/* ========================================
   MODERN ACADEMIC WEBSITE STYLES
   Two-accent color system: Green + Coral
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ========== COLOR THEMES ========== */

/* Dark Mode (default) */
:root[data-theme="dark"] {
    --color-bg: #1a1f2e;
    --color-surface: #232936;
    --color-surface-elevated: #2d3548;
    --color-text-primary: #e6edf3;
    --color-text-secondary: #9ca3af;

    /* Dual accent colors */
    --color-accent-primary: #10b981;      /* Emerald green */
    --color-accent-secondary: #d97706;    /* ✔ UPDATED: Muted amber for dark mode */

    --color-border: #374151;
    --color-highlight-primary: rgba(16, 185, 129, 0.1);
    --color-highlight-secondary: rgba(217, 119, 6, 0.12); /* ✔ UPDATED */
}

/* Light Mode */
:root[data-theme="light"] {
    --color-bg: #f9fafb;
    --color-surface: #ffffff;
    --color-surface-elevated: #f3f4f6;
    --color-text-primary: #111827;
    --color-text-secondary: #6b7280;
    
    /* Dual accent colors */
    --color-accent-primary: #059669;      /* Forest green */
    --color-accent-secondary: #ea580c;    /* Vibrant coral */
    
    --color-border: #e5e7eb;
    --color-highlight-primary: rgba(5, 150, 105, 0.1);
    --color-highlight-secondary: rgba(234, 88, 12, 0.1);
}

:root {
    --font-body: 'Epilogue', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition-speed: 0.3s;
}
/* Default (light) theme values */
/* ===========================
   Icon colors per theme
   =========================== */

/* LIGHT THEME (default) */
:root {
    /* Icon foreground (glyph) */
    --icon-fg: #ff7a00;           /* <-- your orange for light mode */
    --icon-fg-hover: #ff7a00;     /* same as default; change if you want a different hover shade */
  
    /* Background tile & border (keep subtle; or set to transparent if you want only glyphs) */
    --icon-bg: #fff7f0;           /* very light orange tint; or: transparent */
    --icon-border: #ffd9b3;       /* subtle border; or: transparent */
  
    --icon-bg-hover: #ffe8d6;     /* slightly stronger tint on hover */
    --icon-border-hover: #ffc99c; /* slightly stronger border */
  }
  
  /* DARK THEME */
  :root[data-theme="dark"] {
    --icon-fg: #ffffff;           /* white glyph in dark mode */
    --icon-fg-hover: #ffffff;     /* same on hover (or set to your dark accent) */
  
    --icon-bg: rgba(255,255,255,0.06);
    --icon-border: rgba(255,255,255,0.12);
  
    --icon-bg-hover: rgba(255,255,255,0.12);
    --icon-border-hover: rgba(255,255,255,0.18);
  }
  
  /* ===========================
     Icon button baseline
     =========================== */
  
     .cv-icon-link {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 8px;
      
        color: var(--icon-fg);                   /* glyph color */
        background: var(--icon-bg);              /* tile background (set to transparent to remove tile) */
        border: 1px solid var(--icon-border);
      
        text-decoration: none;
        transition: transform .15s ease, background .15s ease,
                    color .15s ease, border-color .15s ease;
      }
      
      .cv-icon-link:hover {
        transform: translateY(-1px);
        color: var(--icon-fg-hover);
        background: var(--icon-bg-hover);
        border-color: var(--icon-border-hover);
      }
      
      /* Ensure SVGs track the button color in both fill & stroke */
      .cv-icon-link svg { width: 18px; height: 18px; display: block; }
      .cv-icon-link svg * { fill: currentColor; stroke: currentColor; }


.talk-hero-image {
    display: block;
    margin: 0 auto;          /* centers horizontally */
    width: 100%;
    height: clamp(160px, 26vw, 320px);
    object-fit: cover;                 /* crop instead of stretching */
    object-position: center;
    border-radius: 10px;
    display: block;       /* avoid too small on mobile */
  }
  @media (max-width: 700px) {
    .talk-hero-image { width: 90%; }
  }

