/* ================================================================
   AMAN'S PORTFOLIO — style.css
   Theme: Cyberpunk-Minimal | Dark Mode | Electric Blue Accents
   Fonts: Syne (headings) · Outfit (body) · JetBrains Mono (code)
================================================================ */


/* ----------------------------------------------------------------
   0.  CSS CUSTOM PROPERTIES (Design Tokens)
       Change these to retheme the entire site instantly.
---------------------------------------------------------------- */
:root {
  /* Palette */
  --bg:          #080c14;   /* deepest background */
  --bg-2:        #0d1221;   /* section alternating bg */
  --bg-card:     #111827;   /* card surfaces */
  --bg-card-h:   #162035;   /* card hover surfaces */
  --border:      #1e2d47;   /* subtle borders */
  --border-glow: #1e6fff44; /* glowing border on hover */

  --accent:      #2979ff;   /* electric blue — primary accent */
  --accent-2:    #7c3aed;   /* purple — secondary accent */
  --accent-3:    #00e5ff;   /* cyan — tertiary / highlights */

  --text-primary:   #eaf0ff;
  --text-secondary: #8899bb;
  --text-muted:     #4a5c7a;

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body:    'Outfit', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Spacing & Shape */
  --radius:      12px;
  --radius-sm:   6px;
  --max-width:   1140px;
  --nav-height:  68px;

  /* Transitions */
  --ease:        cubic-bezier(.4,0,.2,1);
  --trans:       0.3s var(--ease);
}


/* ----------------------------------------------------------------
   1.  RESET & BASE
---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Remove list styling globally for nav/skill lists */
ul { list-style: none; }
a  { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* Scrollbar styling (Webkit) */
::-webkit-scrollbar          { width: 6px; }
::-webkit-scrollbar-track    { background: var(--bg-2); }
::-webkit-scrollbar-thumb    { background: var(--accent); border-radius: 3px; }

/* Selection color */
::selection { background: var(--accent); color: #fff; }


/* ----------------------------------------------------------------
   2.  UTILITY CLASSES
---------------------------------------------------------------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Monospace / code-style text */
.mono {
  font-family: var(--font-mono);
  font-size: .85em;
  letter-spacing: .02em;
}

/* Accent colour text */
.accent { color: var(--accent); }

/* Section layout */
.section {
  padding: 6rem 0;
}
.section-alt {
  background: var(--bg-2);
}

/* ──────────────────────────────────
   Section heading component
────────────────────────────────── */
.section-heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}
.section-num {
  color: var(--accent);
  font-size: .8rem;
  opacity: .7;
}
.section-heading h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--text-primary);
  white-space: nowrap;
}
.heading-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
}


/* ----------------------------------------------------------------
   3.  SCROLL-REVEAL ANIMATION
       Elements with class .reveal start invisible and slide up.
       JS adds .visible when they enter the viewport.
---------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Staggered delay for card grids */
.reveal:nth-child(2) { transition-delay: .08s; }
.reveal:nth-child(3) { transition-delay: .16s; }
.reveal:nth-child(4) { transition-delay: .24s; }
.reveal:nth-child(5) { transition-delay: .32s; }
.reveal:nth-child(6) { transition-delay: .40s; }


/* ----------------------------------------------------------------
   4.  NAVIGATION BAR
---------------------------------------------------------------- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  /* Glassmorphism */
  background: rgba(8, 12, 20, .7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--trans), background var(--trans);
}
/* Adds visible border after scrolling (via JS .scrolled class) */
#navbar.scrolled {
  border-bottom-color: var(--border);
  background: rgba(8, 12, 20, .92);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--text-primary);
  letter-spacing: -.03em;
}

