  .social-icon {
    width: 16px;
    height: 16px;
    color: var(--accent-solid);
  }

  /* Contact socials styling */
  .contact-social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: background-color 0.2s ease, transform 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  }

  .contact-social-btn:hover {
    background-color: var(--accent-solid);
    color: #ffffff;
    border-color: var(--accent-solid);
    transform: translateY(-2px);
  }
}


/* ==========================================================================
   ABOUT & TIMELINE DESIGN
   ========================================================================== */

@layer components {
  .about-section {
    padding-block: 5rem;
    position: relative;
  }

  .section-header {
    text-align: center;
    margin-bottom: 3.5rem;
  }

  .section-subtitle {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent-solid);
    margin-bottom: 0.5rem;
  }

  .section-title {
    letter-spacing: -0.5px;
    margin-bottom: 1rem;
  }

  .divider {
    width: 60px;
    height: 3px;
    background: var(--accent-gradient);
    margin-inline: auto;
    border-radius: 4px;
  }

  .about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }

  .glass-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.2rem;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background-color 0.4s ease, border-color 0.4s ease, transform 0.3s ease, box-shadow 0.3s ease;
  }

  .bio-narrative {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .card-heading-large {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  .card-heading-large::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent-solid);
  }

  .bio-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
  }

  .skills-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.2rem;
  }

  .chip {
    display: inline-block;
    padding: 0.4rem 0.85rem;
    background-color: var(--border-color);
    border-radius: 5px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: background-color 0.2s ease, transform 0.2s ease;
  }

  .chip:hover {
    background-color: var(--accent-solid);
    color: #ffffff;
    transform: translateY(-1px);
  }

  /* Dotted Timeline vertical layout */
  .academic-timeline {
    padding-left: 1rem;
  }

  .timeline-title {
    font-size: 1.5rem;
    margin-bottom: 1.8rem;
  }

  .timeline {
    position: relative;
    border-left: 2px dashed var(--border-color);
    padding-left: 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 2.2rem;
  }

  .timeline-item {
    position: relative;
  }

  .timeline-marker {
    position: absolute;
    left: calc(-1.8rem - 6px);
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-solid);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--border-color);
    transition: transform 0.3s ease;
  }

  .timeline-item:hover .timeline-marker {
    transform: scale(1.3);
  }

  .timeline-content {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
  }

  .timeline-date {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-solid);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .timeline-content h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
  }

  .timeline-institution {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
  }

  .timeline-detail {
    font-size: 0.88rem;
    color: var(--text-muted);
  }
}

/* ==========================================================================
   RESEARCH & AWARDS DESIGN
   ========================================================================== */

@layer components {
  .research-section {
    padding-block: 5rem;
  }

  .research-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }

  .column-heading {
    font-size: 1.5rem;
    margin-bottom: 1.8rem;
    border-left: 3px solid var(--accent-solid);
    padding-left: 0.75rem;
  }

  /* Paper cards with dynamic interactive hover */
  .papers-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .paper-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.5rem;
    align-items: start;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease, border-color 0.3s ease;
  }

  .paper-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-solid);
    background-color: var(--bg-surface);
  }

  .paper-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
  }

  .paper-info {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }

  .paper-tag {
    align-self: start;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-solid);
  }

  .paper-info h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
  }

  .paper-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
  }

  .paper-summary {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
  }

  /* Award cards vertical list */
  .awards-column {
    display: flex;
    flex-direction: column;
  }

  .awards-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .award-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.5rem;
    align-items: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
  }

  .award-card:hover {
    transform: translateX(4px);
    border-color: var(--accent-solid);
  }

  .award-badge-container {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--border-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--text-primary);
    font-size: 0.9rem;
  }

  .award-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
  }

  .award-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
  }
}

/* ==========================================================================
   UPDEM INTERACTIVE TOOL DESIGN
   ========================================================================== */

@layer components {
  .updem-section {
    padding-block: 5rem;
    position: relative;
  }