/* ========== BASE STYLES ========== */
.filter-btn {
    padding: 0.6rem 1.2rem;
    background: var(--color-surface-elevated);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
  }
  
  .filter-btn:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
  }
  
  .filter-btn.active {
    background: var(--color-accent-primary);
    color: white;
    border-color: var(--color-accent-primary);
  }

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========== GRAIN TEXTURE ========== */

.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 100;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* ========== NAVIGATION ========== */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: var(--color-surface);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-speed);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.logo:hover {
    color: var(--color-accent-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-speed);
    position: relative;
}

.nav-links a.active {
    color: var(--color-accent-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    transition: width var(--transition-speed);
}

.nav-links a:hover {
    color: var(--color-accent-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Ensure nav sits above the grain (your grain has z-index:100) */
nav { z-index: 200; }

/* A11y helper */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* Hamburger button base */
.nav-toggle {
  display: none;                 /* hidden on desktop */
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition-speed),
              border-color var(--transition-speed),
              transform .15s ease;
  margin-left: .5rem;
}

.nav-toggle:hover {
  background: var(--color-highlight-primary);
  border-color: var(--color-accent-primary);
  transform: translateY(-1px);
}

/* Swap icons based on state */
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* Desktop keeps your current inline list */
@media (min-width: 969px) {
  /* Make sure desktop layout shows the inline menu as before */
  #primaryNav {
    position: static;
    display: flex !important;
    gap: 2rem;
  }
}

/* Mobile: hamburger + slide-down menu */
@media (max-width: 968px) {
  .logo-image { height: 56px; }   /* optional: smaller logo on phones */

  .nav-content {
    display: grid;
    grid-template-columns: auto 1fr auto auto; /* logo | spacer | hamburger | theme */
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;  /* slightly tighter */
  }

  /* Show hamburger on mobile */
  .nav-toggle { display: inline-flex; }

  /* Keep theme toggle on the far right */
  .theme-toggle { justify-self: end; }

  /* Menu panel */
  #primaryNav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 30px rgba(0,0,0,.25);
    display: flex;
    flex-direction: column;
    padding: 0.5rem;
    gap: 0.25rem;
    transform-origin: top;
    animation: menuIn .18s ease;
  }

  /* When hidden attribute is present, ensure it doesn't render */
  #primaryNav[hidden] { display: none !important; }

  #primaryNav li { list-style: none; }

  #primaryNav a {
    display: block;
    padding: 0.9rem 1rem;
    border-radius: 8px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 1rem;
    line-height: 1.2;
    transition: background .15s ease, color .15s ease;
  }

  #primaryNav a:hover,
  #primaryNav a.active {
    background: var(--color-highlight-primary);
    color: var(--color-accent-primary);
  }

  /* Optional: prevent page scroll when menu is open */
  body.no-scroll { overflow: hidden; }
}

/* Subtle slide-down */
@keyframes menuIn {
  from { opacity: 0; transform: scaleY(0.98); }
  to   { opacity: 1; transform: scaleY(1); }
}

/* Safety: make sure decorative overlays don't capture taps */
.grain { pointer-events: none; }

/* Desktop layout: keep inline menu, theme toggle at far right */
/* Desktop: links align to the right, theme toggle at the far right */
@media (min-width: 969px) {
    .nav-content {
      display: flex;
      align-items: center;
      gap: 2rem;
      padding: 1.5rem 2rem;         /* keep your desktop padding */
    }
  
    /* Order in the row */
    .logo         { order: 1; }
    .nav-links    { 
      order: 2; 
      display: flex !important; 
      gap: 2rem; 
      margin-left: auto;            /* <-- pushes links to the right side */
      justify-content: flex-end;    /* <-- right-align the items within */
      align-items: center;
    }
    .theme-toggle { 
      order: 3; 
      flex: 0 0 auto; 
      margin-left: 1rem;            /* small gap between links and toggle */
    }
  
    /* Make sure the desktop menu is inline (not the mobile panel style) */
    #primaryNav { 
      position: static; 
      box-shadow: none; 
      border: 0; 
      padding: 0; 
      animation: none; 
      flex-direction: row; 
    }
  