/* Desktop links */
.nav-links {
  display: flex;
  gap: .25rem;
  align-items: center;
}
.nav-link {
  font-size: .875rem;
  font-weight: 500;
  padding: .45rem .85rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: color var(--trans), background var(--trans);
}
.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}
/* Contact CTA in nav */
.cta-nav {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  border-radius: var(--radius-sm);
}
.cta-nav:hover {
  background: var(--accent) !important;
  color: #fff !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .4rem;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--trans), opacity var(--trans);
}
/* Animated X state */
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile dropdown menu */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  z-index: 999;
  background: rgba(8, 12, 20, .97);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: .75rem 1.5rem 1.25rem;
  gap: .25rem;
  transform: translateY(-110%);
  opacity: 0;
  transition: transform .35s var(--ease), opacity .35s var(--ease);
  pointer-events: none;
}
.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mob-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: .6rem .5rem;
  border-radius: var(--radius-sm);
  transition: color var(--trans), background var(--trans);
}
.mob-link:hover {
  color: var(--accent);
  background: var(--bg-card);
}


/* ----------------------------------------------------------------
   5.  HERO SECTION
---------------------------------------------------------------- */
#hero {
  position: relative;
  min-height: 100svh;        /* safe viewport height */
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--nav-height) 1.5rem 4rem;
}

/* Particle canvas fills the entire hero */
#particleCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Subtle grid overlay */
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: .18;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 50%, black 30%, transparent 100%);
}

/* Hero content block */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

/* Pre-label */
.hero-label {
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: .12em;
  font-size: .8rem;
  text-transform: uppercase;
  animation: fadeUp .8s var(--ease) .2s both;
}

/* Giant name with staggered letter animation */
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(4rem, 14vw, 10rem);
  font-weight: 800;
  letter-spacing: -.04em;
  line-height: .95;
  margin-bottom: 1.5rem;
  /* Gradient text */
  background: linear-gradient(135deg, #eaf0ff 0%, var(--accent-3) 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.name-char {
  display: inline-block;
  animation: nameIn .7s var(--ease) calc(var(--d) * .08s + .4s) both;
}
@keyframes nameIn {
  from { opacity: 0; transform: translateY(40px) rotateX(-30deg); }
  to   { opacity: 1; transform: translateY(0) rotateX(0); }
}

/* Tagline */
.hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  margin-bottom: .75rem;
  animation: fadeUp .8s var(--ease) .9s both;
}
.static-tag    { color: var(--text-primary); font-weight: 600; }
.divider       { opacity: .4; }
.typed-role    { color: var(--accent-3); font-weight: 600; }
.cursor-blink  {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0;} }

/* Sub-label (location) */
.hero-sub {
  color: var(--text-muted);
  font-size: .8rem;
  letter-spacing: .06em;
  margin-bottom: 2.5rem;
  animation: fadeUp .8s var(--ease) 1.05s both;
}

/* CTA button group */
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp .8s var(--ease) 1.2s both;
}


/* ──────────────────────────────────
   Shared button styles
────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 2rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .04em;
  cursor: pointer;
  transition: all var(--trans);
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: #fff2;
  opacity: 0;
  transition: opacity var(--trans);
}
.btn:hover::after { opacity: 1; }

/* Solid primary */
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px #2979ff44;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 36px #2979ff66;
}

/* Ghost outline */
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}


/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  z-index: 2;
  animation: fadeUp .8s var(--ease) 1.5s both;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent, var(--accent));
  animation: scrollPulse 2s ease-in-out infinite;
}
.scroll-text {
  color: var(--text-muted);
  font-size: .65rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}
@keyframes scrollPulse {
  0%,100% { opacity: .3; transform: scaleY(1); }
  50%      { opacity: 1;  transform: scaleY(1.15); }
}


/* ─── Shared fade-up keyframe ───────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* ----------------------------------------------------------------
   6.  ABOUT SECTION
---------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 4rem;
  align-items: start;
}

/* Image wrapper */
.about-img-wrap { display: flex; justify-content: center; }
.about-img-frame {
  position: relative;
  width: 240px;
  aspect-ratio: 3/4;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
}
.about-img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: radial-gradient(circle at 50% 40%, #1a2a4a, var(--bg-card));
}
/* About text */
.about-text { display: flex; flex-direction: column; gap: 1rem; }
.about-hi {
  font-size: 1rem;
  letter-spacing: .04em;
  margin-bottom: .25rem;
}
.about-text p { color: var(--text-secondary); font-size: .97rem; }
.about-text strong { color: var(--text-primary); }