  .updem-intro {
    max-width: 800px;
    margin-inline: auto;
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
  }

  .updem-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2.5rem;
    align-items: start;
  }

  .card-heading {
    font-size: 1.25rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
  }

  .panel-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
  }

  /* Sliders weight custom designs */
  .weights-slider-group {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-bottom: 1.5rem;
  }

  .slider-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .slider-label-val {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
  }

  .weight-percent {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--accent-solid);
  }

  /* Range styling */
  .slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background-color: var(--border-color);
    outline: none;
    transition: background-color 0.2s ease;
  }

  .slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease;
  }

  .slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
  }

  .slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    border: none;
    transition: transform 0.1s ease;
  }

  .slider::-moz-range-thumb:hover {
    transform: scale(1.2);
  }

  /* Scores grid setup */
  .categories-container {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
  }

  .grid-row-header, .grid-row-data {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 1rem;
    align-items: center;
    text-align: center;
  }

  .grid-row-header {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
  }

  .grid-row-header span:first-child, .grid-row-data span:first-child {
    text-align: left;
  }

  .cat-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: help;
    border-bottom: 1px dashed var(--text-muted);
    align-self: start;
    padding-bottom: 1px;
    display: inline-block;
  }

  .score-input {
    width: 100%;
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-weight: 600;
    text-align: center;
    font-size: 0.9rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .score-input:focus {
    border-color: var(--accent-solid);
    box-shadow: 0 0 0 3px var(--accent-glow);
  }

  /* Results gauge panel */
  .updem-panel-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: space-between;
    gap: 2rem;
  }

  .results-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    width: 100%;
    margin-block: 1rem;
  }

  /* Concentric Gauge */
  .index-score-circle {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--bg-card) 60%, transparent 61%), conic-gradient(var(--accent-solid) 0%, var(--border-color) 0%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md), inset 0 0 10px rgba(0, 0, 0, 0.05);
    position: relative;
    transition: background 0.4s ease;
  }

  .u-value-lbl {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
  }

  .u-value-num {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
  }

  /* Progress linear tracker fallback */
  .progress-bar-container {
    width: 80%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
  }

  .progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .rating-badge-container {
    display: flex;
    justify-content: center;
  }

  .status-badge {
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    text-align: center;
    background-color: var(--border-color);
    color: var(--text-secondary);
    transition: all 0.3s ease;
  }

  .status-badge.high {
    background-color: var(--success-bg);
    color: var(--success-text);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.15);
  }

  .status-badge.medium {
    background-color: rgba(245, 158, 11, 0.1);
    color: hsl(35, 92%, 35%);
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.15);
  }

  [data-theme="dark"] .status-badge.medium {
    color: hsl(35, 92%, 55%);
  }

  .status-badge.low {
    background-color: rgba(239, 68, 68, 0.1);
    color: hsl(0, 84%, 40%);
  }

  [data-theme="dark"] .status-badge.low {
    color: hsl(0, 84%, 60%);
  }

  .interpretation-box {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    width: 100%;
    font-size: 0.92rem;
  }

  .interpretation-box h4 {
    font-size: 1rem;
    margin-bottom: 0.4rem;
  }

  /* Math details */
  .math-reference {
    border-top: 1px solid var(--border-color);
    padding-top: 1.2rem;
    width: 100%;
  }

  .math-reference h5 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
  }

  .math-code {
    display: block;
    background-color: var(--bg-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.88rem;
    color: var(--accent-solid);
    font-weight: 700;
    margin-bottom: 0.4rem;
    text-align: center;
  }

  .math-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
  }
}

/* ==========================================================================
   CONTACT SECTION DESIGN
   ========================================================================== */

@layer components {
  .contact-section {
    padding-block: 5rem;
  }

  .contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
  }

  .contact-lead-text {
    font-size: 1.05rem;
    margin-bottom: 2rem;
  }

  .contact-list {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
  }

  .contact-list li {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
  }

  .contact-icon {
    padding: 0.8rem;
    border-radius: 8px;
    background-color: var(--border-color);
    color: var(--accent-solid);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .contact-list strong {
    display: block;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
  }

