/* ============================================================
   RIFAATH AMEEN — PORTFOLIO
   ============================================================ */

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

/* === CUSTOM SCROLLBAR === */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 2px; }

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Dark theme (default) */
  --bg:           #07080f;
  --bg-2:         #0d0e1a;
  --surface:      #111220;
  --surface-2:    #181926;
  --border:       rgba(255, 255, 255, 0.06);
  --border-h:     rgba(255, 255, 255, 0.13);
  --text:         #eae8f5;
  --text-2:       #8785a0;
  --text-3:       #47455e;
  --accent:       #00e5ff;
  --accent-dim:   rgba(0, 229, 255, 0.09);
  --accent-glow:  rgba(0, 229, 255, 0.22);
  --violet:       #9d8fff;
  --violet-dim:   rgba(157, 143, 255, 0.1);
  --green:        #4ade80;
  --orange:       #fb923c;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --nav-h:        68px;
  --max-w:        1060px;
  --r:            12px;
  --ease:         cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring:  cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-theme="light"] {
  --bg:         #f6f5fc;
  --bg-2:       #eeecf8;
  --surface:    #ffffff;
  --surface-2:  #eeecf8;
  --border:     rgba(0, 0, 0, 0.07);
  --border-h:   rgba(0, 0, 0, 0.15);
  --text:       #1a1828;
  --text-2:     #56546e;
  --text-3:     #9e9cb4;
  --accent:     #0099bb;
  --accent-dim: rgba(0, 153, 187, 0.08);
  --accent-glow: rgba(0, 153, 187, 0.18);
  --violet:     #7c6af2;
  --violet-dim: rgba(124, 106, 242, 0.08);
}

/* ============================================================
   CROSSHAIR CURSOR
   ============================================================ */
.cursor {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 200ms;
}
.cursor-dot {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transition: transform 150ms var(--ease), opacity 150ms;
}
.cursor-lines {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 24px; height: 24px;
}
.cursor-lines::before,
.cursor-lines::after {
  content: '';
  position: absolute;
  background: var(--accent);
  opacity: 0.55;
}
.cursor-lines::before {
  width: 100%; height: 1px;
  top: 50%; left: 0;
  transform: translateY(-50%);
}
.cursor-lines::after {
  width: 1px; height: 100%;
  left: 50%; top: 0;
  transform: translateX(-50%);
}
.cursor.hover .cursor-dot {
  transform: translate(-50%, -50%) scale(4);
  opacity: 0.25;
}
.cursor.hover .cursor-lines::before,
.cursor.hover .cursor-lines::after {
  opacity: 0;
}

/* ============================================================
   INTRO OVERLAY
   ============================================================ */
#intro {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3rem;
}
.intro-lines { overflow: hidden; text-align: center; }
.intro-line {
  font-size: clamp(1.6rem, 4.5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  color: var(--text-2);
  transform: translateY(110%);
  line-height: 1.25;
  will-change: transform;
}
.intro-line strong { color: var(--text); font-weight: 600; }
.intro-line em { color: var(--accent); font-style: normal; font-family: var(--font-mono); }
#intro-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--text-3);
  background: none;
  border: 1px solid var(--border);
  padding: 0.7rem 2.2rem;
  cursor: pointer;
  opacity: 0;
  transition: border-color 200ms, color 200ms;
}
#intro-btn:hover { border-color: var(--accent); color: var(--accent); }
#slider-a { position: fixed; inset: 0; z-index: 999; background: var(--accent); pointer-events: none; }
#slider-b { position: fixed; inset: 0; z-index: 998; background: var(--violet); pointer-events: none; }

/* ============================================================
   SITE WRAPPER
   ============================================================ */
#site { transform: translateY(100vh); will-change: transform; }

/* ============================================================
   NAVIGATION
   ============================================================ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  background: rgba(7, 8, 15, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: transform 350ms var(--ease);
}
[data-theme="light"] #nav { background: rgba(246, 245, 252, 0.88); }
.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  font-weight: 500;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-2);
  letter-spacing: 0.04em;
  transition: color 200ms;
}
.nav-links a .n { color: var(--accent); margin-right: 0.35em; }
.nav-links a:hover { color: var(--text); }
.nav-r { display: flex; align-items: center; gap: 0.65rem; }
#theme-btn {
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: none;
  color: var(--text-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  transition: border-color 200ms, color 200ms;
}
#theme-btn:hover { border-color: var(--accent); color: var(--accent); }
.resume-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  transition: background 200ms;
}
.resume-btn:hover { background: var(--accent-dim); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--text);
  transition: all 300ms;
}