/* Stats row */
.stats-row {
  display: flex;
  gap: 2rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.stat-item {
  display: flex;
  flex-direction: column;
  gap: .1rem;
}
.stat-num {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1;
}
.stat-num sup { font-size: .55em; vertical-align: super; }
.stat-label {
  font-size: .7rem;
  color: var(--text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}


/* ----------------------------------------------------------------
   7.  SKILLS SECTION
---------------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--trans), background var(--trans), transform var(--trans);
  animation-delay: var(--card-delay, 0s);
}
.skill-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-h);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px #2979ff18;
}

.skill-card-header {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.5rem;
}
.skill-icon { font-size: 1.4rem; }
.skill-card-header h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-list { display: flex; flex-direction: column; gap: 1rem; }
.skill-list li { display: flex; flex-direction: column; gap: .35rem; }
.skill-name {
  font-size: .82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Animated progress bar */
.skill-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  width: 0;                  /* starts at 0, animated to --p by JS */
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-3) 100%);
  border-radius: 2px;
  transition: width 1.2s cubic-bezier(.4,0,.2,1);
}

/* Tag cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: .75rem;
  padding: .3rem .75rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: border-color var(--trans), color var(--trans), background var(--trans);
  cursor: default;
}
.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #2979ff11;
}


/* ----------------------------------------------------------------
   8.  ACHIEVEMENTS / TIMELINE
---------------------------------------------------------------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}
/* Vertical connecting line */
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}
.timeline-dot {
  position: absolute;
  left: -1.75rem;
  top: 1.35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--trans), transform var(--trans);
}
.timeline-card:hover {
  border-color: var(--border-glow);
  transform: translateX(4px);
}
/* Highlighted (top achievement) card */
.highlight-card {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--bg-card) 60%, #1a2e54);
  box-shadow: 0 0 32px #2979ff1a;
}

.tl-badge {
  display: inline-block;
  font-size: .72rem;
  color: var(--accent-3);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: .6rem;
}
.tl-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: .6rem;
}
.tl-body {
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.tl-body strong { color: var(--text-primary); }
.tl-year {
  display: inline-block;
  margin-top: .85rem;
  font-size: .72rem;
  color: var(--text-muted);
  letter-spacing: .06em;
}
.video-wrapper {
    position: relative;
    width: calc(100% + 40px); /* Makes it wider than the text */
    margin-left: -20px;       /* Pulls it to the left to center the extra width */
    margin-top: 30px;
    margin-bottom: 30px;
    padding-top: 56.25%;      /* Maintains 16:9 widescreen ratio */
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.video-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* For mobile/tablets where space is tight */
@media (max-width: 768px) {
    .video-wrapper {
        width: 100%;
        margin-left: 0;
    }
}


/* ----------------------------------------------------------------
   9.  HOBBIES SECTION
---------------------------------------------------------------- */
.hobbies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.hobby-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  transition: all var(--trans);
  animation-delay: var(--card-delay, 0s);
  cursor: default;
}
.hobby-card:hover {
  border-color: var(--accent-2);
  background: var(--bg-card-h);
  transform: translateY(-5px);
  box-shadow: 0 12px 32px #7c3aed1a;
}
.hobby-icon {
  font-size: 2rem;
  margin-bottom: .85rem;
}
.hobby-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .4rem;
}
.hobby-card p {
  font-size: .85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}


/* ----------------------------------------------------------------
   10.  CONTACT SECTION
---------------------------------------------------------------- */
.contact-container {
  text-align: center;
  max-width: 640px;
}
.contact-sub {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 2rem;
}
.email-btn {
  font-size: .9rem;
  letter-spacing: .04em;
  margin-bottom: 2.5rem;
}