  .contact-list p {
    font-size: 0.95rem;
    line-height: 1.5;
  }

  .email-link {
    color: var(--accent-solid);
    font-weight: 600;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
  }

  .email-link:hover {
    border-color: var(--accent-solid);
  }

  /* Form layouts */
  .contact-form-panel form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .form-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
  }

  .form-group input, .form-group textarea, .custom-select {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .form-group input:focus, .form-group textarea:focus, .custom-select:focus {
    border-color: var(--accent-solid);
    box-shadow: 0 0 0 3px var(--accent-glow);
  }

  /* Select customization */
  .custom-select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
    cursor: pointer;
  }

  [data-theme="dark"] .custom-select {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  }

  /* Validation UI invalid configurations */
  .form-group input:invalid:not(:placeholder-shown), 
  .form-group textarea:invalid:not(:placeholder-shown) {
    border-color: hsl(0, 84%, 60%);
  }

  .error-msg {
    display: none;
    font-size: 0.75rem;
    color: hsl(0, 84%, 55%);
    font-weight: 500;
  }

  .form-group.has-error .error-msg {
    display: block;
    margin-top: 0.2rem;
  }

  .form-group.has-error input, .form-group.has-error textarea {
    border-color: hsl(0, 84%, 55%) !important;
  }

  /* Simulated response box */
  .success-alert {
    margin-top: 1.25rem;
    display: flex;
    align-items: center;
    padding: 0.88rem 1.25rem;
    border-radius: 8px;
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid rgba(16, 185, 129, 0.2);
    font-size: 0.95rem;
    font-weight: 500;
    animation: slideDown 0.3s ease-out forwards;
  }
}

/* ==========================================================================
   FOOTER DESIGN
   ========================================================================== */

@layer components {
  .main-footer {
    border-top: 1px solid var(--border-color);
    padding-block: 2.5rem;
    background-color: var(--bg-surface);
    backdrop-filter: blur(12px);
    transition: background-color 0.4s ease, border-color 0.4s ease;
    margin-top: 4rem;
  }

  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
  }

  .footer-subtext {
    font-size: 0.8rem;
    color: var(--text-muted);
  }
}

/* ==========================================================================
   KEYFRAME ANIMATIONS
   ========================================================================== */

@keyframes floatAnim {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes rotateCircle {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes rotateCircleReverse {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   MEDIA QUERIES (RESPONSIVENESS)
   ========================================================================== */

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .badge {
    margin-inline: auto;
  }

  .hero-description {
    margin-inline: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    max-width: 500px;
    margin-inline: auto;
  }

  .hero-visual {
    order: -1;
  }

  .about-grid, .research-grid, .updem-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .updem-panel-results {
    align-items: center;
    gap: 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .menu-toggle-btn {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 260px;
    height: 100vh;
    background-color: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    padding: 6rem 2rem 2rem;
    gap: 1.8rem;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  /* Hamburger transform when menu open */
  .menu-toggle-btn.open .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle-btn.open .bar:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle-btn.open .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Reduced Motion Configuration */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-delay: 0s !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
  .decoration-circle, .design-tool-floating {
    animation: none !important;
  }
}

/* ==========================================================================
   ADMIN PORTAL STYLES
   ========================================================================== */

.admin-body {
  background-color: var(--bg-primary);
  min-height: 100vh;
}

/* 1. Passcode Gateway Overlay */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-card {
  width: 90%;
  max-width: 420px;
  padding: 3rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.login-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* 2. Admin Dashboard Layout */
.admin-dashboard-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 1.5rem;
  gap: 1.5rem;
  max-width: 1400px;
  margin-inline: auto;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 1.2rem 2rem;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.admin-header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.admin-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-solid);
  background-color: var(--border-color);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  letter-spacing: 0.5px;
}

