/* ============================================================
   reavann Portfolio — styles.css
   Mobile-first · liquid-glass · data-attr driven tweaks
   ============================================================ */

/* ---- Tweak-driven CSS variables ---- */
:root {
  /* Atmosphere: Amber (default) */
  --accent:      oklch(0.78 0.16 65);
  --accent-soft: oklch(0.84 0.11 70);
  --btn-primary-text: #1a1206;

  /* Glass: Frosted (default) */
  --glass-blur:     14px;
  --glass-sat:      165%;
  --glass-fill:     rgba(255,252,246,0.045);
  --glass-fill-hi:  rgba(255,252,246,0.075);
  --glass-edge:     rgba(255,248,235,0.14);
  --glass-edge-hi:  rgba(255,248,235,0.28);
  --glass-specular: 0.10;

  /* Type: Serif (default) */
  --font-display:   "Instrument Serif", Georgia, "Times New Roman", serif;
  --head-weight:    400;
  --head-italic:    italic;
  --head-tracking:  -0.02em;
  --kit-tracking:   0.01em;

  /* Palette */
  --bg-0: #0b0a09;
  --ink:       oklch(0.96 0.01 70);
  --ink-soft:  oklch(0.78 0.015 70);
  --ink-mute:  oklch(0.62 0.015 70);
  --ink-faint: oklch(0.48 0.012 70);

  /* Tokens */
  --radius:      26px;
  --radius-pill: 999px;
  --panel-w:     900px;

  /* Fonts */
  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --mono:  "Geist Mono", ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;

  --ease:     cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Atmosphere overrides */

/* Glass depth overrides */
[data-glass="mist"] {
  --glass-blur:     5px;
  --glass-sat:      125%;
  --glass-fill:     rgba(255,252,246,0.022);
  --glass-fill-hi:  rgba(255,252,246,0.04);
  --glass-edge:     rgba(255,248,235,0.08);
  --glass-edge-hi:  rgba(255,248,235,0.16);
  --glass-specular: 0.05;
}
[data-glass="heavy"] {
  --glass-blur:     28px;
  --glass-sat:      190%;
  --glass-fill:     rgba(255,252,246,0.09);
  --glass-fill-hi:  rgba(255,252,246,0.14);
  --glass-edge:     rgba(255,248,235,0.28);
  --glass-edge-hi:  rgba(255,248,235,0.50);
  --glass-specular: 0.20;
}

/* Type overrides */
[data-type="mono"] {
  --font-display:  "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --head-weight:   500;
  --head-italic:   normal;
  --head-tracking: -0.04em;
  --kit-tracking:  -0.01em;
}
[data-type="sans"] {
  --font-display:  -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  --head-weight:   300;
  --head-italic:   normal;
  --head-tracking: -0.04em;
  --kit-tracking:  -0.01em;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ============================================================
   Iron texture side panels — desktop only
   ============================================================ */
.side-iron {
  display: none;
}
@media (min-width: 940px) {
  .side-iron {
    display: block;
    position: fixed;
    top: 0; bottom: 0;
    z-index: -1;
    pointer-events: none;
    background-color: #1c1b1a;
    background-image:
      repeating-linear-gradient(
        89.4deg,
        transparent 0px, transparent 2px,
        rgba(255,255,255,0.02) 2px, rgba(255,255,255,0.02) 3px,
        transparent 3px, transparent 8px
      ),
      repeating-linear-gradient(
        180deg,
        rgba(0,0,0,0.06) 0px, rgba(0,0,0,0.06) 1px,
        transparent 1px, transparent 9px
      ),
      linear-gradient(172deg, #262422 0%, #171514 50%, #1e1c1a 100%);
  }
  .side-iron-l {
    left: 0;
    right: calc(50% + calc(var(--panel-w) / 2));
    box-shadow: inset -18px 0 36px rgba(0,0,0,0.55),
                inset -1px 0 0 rgba(255,255,255,0.05);
  }
  .side-iron-r {
    left: calc(50% + calc(var(--panel-w) / 2));
    right: 0;
    box-shadow: inset 18px 0 36px rgba(0,0,0,0.55),
                inset 1px 0 0 rgba(255,255,255,0.05);
  }
}

/* ============================================================
   Layout
   ============================================================ */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -2;
  background: radial-gradient(120% 90% at 50% -10%, #1c160f 0%, #14110d 38%, var(--bg-0) 100%);
  overflow: hidden;
}
[data-atmosphere="indigo"] .backdrop {
  background: radial-gradient(120% 90% at 50% -10%, #110d1e 0%, #0d0b16 38%, var(--bg-0) 100%);
}
[data-atmosphere="slate"] .backdrop {
  background: radial-gradient(120% 90% at 50% -10%, #0c1418 0%, #0b1014 38%, var(--bg-0) 100%);
}