/* ============================================================
   LAYOUT HELPERS
   ============================================================ */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 clamp(1.5rem, 5vw, 4rem); }
section { padding: 5.5rem 0; }
#about, #research, #achievements { background: var(--bg-2); }

/* Section header */
.sh {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}
.sh-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
}
.sh h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.55rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.sh-line { flex: 1; height: 1px; background: var(--border); max-width: 260px; }

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  min-height: calc(100vh - var(--nav-h));
  padding-top: var(--nav-h);
  display: grid;
  grid-template-columns: 1fr 400px;
  align-items: center;
  gap: 2rem;
  position: relative;
  overflow: hidden;
}

/* Dot grid */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.055) 1.2px, transparent 1.2px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 85% 90% at 40% 50%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 90% at 40% 50%, black 0%, transparent 100%);
  pointer-events: none;
}

.hero-col { position: relative; z-index: 1; }

/* Status pill */
.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.35rem 0.9rem;
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-2);
  letter-spacing: 0.04em;
}
.sdot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 7px var(--green);
  animation: blink 2.8s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}
h1.hero-name {
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.03;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.hero-role {
  font-size: clamp(1.1rem, 2.6vw, 1.75rem);
  font-weight: 300;
  color: var(--text-2);
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.hero-role span { color: var(--violet); font-weight: 400; }
.hero-desc {
  max-width: 460px;
  font-size: 0.93rem;
  color: var(--text-2);
  line-height: 1.82;
  margin-bottom: 2.25rem;
}
.hero-cta {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.btn-fill {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.06em;
  padding: 0.78rem 1.6rem;
  background: var(--accent);
  color: #07080f;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background 200ms, transform 200ms, box-shadow 200ms;
  display: inline-flex; align-items: center; gap: 0.4rem;
}
.btn-fill:hover {
  background: #30ecff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.06em;
  padding: 0.78rem 1.6rem;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 200ms, color 200ms, transform 200ms;
  display: inline-flex; align-items: center; gap: 0.4rem;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* Social links */
.hero-soc { display: flex; gap: 0.7rem; }
.soc {
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-2);
  transition: border-color 200ms, color 200ms, background 200ms, transform 200ms;
}
.soc:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); transform: translateY(-2px); }
.soc svg { width: 16px; height: 16px; }

/* Skeleton canvas area */
#hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 520px;
}
#skeleton-canvas { display: block; }
.canvas-label {
  position: absolute;
  bottom: 0.75rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-3);
  letter-spacing: 0.18em;
  white-space: nowrap;
}

/* Scroll indicator */
.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: clamp(1.5rem, 5vw, 4rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-3);
  letter-spacing: 0.22em;
  writing-mode: vertical-rl;
  animation: scrollDrift 2.2s ease-in-out infinite;
}
.scroll-hint::after {
  content: '';
  width: 1px; height: 36px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
@keyframes scrollDrift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(7px); }
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 5rem;
  align-items: start;
}
.about-text p {
  font-size: 0.93rem;
  color: var(--text-2);
  line-height: 1.87;
  margin-bottom: 1.15rem;
}
.about-text .hi { color: var(--text); font-weight: 500; }
.about-text a { color: var(--accent); border-bottom: 1px solid var(--accent-dim); transition: border-color 200ms; }
.about-text a:hover { border-color: var(--accent); }

.about-photo {
  position: relative;
  display: flex;
  justify-content: center;
}
.about-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent);
  border-radius: calc(var(--r) + 2px);
  transform: translate(10px, 10px);
  pointer-events: none;
  z-index: 0;
  transition: transform 250ms var(--ease);
}
.about-photo:hover::after { transform: translate(5px, 5px); }
.about-img {
  width: 100%; max-width: 260px;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--r);
  filter: grayscale(20%) contrast(1.05);
  position: relative; z-index: 1;
  transition: filter 250ms;
}
.about-photo:hover .about-img { filter: none; }