.admin-header-right {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.admin-main {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  flex: 1;
}

.admin-sidebar {
  padding: 1.5rem;
  height: fit-content;
  position: sticky;
  top: 1.5rem;
}

.admin-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.admin-nav-tab {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.9rem 1.25rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.admin-nav-tab svg {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.admin-nav-tab:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.admin-nav-tab:hover svg {
  color: var(--accent-solid);
}

.admin-nav-tab.active {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px -3px var(--accent-glow);
}

.admin-nav-tab.active svg {
  color: #ffffff;
}

/* 3. Panel Container & View logic */
.admin-content {
  padding: 3rem;
  min-height: 600px;
}

.admin-panel {
  display: none;
  animation: slideDown 0.3s ease-out forwards;
}

.admin-panel.active {
  display: block;
}

.panel-title {
  font-size: 1.6rem;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}

.panel-subtitle {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 1.2rem;
}

.form-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
}

/* 4. Admin Forms */
.admin-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skills-entry-wrapper {
  display: flex;
  gap: 1rem;
}

/* Delete Skill Icon */
.chip-delete {
  margin-left: 0.5rem;
  cursor: pointer;
  font-weight: bold;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

.chip-delete:hover {
  opacity: 1;
}

/* 5. Admin Tables */
.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.admin-table th, .admin-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background-color: var(--border-color);
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background-color: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .admin-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.01);
}

.action-btns-cell {
  display: flex;
  gap: 0.5rem;
}

.btn-mini {
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: all 0.2s ease;
}

.btn-edit {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--accent-solid);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.btn-edit:hover {
  background-color: var(--accent-solid);
  color: #ffffff;
}

.btn-delete {
  background-color: rgba(239, 68, 68, 0.1);
  color: hsl(0, 84%, 55%);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-delete:hover {
  background-color: hsl(0, 84%, 55%);
  color: #ffffff;
}

/* 6. Uploader layout */
.image-uploader-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.upload-dropzone {
  border: 2.5px dashed var(--border-color);
  border-radius: 12px;
  padding: 4rem 2rem;
  text-align: center;
  cursor: pointer;
  background-color: var(--bg-primary);
  transition: border-color 0.3s ease, background-color 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
  border-color: var(--accent-solid);
  background-color: rgba(99, 102, 241, 0.03);
}

.upload-cloud-icon {
  color: var(--text-muted);
  transition: color 0.3s ease, transform 0.3s ease;
}

.upload-dropzone:hover .upload-cloud-icon {
  color: var(--accent-solid);
  transform: translateY(-4px);
}

.upload-text {
  font-size: 1rem;
  color: var(--text-secondary);
}

.upload-text strong {
  color: var(--accent-solid);
}

.upload-limit {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.upload-preview-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.preview-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 1.5rem;
}

.avatar-preview-frame {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--bg-card);
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, hsl(230, 20%, 90%), hsl(230, 20%, 75%));
}

[data-theme="dark"] .avatar-preview-frame {
  border-color: var(--bg-card);
  background: linear-gradient(135deg, hsl(220, 20%, 20%), hsl(220, 20%, 15%));
}

/* 6b. Interactive Image Cropper canvas elements */
.cropper-canvas-wrapper {
  position: relative;
  width: 300px;
  height: 300px;
  border-radius: 8px;
  border: 2px solid var(--border-color);
  overflow: hidden;
  background: var(--bg-card);
  cursor: move;
  touch-action: none;
  box-shadow: var(--shadow-md);
}

.crop-mask-circle {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(circle, transparent 99px, rgba(0, 0, 0, 0.5) 100px);
  border-radius: 8px;
}

.crop-outline-circle {
  position: absolute;
  top: 50px;
  left: 50px;
  width: 200px;
  height: 200px;
  pointer-events: none;
  border: 2px dashed var(--accent-solid);
  border-radius: 50%;
}