.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
  will-change: transform;
  transition: background 1.2s var(--ease);
}
.aurora.a {
  width: 52vw; height: 52vw;
  left: -10vw; top: -8vw;
  background: radial-gradient(circle at 40% 40%, var(--aurora-a), transparent 65%);
  animation: drift-a 26s cubic-bezier(0.2,0.7,0.2,1) infinite alternate;
}
.aurora.b {
  width: 46vw; height: 46vw;
  right: -12vw; top: 8vw;
  background: radial-gradient(circle at 50% 50%, var(--aurora-b), transparent 65%);
  animation: drift-b 32s cubic-bezier(0.2,0.7,0.2,1) infinite alternate;
}
.aurora.c {
  width: 60vw; height: 60vw;
  left: 20vw; bottom: -30vw;
  background: radial-gradient(circle at 50% 50%, var(--aurora-c), transparent 62%);
  animation: drift-c 38s cubic-bezier(0.2,0.7,0.2,1) infinite alternate;
}
@keyframes drift-a { to { transform: translate3d(8vw, 10vh, 0) scale(1.15); } }
@keyframes drift-b { to { transform: translate3d(-9vw, 6vh, 0) scale(1.10); } }
@keyframes drift-c { to { transform: translate3d(6vw, -8vh, 0) scale(1.20); } }

/* SVG filter element */
.svg-filters { position: absolute; width: 0; height: 0; }

/* ============================================================
   Liquid glass material
   ============================================================ */
.glass {
  position: relative;
  background: var(--glass-fill);
  border: 1px solid var(--glass-edge);
  border-radius: var(--radius);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  box-shadow:
    0 1px 0 0 rgba(255,255,255,calc(var(--glass-specular) * 1.2)) inset,
    0 0 0 0.5px rgba(0,0,0,0.4),
    0 24px 60px -24px rgba(0,0,0,0.7),
    0 2px 18px -8px rgba(0,0,0,0.5);
  overflow: hidden;
  isolation: isolate;
  transition:
    background 0.9s var(--ease),
    border-color 0.9s var(--ease),
    box-shadow 0.9s var(--ease),
    backdrop-filter 0.9s var(--ease);
}
.glass::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  border-radius: inherit;
  background:
    radial-gradient(120% 80% at 12% 0%,
      rgba(255,255,255,calc(var(--glass-specular) * 1.6)),
      rgba(255,255,255,0) 45%),
    linear-gradient(180deg,
      rgba(255,255,255,calc(var(--glass-specular) * 0.7)) 0%,
      rgba(255,255,255,0) 22%);
  mix-blend-mode: screen;
  transition: opacity 0.6s var(--ease);
}
.glass > * { position: relative; z-index: 2; }

/* Interactive glass: cursor glow + lift */
.glass.interactive {
  transition:
    transform 0.5s var(--ease-out),
    box-shadow 0.5s var(--ease-out),
    border-color 0.5s var(--ease),
    background 0.9s var(--ease),
    backdrop-filter 0.9s var(--ease);
}
.glass.interactive:hover {
  transform: translateY(-4px);
  border-color: var(--glass-edge-hi);
  box-shadow:
    0 1px 0 0 rgba(255,255,255,calc(var(--glass-specular) * 1.8)) inset,
    0 0 0 0.5px rgba(0,0,0,0.4),
    0 40px 80px -30px rgba(0,0,0,0.8);
}

/* ============================================================
   Layout
   ============================================================ */
.page-panel {
  max-width: var(--panel-w);
  margin-inline: auto;
}
.wrap {
  padding-inline: clamp(20px, 5vw, 44px);
}
section { padding-block: clamp(64px, 10vw, 128px); }

.kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent-soft);
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  transition: color 0.9s var(--ease);
}
.kicker::before {
  content: "";
  width: 22px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: background 0.9s var(--ease);
}

.section-title {
  font-family: var(--font-display);
  font-weight: var(--head-weight);
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1.06;
  letter-spacing: var(--head-tracking);
  margin-top: 0.5rem;
  transition: font-family 0.5s var(--ease), letter-spacing 0.5s var(--ease);
}
.section-title .accent {
  color: var(--accent);
  font-style: var(--head-italic);
  transition: color 0.9s var(--ease), font-style 0.5s var(--ease);
}

/* ---- Nav ---- */
.nav {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(-130%);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 6px 8px;
  border-radius: var(--radius-pill);
  animation: nav-in 1s cubic-bezier(0.16,1,0.3,1) 0.3s forwards;
  white-space: nowrap;
}
@keyframes nav-in { to { transform: translateX(-50%) translateY(0); } }