/* ============================================================
   EXPERIENCE / TIMELINE
   ============================================================ */
.timeline { display: flex; flex-direction: column; }
.tl {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  position: relative;
}
.tl::before {
  content: '';
  position: absolute;
  left: calc(145px + 1.25rem - 0.5px);
  top: 8px; bottom: 0;
  width: 1px;
  background: var(--border);
}
.tl:last-child::before { display: none; }
.tl-date {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  color: var(--text-3);
  text-align: right;
  line-height: 1.5;
  padding-top: 0.2rem;
}
.tl-date .upcoming {
  display: inline-block;
  font-size: 0.58rem;
  background: var(--orange);
  color: #fff;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  letter-spacing: 0.06em;
  margin-top: 0.25rem;
}
.tl-body { padding-left: 1.75rem; position: relative; }
.tl-body::before {
  content: '';
  position: absolute;
  left: -5px; top: 7px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}
.tl .upcoming-marker .tl-body::before {
  background: var(--orange);
  box-shadow: 0 0 0 2px var(--orange);
}
.tl-role { font-size: 0.98rem; font-weight: 600; color: var(--text); letter-spacing: -0.01em; margin-bottom: 0.15rem; }
.tl-company { font-size: 0.83rem; color: var(--accent); margin-bottom: 0.75rem; }
.tl .upcoming-marker .tl-company { color: var(--orange); }
.tl-body ul { list-style: none; }
.tl-body ul li {
  font-size: 0.855rem;
  color: var(--text-2);
  line-height: 1.78;
  padding-left: 1rem;
  position: relative;
  margin-bottom: 0.4rem;
}
.tl-body ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.62rem;
  top: 0.32rem;
}

/* ============================================================
   RESEARCH / PROJECT CARDS
   ============================================================ */
.rg { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 476px), 1fr)); gap: 1.2rem; }

.pc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.6rem;
  position: relative;
  overflow: hidden;
  transition: border-color 250ms, box-shadow 250ms, transform 250ms var(--ease);
}
.pc::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--violet));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 300ms var(--ease);
}
.pc:hover::before { transform: scaleX(1); }
.pc:hover {
  border-color: rgba(0, 229, 255, 0.2);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.32);
  transform: translateY(-3px);
}
.pc-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}
.pc-lab {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}
.pc-gh a { color: var(--text-3); transition: color 200ms; display: flex; }
.pc-gh a:hover { color: var(--accent); }
.pc-gh svg { width: 16px; height: 16px; display: block; }
.pc-name { font-size: 0.98rem; font-weight: 600; color: var(--text); letter-spacing: -0.01em; margin-bottom: 0.18rem; }
.pc-period { font-family: var(--font-mono); font-size: 0.62rem; color: var(--text-3); margin-bottom: 0.78rem; }
.pc-desc { font-size: 0.845rem; color: var(--text-2); line-height: 1.78; }
.pc-stats { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.82rem 0; }
.stat {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  background: var(--violet-dim);
  color: var(--violet);
  padding: 0.22rem 0.52rem;
  border-radius: 4px;
}
.pc-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.95rem; }
.ptag {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  color: var(--text-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.22rem 0.52rem;
  border-radius: 4px;
}

/* ============================================================
   SKILLS
   ============================================================ */
.sg { display: grid; grid-template-columns: repeat(auto-fill, minmax(225px, 1fr)); gap: 1.15rem; }
.sc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.35rem;
  transition: border-color 250ms;
}
.sc:hover { border-color: var(--border-h); }
.sc-name {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.95rem;
}
.sc-name::before { content: '// '; color: var(--text-3); }
.sp-wrap { display: flex; flex-wrap: wrap; gap: 0.42rem; }
.sp {
  font-size: 0.77rem;
  color: var(--text-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.28rem 0.65rem;
  border-radius: 6px;
  transition: border-color 200ms, color 200ms, background 200ms;
}
.sp:hover { border-color: var(--accent); color: var(--text); background: var(--accent-dim); }

/* ============================================================
   EDUCATION
   ============================================================ */
.eg { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 436px), 1fr)); gap: 1.15rem; }
.ec {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.6rem;
  transition: border-color 250ms, transform 250ms var(--ease);
}
.ec:hover { border-color: rgba(0, 229, 255, 0.2); transform: translateY(-2px); }
.ec-badge { font-family: var(--font-mono); font-size: 0.62rem; color: var(--accent); letter-spacing: 0.07em; margin-bottom: 0.55rem; }
.ec-school { font-size: 1.02rem; font-weight: 600; color: var(--text); letter-spacing: -0.01em; margin-bottom: 0.22rem; }
.ec-prog { font-size: 0.86rem; color: var(--text-2); margin-bottom: 0.82rem; }
.ec-meta { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.em { display: flex; flex-direction: column; gap: 0.08rem; }
.em-l { font-family: var(--font-mono); font-size: 0.58rem; color: var(--text-3); letter-spacing: 0.12em; text-transform: uppercase; }
.em-v { font-size: 0.86rem; font-weight: 500; color: var(--text); }