/* Social links row */
.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.social-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  color: var(--text-secondary);
  transition: all var(--trans);
}
.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #2979ff0d;
  transform: translateY(-2px);
}
.social-link svg { flex-shrink: 0; }


/* ----------------------------------------------------------------
   11.  FOOTER BAR
---------------------------------------------------------------- */
footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 1.5rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-copy, .footer-made {
  font-size: .75rem;
  color: var(--text-muted);
}
.footer-made a {
  color: var(--accent);
  transition: opacity var(--trans);
}
.footer-made a:hover { opacity: .7; }


/* ----------------------------------------------------------------
   12.  RESPONSIVE — MOBILE & TABLET
---------------------------------------------------------------- */

/* Tablet (< 900px) */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .about-img-wrap { justify-content: flex-start; }
  .about-img-frame { width: 180px; }
}

/* Mobile (< 640px) */
@media (max-width: 640px) {
  .section { padding: 4rem 0; }

  /* Show hamburger, hide desktop links */
  .hamburger    { display: flex; }
  .nav-links    { display: none; }

  .hero-name    { font-size: clamp(3.5rem, 20vw, 5.5rem); }
  .hero-actions { gap: .75rem; }

  .skills-grid  { grid-template-columns: 1fr; }
  .hobbies-grid { grid-template-columns: 1fr 1fr; }
  .timeline     { padding-left: 1.5rem; }

  .stats-row { gap: 1.5rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}

/* Very small (< 400px) */
@media (max-width: 400px) {
  .hobbies-grid { grid-template-columns: 1fr; }
}


/* ----------------------------------------------------------------
   13.  ARDUINO ROBOT CARD — new achievement styles
---------------------------------------------------------------- */

/* Special accent on the robot card (green-teal shimmer to
   distinguish it from the blue JEE highlight card) */
.robot-card {
  border-color: #00c896;
  background: linear-gradient(135deg, var(--bg-card) 55%, #0a2520);
  box-shadow: 0 0 32px #00c8961a;
}
.robot-card .tl-badge { color: #00e5b0; }

/* ── Timeline card footer: year + button on same row ──────── */
.tl-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1rem;
  padding-top: .85rem;
  border-top: 1px solid var(--border);
}

/* LinkedIn / "View Project" pill button inside the card */
.btn-tl-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .45rem 1rem;
  border-radius: 100px;
  border: 1px solid #0a66c2;
  color: #5599e8;
  background: #0a66c20d;
  transition: all var(--trans);
  white-space: nowrap;
}
.btn-tl-link:hover {
  background: #0a66c2;
  color: #fff;
  border-color: #0a66c2;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px #0a66c233;
}

/* ── Google Slides / presentation embed wrapper ───────────── */
.slides-wrapper {
  position: relative;
  width: 100%;
  /* 16:9 aspect ratio */
  aspect-ratio: 16 / 9;
  margin: 1.25rem 0 .5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
  /* Fade-in when it enters view */
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .7s var(--ease) .15s, transform .7s var(--ease) .15s;
}
/* Triggered by JS reveal observer when parent card becomes visible */
.timeline-item.visible .slides-wrapper {
  opacity: 1;
  transform: translateY(0);
}

/* The actual iframe fills the wrapper completely */
.slides-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: var(--radius);
}

/* Placeholder shown while no real embed URL is set */
.slides-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  background: radial-gradient(ellipse at 50% 40%, #0d1f18, var(--bg));
  border-radius: var(--radius);
  pointer-events: none; /* hidden once iframe loads */
}
/* Hide placeholder once a real src is set (JS removes it) */
.slides-placeholder.hidden { display: none; }
.slides-ph-icon { font-size: 2.5rem; }
.slides-placeholder p {
  font-size: .82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0 1rem;
}

/* ── Responsive: shrink embed on small screens ─────────────── */
@media (max-width: 640px) {
  .tl-footer { flex-direction: column; align-items: flex-start; }
  .slides-wrapper { margin: 1rem 0 .25rem; }
}