.nav a.link {
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav a.link:hover { color: var(--ink); background: rgba(255,255,255,0.06); }
.nav a.link.hide-sm { display: none; }
.nav a.cta {
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--btn-primary-text);
  background: linear-gradient(180deg, var(--accent-soft), var(--accent));
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 1px 0 rgba(255,255,255,0.4) inset, 0 6px 18px -8px oklch(from var(--accent) l c h / 0.8);
  transition: transform 0.3s var(--ease), filter 0.3s var(--ease), background 0.9s var(--ease), color 0.9s var(--ease);
}
.nav a.cta:hover { transform: translateY(-1px); filter: brightness(1.06); }

@media (min-width: 720px) { .nav a.link.hide-sm { display: inline-flex; } }

/* ---- Hero ---- */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 80px;
  padding-bottom: 48px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: var(--head-weight);
  font-size: clamp(3.8rem, 16vw, 8.5rem);
  line-height: 0.92;
  letter-spacing: var(--head-tracking);
  margin: 0.2em 0 0;
  text-shadow: 0 0 90px oklch(from var(--accent) l c h / 0.25),
               0 0 10px oklch(from var(--accent) l c h / 0.15);
  transition: font-family 0.5s var(--ease), font-weight 0.5s var(--ease), letter-spacing 0.5s var(--ease);
}
.hero h1 .it {
  font-style: var(--head-italic);
  color: var(--accent);
  transition: color 0.9s var(--ease), font-style 0.5s var(--ease);
}
.lede {
  max-width: 50ch;
  font-size: clamp(1rem, 2.5vw, 1.28rem);
  color: var(--ink-soft);
  margin-top: 1.4rem;
  text-wrap: pretty;
}
.lede b { color: var(--ink); font-weight: 500; }
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 2.2rem;
}

/* Buttons */
.btn {
  font-family: var(--sans);
  font-size: 0.95rem;
  text-decoration: none;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  cursor: pointer;
  transition: transform 0.35s var(--ease-out), filter 0.3s var(--ease), border-color 0.3s var(--ease), background 0.9s var(--ease), color 0.9s var(--ease);
}
.btn-primary {
  color: var(--btn-primary-text);
  background: linear-gradient(180deg, var(--accent-soft), var(--accent));
  font-weight: 600;
  box-shadow: 0 1px 0 rgba(255,255,255,0.4) inset, 0 12px 30px -12px oklch(from var(--accent) l c h / 0.65);
}
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.06); }
.btn-ghost {
  color: var(--ink);
  background: var(--glass-fill);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--glass-edge-hi); }
.btn .arrow { transition: transform 0.4s var(--ease-out); }
.btn:hover .arrow { transform: translate(3px,-3px); }

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
  margin-top: 2.4rem;
}
.avatar-card { padding: 16px; }
.avatar-card .frame {
  border-radius: 18px;
  overflow: hidden;
  aspect-ratio: 1;
  position: relative;
  max-width: 280px;
}
.avatar-card .frame img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(0.12) contrast(1.02) saturate(1.04);
  transition: filter 0.6s var(--ease), transform 0.8s var(--ease-out);
}
.avatar-card:hover .frame img { filter: grayscale(0) contrast(1.04); transform: scale(1.03); }
.avatar-card .frame::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, oklch(0.18 0.03 55 / 0.6));
  mix-blend-mode: multiply;
}
.avatar-card .meta { margin-top: 14px; padding: 2px 4px; }
.avatar-card .meta .nm {
  font-family: var(--font-display);
  font-weight: var(--head-weight);
  font-size: 1.5rem; line-height: 1;
  transition: font-family 0.5s var(--ease);
}
.avatar-card .meta .hd {
  font-family: var(--mono);
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-mute); margin-top: 8px;
}

.prose {
  font-size: clamp(1rem, 2vw, 1.18rem);
  color: var(--ink-soft);
  max-width: 56ch;
  text-wrap: pretty;
}
.prose + .prose { margin-top: 1rem; }
.prose b { color: var(--ink); font-weight: 500; }

.skills { margin-top: 2rem; display: grid; gap: 14px; }
.skill-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}
.skill-row .lab {
  font-family: var(--mono);
  font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-mute);
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  color: var(--ink-soft);
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.chip:hover { transform: translateY(-2px); color: var(--ink); border-color: var(--glass-edge-hi); background: rgba(255,255,255,0.07); }
.chip-icon {
  width: 17px; height: 17px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}
.chip-icon.invert { filter: brightness(0) invert(0.85); }
svg.chip-icon { fill: rgba(255,255,255,0.75); }