/* ============================================================
   ACHIEVEMENTS
   ============================================================ */
.al { display: flex; flex-direction: column; gap: 0.95rem; }
.ai {
  display: flex;
  gap: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.35rem;
  transition: border-color 250ms;
}
.ai:hover { border-color: var(--border-h); }
.ai-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 0.05rem; }
.ai-body h4 { font-size: 0.9rem; font-weight: 600; color: var(--text); margin-bottom: 0.32rem; }
.ai-body p { font-size: 0.815rem; color: var(--text-2); line-height: 1.65; }

/* ============================================================
   CONTACT
   ============================================================ */
#contact { text-align: center; }
.ct-tag { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); letter-spacing: 0.1em; margin-bottom: 0.9rem; }
.ct-h { font-size: clamp(1.75rem, 5vw, 2.75rem); font-weight: 700; letter-spacing: -0.04em; color: var(--text); margin-bottom: 0.95rem; }
.ct-sub { font-size: 0.93rem; color: var(--text-2); max-width: 420px; margin: 0 auto 2.5rem; line-height: 1.82; }
.ct-email {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.95rem 2.5rem;
  border-radius: 8px;
  transition: background 200ms, transform 200ms, box-shadow 200ms;
  margin-bottom: 2.5rem;
}
.ct-email:hover { background: var(--accent-dim); transform: translateY(-2px); box-shadow: 0 8px 24px var(--accent-glow); }
.ct-links { display: flex; justify-content: center; gap: 1.75rem; flex-wrap: wrap; }
.ct-lnk {
  display: flex; align-items: center; gap: 0.45rem;
  font-size: 0.8rem; color: var(--text-2);
  transition: color 200ms;
}
.ct-lnk:hover { color: var(--accent); }
.ct-lnk svg { width: 14px; height: 14px; }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 1.65rem clamp(1.5rem, 5vw, 4rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
}
.fc { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-3); }
.fl { display: flex; gap: 1.5rem; }
.fl a { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-3); transition: color 200ms; }
.fl a:hover { color: var(--accent); }

/* ============================================================
   SCROLL FADE-IN ANIMATIONS
   ============================================================ */
.fi {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.58s var(--ease), transform 0.58s var(--ease);
}
.fi.vis { opacity: 1; transform: none; }
.d1 { transition-delay: 80ms; }
.d2 { transition-delay: 165ms; }
.d3 { transition-delay: 245ms; }
.d4 { transition-delay: 325ms; }

/* ============================================================
   MOBILE NAV
   ============================================================ */
#mob-nav {
  position: fixed; inset: 0; z-index: 99;
  background: var(--bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 1.85rem;
  transform: translateX(100%);
  transition: transform 380ms var(--ease);
}
#mob-nav.open { transform: none; }
#mob-nav a { font-size: 1.55rem; font-weight: 600; color: var(--text); transition: color 200ms; }
#mob-nav a:hover { color: var(--accent); }
#mob-close {
  position: absolute; top: 1.25rem; right: 1.5rem;
  background: none; border: none; color: var(--text); font-size: 1.3rem; cursor: pointer;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  #hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: calc(var(--nav-h) + 2.5rem) 0 4rem;
  }
  #hero::before { display: none; }
  #hero-visual { display: none; }
  .scroll-hint { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-photo { order: -1; }
}
@media (max-width: 768px) {
  .nav-links, .nav-r .resume-btn { display: none; }
  .hamburger { display: flex; }
  .tl { grid-template-columns: 1fr; gap: 0.35rem; }
  .tl::before { left: 3px; }
  .tl-date { text-align: left; }
  .tl-body { padding-left: 1.1rem; }
}
@media (max-width: 480px) {
  .hero-cta { flex-direction: column; }
  .btn-fill, .btn-ghost { justify-content: center; }
  footer { flex-direction: column; text-align: center; }
}

/* ============================================================
   THEME TRANSITION
   ============================================================ */
html.tt * {
  transition: background-color 300ms var(--ease), color 300ms var(--ease), border-color 300ms var(--ease) !important;
}