/* 7. Toast Alerts */
.admin-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  z-index: 1100;
  font-weight: 600;
  font-size: 0.95rem;
  animation: slideDown 0.3s ease-out forwards;
}

[data-theme="dark"] .admin-toast {
  background-color: var(--text-primary);
  color: var(--bg-primary);
}

/* Response controls for responsive mobile admin */
@media (max-width: 768px) {
  .admin-main {
    grid-template-columns: 1fr;
  }
  
  .admin-sidebar {
    position: relative;
    top: 0;
  }
  
  .admin-nav {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
  
  .admin-nav-tab {
    white-space: nowrap;
    width: auto;
  }
  
  .admin-content {
    padding: 1.5rem;
  }

  .image-uploader-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ==========================================================================
   8. ACADEMICS & MENTORSHIP SECTION DESIGN
   ========================================================================== */

.academics-section {
  padding-block: 5rem;
  background-color: var(--bg-primary);
  position: relative;
}

/* Horizontal Sub-Tabs Container */
.sub-tabs-container {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  padding: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  max-width: fit-content;
  margin-inline: auto;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.sub-tab-btn {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.8rem 1.6rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sub-tab-btn:hover {
  color: var(--text-primary);
  background-color: var(--border-color);
}

.sub-tab-btn.active {
  color: #fff;
  background: var(--accent-gradient);
  box-shadow: var(--shadow-md);
}

/* Sub-panels display controls */
.sub-panel {
  display: none;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.sub-panel.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Courses Grid & Cards */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.course-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-solid);
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.course-card:hover::before {
  opacity: 1;
}

.course-badge {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-solid);
  background-color: var(--accent-glow);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  margin-bottom: 1.25rem;
}

.course-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.course-focus {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Supervision Panel Details */
.supervision-container {
  max-width: 100%;
}

.panel-inner-heading {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  text-align: center;
}

.thesis-title-cell {
  font-style: italic;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
}

/* Badges/Tags for Table status & programs */
.degree-tag, .status-tag {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 4px;
  text-align: center;
}

.degree-tag {
  background-color: rgba(99, 102, 241, 0.1);
  color: hsl(238, 75%, 55%);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

[data-theme="dark"] .degree-tag {
  background-color: rgba(129, 140, 248, 0.15);
  color: hsl(238, 85%, 70%);
}

.status-tag {
  background-color: rgba(16, 185, 129, 0.1);
  color: hsl(150, 84%, 25%);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

[data-theme="dark"] .status-tag {
  background-color: rgba(16, 185, 129, 0.15);
  color: hsl(150, 84%, 45%);
}

/* Projects Gallery Grid */
.projects-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2.5rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project-img-wrapper {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  position: relative;
  background-color: hsl(230, 20%, 92%);
  border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .project-img-wrapper {
  background-color: hsl(224, 25%, 12%);
}

.project-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover .project-img-wrapper img {
  transform: scale(1.06);
}

.project-info {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-info .project-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.project-role-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  background-color: var(--border-color);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 1.25rem;
}

.project-desc {
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Responsive Customizations */
@media (max-width: 600px) {
  .sub-tabs-container {
    flex-direction: column;
    border-radius: 12px;
    width: 100%;
    gap: 0.25rem;
  }
  .sub-tab-btn {
    width: 100%;
    padding: 0.6rem 1.2rem;
  }
  .projects-gallery {
    grid-template-columns: 1fr;
  }
}

/* Homepage Journey Timeline Switcher (Education vs Experience) */
.timeline-tabs-container {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.timeline-tab-btn {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  position: relative;
  transition: color 0.3s ease;
}

.timeline-tab-btn:hover {
  color: var(--text-primary);
}

.timeline-tab-btn::after {
  content: '';
  position: absolute;
  bottom: -0.65rem;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-tab-btn.active {
  color: var(--text-primary);
}

.timeline-tab-btn.active::after {
  transform: scaleX(1);
}

.timeline-panel {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.timeline-panel.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}