/* ---- Projects ---- */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 2.4rem;
}
.project {
  padding: 28px 28px 24px;
  display: flex; flex-direction: column;
  min-height: 280px;
  text-decoration: none; color: inherit;
}
.project .top { display: flex; justify-content: space-between; align-items: center; }
.project .yr { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; color: var(--ink-mute); }
.project .idx {
  font-family: var(--mono); font-size: 0.7rem; color: var(--accent-soft);
  border: 1px solid var(--glass-edge); border-radius: var(--radius-pill);
  width: 30px; height: 30px; display: grid; place-items: center;
  transition: border-color 0.9s var(--ease), color 0.9s var(--ease);
}
.project h3 {
  font-family: var(--font-display);
  font-weight: var(--head-weight);
  font-size: clamp(1.7rem, 4vw, 2.2rem);
  line-height: 1.05;
  margin-top: 24px;
  letter-spacing: var(--head-tracking);
  transition: font-family 0.5s var(--ease), letter-spacing 0.5s var(--ease);
}
.project p { color: var(--ink-soft); margin-top: 10px; font-size: 0.97rem; max-width: 44ch; text-wrap: pretty; }
.project .foot {
  margin-top: auto; padding-top: 20px;
  display: flex; justify-content: space-between; align-items: flex-end; gap: 14px;
}
.project .stack { display: flex; flex-wrap: wrap; gap: 6px; }
.project .stack span {
  font-family: var(--mono); font-size: 0.66rem;
  color: var(--ink-mute); padding: 4px 9px;
  border-radius: 8px; background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
}
.project .open {
  flex: none; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--glass-edge); color: var(--ink);
  transition: background 0.4s var(--ease), color 0.4s var(--ease), transform 0.4s var(--ease-out), border-color 0.9s var(--ease);
}
.project:hover .open { background: var(--accent); color: var(--btn-primary-text); }
.project .open svg { transition: transform 0.4s var(--ease-out); }
.project:hover .open svg { transform: translate(2px,-2px); }

/* ---- Experience ---- */
.exp-list { margin-top: 2.4rem; display: grid; gap: 16px; }
.exp {
  padding: 24px 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}
.exp .role {
  font-family: var(--font-display);
  font-weight: var(--head-weight);
  font-size: 1.45rem; line-height: 1.1;
  transition: font-family 0.5s var(--ease);
}
.exp .role .tag {
  display: block; font-family: var(--mono); font-size: 0.66rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-soft); margin-top: 8px;
  transition: color 0.9s var(--ease);
}
.exp ul { list-style: none; display: grid; gap: 11px; }
.exp li {
  position: relative; padding-left: 22px;
  color: var(--ink-soft); font-size: 0.97rem; text-wrap: pretty;
}
.exp li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px -1px oklch(from var(--accent) l c h / 0.7);
  transition: background 0.9s var(--ease), box-shadow 0.9s var(--ease);
}

/* ---- Contact ---- */
.contact { text-align: center; }
.contact-card {
  padding: clamp(36px, 7vw, 66px) clamp(20px, 5vw, 48px);
  text-align: center;
}
.contact-card .big {
  font-family: var(--font-display);
  font-weight: var(--head-weight);
  font-size: clamp(2.2rem, 7vw, 4.6rem);
  line-height: 1.02; letter-spacing: var(--head-tracking);
  transition: font-family 0.5s var(--ease), letter-spacing 0.5s var(--ease);
}
.contact-card .big .it {
  font-style: var(--head-italic); color: var(--accent);
  transition: color 0.9s var(--ease), font-style 0.5s var(--ease);
}
.contact-card p { color: var(--ink-soft); max-width: 46ch; margin: 1.2rem auto 0; font-size: 1rem; text-wrap: pretty; }
.contact-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }

/* ---- Footer ---- */
.footer {
  padding: 36px 0 52px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 18px; flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer .sig { font-family: var(--font-display); font-size: 1.15rem; transition: font-family 0.5s var(--ease); }
.footer .sig b { color: var(--accent); font-weight: 400; transition: color 0.9s var(--ease); }
.footer .meta { font-family: var(--mono); font-size: 0.7rem; color: var(--ink-faint); letter-spacing: 0.08em; }
.footer .links { display: flex; gap: 18px; }
.footer .links a {
  color: var(--ink-mute); text-decoration: none; font-size: 0.85rem;
  min-height: 44px; display: inline-flex; align-items: center;
  transition: color 0.3s var(--ease);
}
.footer .links a:hover { color: var(--accent); }

/* ---- Desktop breakpoints ---- */
@media (min-width: 760px) {
  .about-grid { grid-template-columns: 260px 1fr; gap: 28px; }
  .avatar-card .frame { max-width: none; }
  .skill-row { grid-template-columns: 120px 1fr; gap: 16px; align-items: baseline; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .exp { grid-template-columns: 190px 1fr; gap: 26px; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .nav { transform: translateX(-50%); }
}