    /* Hide the hamburger on desktop */
    .nav-toggle { display: none !important; }
  }
  
  /* Mobile layout (keep your hamburger + slide-down panel) */
  @media (max-width: 968px) {
    .nav-content {
      display: grid;
      /* columns: logo | flexible spacer | hamburger | theme */
      grid-template-columns: auto 1fr auto auto;
      align-items: center;
      gap: 0.75rem;
      padding: 1rem 1.25rem;
    }
  
    /* Make sure buttons show on the right */
    .nav-toggle   { display: inline-flex; grid-column: 3; justify-self: end; }
    .theme-toggle { grid-column: 4; justify-self: end; }
  
    /* Optional: smaller logo on phones */
    .logo-image { height: 56px; }
  
    /* Dropdown panel */
    #primaryNav {
      position: absolute;
      top: 100%; left: 0; right: 0;
      background: var(--color-surface);
      border-bottom: 1px solid var(--color-border);
      box-shadow: 0 12px 30px rgba(0,0,0,.25);
      display: flex;
      flex-direction: column;
      padding: 0.5rem;
      gap: 0.25rem;
      transform-origin: top;
      animation: menuIn .18s ease;
    }
    #primaryNav[hidden] { display: none !important; }
  
    #primaryNav li { list-style: none; }
    #primaryNav a {
      display: block;
      padding: 0.9rem 1rem;
      border-radius: 8px;
      color: var(--color-text-secondary);
      text-decoration: none;
      font-size: 1rem;
      line-height: 1.2;
      transition: background .15s ease, color .15s ease;
    }
    #primaryNav a:hover,
    #primaryNav a.active {
      background: var(--color-highlight-primary);
      color: var(--color-accent-primary);
    }
  
    body.no-scroll { overflow: hidden; } /* optional while menu open */
  }
  
  /* Subtle dropdown animation */
  @keyframes menuIn {
    from { opacity: 0; transform: scaleY(0.98); }
    to   { opacity: 1; transform: scaleY(1); }
  }
  
  /* Safety: nav above grain */
  nav { z-index: 200; }
  .grain { pointer-events: none; }
/* Reduce spacing after keynotes */
#keynotesWrap {
    margin-bottom: 1.25rem;
  }
  
  /* Timeline container */
  #timeline {
    position: relative;
    padding-left: 3rem;
}
/* Remove huge global padding inside timeline year sections */
#timeline section {
    padding: 0; /* remove vertical padding */
}

#timeline::after {
    content: "";
    position: absolute;
    left: calc(1.25rem - 4px);
    top: calc(var(--timeline-start, 0) - 40px); /* ↑ raise arrow */
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-bottom: 10px solid var(--color-accent-primary);
}

#timeline::before {
    content: "";
    position: absolute;
    left: 1.25rem;
    width: 5px;
    background: var(--color-accent-primary);
    top: calc(var(--timeline-start, 0) - 30px); /* stays aligned with arrow */
    height: calc(100% - (var(--timeline-start, 0) - 30px));
}



.timeline-year {
    position: relative;
    padding-left: 1rem;
}

/* YEAR LABEL + TICK */
.timeline-year .section-header {
    position: relative;
    padding-left: 0.5rem;
}

.timeline-year .section-header h3 {
    color: var(--color-accent-primary);
}

/* Aligned tick */
.timeline-year .section-header::before {
    content: "";
    position: absolute;
    left: -1.5rem;
    top: 50%;
    width: 12px;
    height: 2px;
    background: var(--color-accent-primary);
    transform: translateY(-50%);
}

/* Year header when it sits under the year's talks */
.section-header--below-year {
    margin-top: 2rem;     /* space between last talk and the year label */
    margin-bottom: 2.5rem;/* space before the next year's talks start */
  }
  
  /* Optional: style the year label in accent and add the small tick */
  .timeline-year .section-header--below-year h3 {
    color: var(--color-accent-primary);
  }
  
  .timeline-year .section-header--below-year {
    position: relative;
    padding-left: 0.5rem;
  }
  
  .timeline-year .section-header--below-year::before {
    content: "";
    position: absolute;
    left: -1.5rem;      /* align with the vertical line */
    top: 50%;
    width: 12px;
    height: 2px;
    background: var(--color-accent-primary);
    transform: translateY(-50%);
  }
  

/* Theme Toggle */
.theme-toggle {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-speed);
}

.theme-toggle:hover {
    border-color: var(--color-accent-primary);
    background: var(--color-highlight-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
}

.logo-image {
    height: 112px; /* adjust size as desired */
    width: auto;
    display: block;
}
/* ========== SECTIONS ========== */


section {
    padding: 4rem 0;
    position: relative;
}

.section-header {
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 2px;
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 700px;
}
/* ========= CV =============*/
/* Ensure both columns start at the same top line */
/* Remove global section padding for the right column inside the CV grid */
.cv-grid > section {
    padding: 0;             /* kills the 4rem top/bottom padding in the right column */
  }
  
  /* Make sure both columns align to the top baseline */
  .cv-grid {
    align-items: start;     /* you already set this, keep it */
  }
  
  /* (Optional) ensure the first card in the right column doesn't add extra top spacing */
  .cv-grid > section .cv-section:first-child {
    margin-top: 0;
  }
  
  /* Contact icons row */
  .cv-contact-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 0.8rem;
    align-items: center;
    justify-content: center;       /* center in the sidebar; change to 'flex-start' if preferred */
    padding: 0;
    margin: 0.2rem 0 0 0;
    list-style: none;
  }
  
 
/* ========== CARDS ========== */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem;
    transition: all var(--transition-speed);
}

.card:hover {
    border-color: var(--color-accent-primary);
    background: var(--color-surface-elevated);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--color-highlight-primary);
}

.card.secondary-accent:hover {
    border-color: var(--color-accent-secondary);
    box-shadow: 0 8px 24px var(--color-highlight-secondary);
}
.talk-card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
  }
  
  .talk-card {
    position: relative;
    height: 400px;
    border-radius: 10px;
    overflow: hidden;
    color: #fff;
    cursor: pointer;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
    transition: transform 0.2s ease;
  }
  
  .talk-card:hover { transform: scale(1.02); }
  
  .talk-card-overlay {
    width: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.7), rgba(0,0,0,0));
    padding: 1rem;
  }
  
  .talk-card-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0;
  }
  
  .talk-card-subtitle {
    font-size: 1rem;
    opacity: 0.85;
    margin-top: 0.3rem;
  }
  
/* ========== BUTTONS & LINKS ========== */

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-speed);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--color-accent-primary);
    color: white;
    border: 1px solid var(--color-accent-primary);
}

.btn-primary:hover {
    background: var(--color-accent-secondary);
    border-color: var(--color-accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--color-highlight-secondary);
}

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

.btn-secondary:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    background: var(--color-highlight-primary);
}

/* ========== TAGS ========== */

.tag {
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-block;
}

.tag-primary {
    background: var(--color-highlight-primary);
    border: 1px solid var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.tag-secondary {
    background: var(--color-highlight-secondary);
    border: 1px solid var(--color-accent-secondary);
    color: var(--color-accent-secondary);
}
.tag-tertiary {
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid #3b82f6;
    color: #3b82f6;
  }

/* ========== PROFILE IMAGE ========== */

.profile-image {
    width: 300px;
    height: 300px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-speed);
}

.profile-image:hover {
    transform: translateY(-8px) rotate(2deg);
    box-shadow: 0 30px 80px var(--color-highlight-primary);
    border-color: var(--color-accent-secondary);
}


/* ========== GRADIENTS ========== */

.gradient-text {
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-primary) 50%, var(--color-accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-bg {
    background: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 100%);
}

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

footer {
    border-top: 1px solid var(--color-border);
    padding: 3rem 0;
    text-align: center;
    color: var(--color-text-secondary);
}

footer a {
    color: var(--color-accent-primary);
    text-decoration: none;
}

footer a:hover {
    color: var(--color-accent-secondary);
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out both;
}

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }