/* ==========================================================================
   Madeleine Guillery — Medical Visualization Artist
   Design System & Styles

   Aesthetic: Vintage anatomical plate warmth × modern scientific grid
   Inspired by: Classic medical illustration plates (Inspo 1 & 2)
                + systematic scientific catalog layout (Inspo 3)
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette — Warm cream base, anatomical-ink accents */
  --c-bg:            #F8F4EE;   /* Aged paper cream — main background */
  --c-bg-alt:        #F2EBE0;   /* Slightly deeper cream — alternate sections */
  --c-surface:       #FFFFFF;   /* Pure white — cards, overlays */
  --c-surface-tint:  #FDF9F5;   /* Barely-there cream — subtle card bg */

  --c-text:          #2A201C;   /* Very dark warm brown — primary text */
  --c-text-muted:    #7A6E68;   /* Medium warm gray — secondary text */
  --c-text-faint:    #B0A49E;   /* Light warm gray — captions, labels */

  --c-accent:        #7A3B2E;   /* Brick/rust — anatomical plate ink red */
  --c-accent-hover:  #5E2C22;   /* Deeper brick — hover state */
  --c-accent-light:  #F0E0DA;   /* Blush — accent light bg */

  --c-teal:          #3A6E6B;   /* Muted teal — secondary accent */
  --c-teal-light:    #D4E9E8;   /* Pale teal — teal light bg */

  --c-gold:          #B8895A;   /* Warm gold — decorative accents */

  --c-border:        #DDD5C8;   /* Warm beige — standard borders */
  --c-border-light:  #EDE8E1;   /* Light warm — subtle dividers */

  --c-dark:          #1A120F;   /* Near-black warm — dark sections */
  --c-dark-surface:  #251A16;   /* Dark warm surface — footer bg */

  /* Typography */
  --font-serif:  'Cormorant Garamond', 'Georgia', serif;
  --font-sans:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font Scale */
  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.875rem;   /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */
  --text-7xl:  4.5rem;     /* 72px */

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* Layout */
  --max-w:         1240px;
  --max-w-narrow:  800px;
  --nav-h:         72px;

  /* Transitions */
  --ease:          cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast:        0.15s var(--ease);
  --t-base:        0.25s var(--ease);
  --t-slow:        0.4s var(--ease);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(42, 32, 28, 0.08), 0 1px 2px rgba(42, 32, 28, 0.06);
  --shadow-md:  0 4px 12px rgba(42, 32, 28, 0.1), 0 2px 4px rgba(42, 32, 28, 0.06);
  --shadow-lg:  0 12px 32px rgba(42, 32, 28, 0.12), 0 4px 8px rgba(42, 32, 28, 0.08);

  /* Border radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Prevent hero decorative borders from creating horizontal scroll */
html { overflow-x: hidden; }

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

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

ul { list-style: none; }

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
}

/* --------------------------------------------------------------------------
   Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.container--narrow {
  max-width: var(--max-w-narrow);
}

.section {
  padding: var(--sp-24) 0;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: transparent;
  transition: background var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(248, 244, 238, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--c-border-light);
  box-shadow: var(--shadow-sm);
}

.nav__container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav__logo-name {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--c-text);
  line-height: 1.2;
}

.nav__logo-title {
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-text);
  transition: color var(--t-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--t-base);
}

.nav__link:hover { color: var(--c-accent); }
.nav__link:hover::after { width: 100%; }

.nav__link--cta {
  padding: var(--sp-2) var(--sp-5);
  border: 1.5px solid var(--c-accent);
  border-radius: var(--radius-sm);
  color: var(--c-accent);
  transition: background var(--t-fast), color var(--t-fast);
}

.nav__link--cta::after { display: none; }

.nav__link--cta:hover {
  background: var(--c-accent);
  color: var(--c-surface);
}

/* Active section highlight (set by JS on scroll) */
.nav__link--active {
  color: var(--c-accent);
}
.nav__link--active::after {
  width: 100%;
  background: var(--c-accent);
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-text);
  transition: transform var(--t-base), opacity var(--t-base);
}

.nav__toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  padding: var(--sp-6);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--t-base), opacity var(--t-base);
  pointer-events: none;
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.mobile-menu__links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.mobile-menu__link {
  font-size: var(--text-lg);
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--c-text);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--c-border-light);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--sp-4) var(--sp-8);
  border-radius: var(--radius-sm);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--c-accent);
  color: var(--c-surface);
  border: 1.5px solid var(--c-accent);
}

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

.btn--secondary {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
}

.btn--secondary:hover {
  border-color: var(--c-text);
}

.btn--ghost {
  background: transparent;
  color: var(--c-surface);
  border: 1.5px solid rgba(255,255,255,0.4);
}

.btn--ghost:hover {
  border-color: var(--c-surface);
  background: rgba(255,255,255,0.08);
}

/* --------------------------------------------------------------------------
   Section Headers (shared pattern)
   -------------------------------------------------------------------------- */
.section__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: var(--sp-3);
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin-bottom: var(--sp-4);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--c-text-muted);
  max-width: 520px;
  line-height: 1.6;
}

.section__header {
  margin-bottom: var(--sp-12);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  background: var(--c-bg);
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

/* Subtle background grid pattern — like graph paper on old plates */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border-light) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
  pointer-events: none;
}

.hero__container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--sp-20) var(--sp-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.hero__eyebrow::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--c-gold);
}

.hero__name {
  font-family: var(--font-serif);
  font-size: clamp(var(--text-5xl), 8vw, var(--text-7xl));
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.hero__tagline {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  font-style: italic;
  color: var(--c-text-muted);
  line-height: 1.4;
  border-left: 2px solid var(--c-accent);
  padding-left: var(--sp-4);
  margin: var(--sp-2) 0;
}

.hero__bio {
  font-size: var(--text-base);
  color: var(--c-text-muted);
  line-height: 1.75;
  max-width: 460px;
}

.hero__actions {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
  margin-top: var(--sp-2);
}

.hero__credentials {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--c-border);
}

.credential {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--sp-4);
  align-items: start;
}

.credential__label {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-faint);
  padding-top: 2px;
}

.credential__value {
  font-size: var(--text-sm);
  color: var(--c-text-muted);
  line-height: 1.5;
}

/* Hero Image Frame — styled like an anatomical plate illustration */
.hero__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__image-frame {
  position: relative;
  width: 100%;
  max-width: 500px;
  padding-bottom: var(--sp-8); /* room for caption below */
}

/* Double-border frame — like a plate mount */
.hero__image-frame::before {
  content: '';
  position: absolute;
  inset: -12px;
  border: 1px solid var(--c-border);
  pointer-events: none;
  z-index: 1;
}

.hero__image-frame::after {
  content: '';
  position: absolute;
  inset: -20px;
  border: 1px solid var(--c-border-light);
  pointer-events: none;
}

.hero__image-inner {
  position: relative;
  width: 100%;
  aspect-ratio: 4/5;
  overflow: hidden;
  background: var(--c-surface-tint);
  min-height: 200px; /* safety floor on small screens */
}

.hero__image-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Placeholder shown when no image is provided */
.hero__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--c-surface-tint);
  border: 2px dashed var(--c-border);
  gap: var(--sp-4);
  color: var(--c-text-faint);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  letter-spacing: 0.06em;
  text-align: center;
  padding: var(--sp-8);
}

.hero__placeholder small {
  display: block;
  margin-top: var(--sp-2);
  font-size: var(--text-xs);
  font-family: monospace;
  opacity: 0.6;
}

.hero__placeholder-icon {
  width: 64px;
  height: 64px;
  opacity: 0.3;
}

.hero__image-caption {
  display: block;
  text-align: center;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-faint);
  padding: var(--sp-3) 0 0;
  font-style: italic;
  font-family: var(--font-serif);
}

/* Plate number decoration */
.hero__plate-label {
  position: absolute;
  bottom: var(--sp-8);
  right: var(--sp-8);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--c-text-faint);
  letter-spacing: 0.08em;
}

/* --------------------------------------------------------------------------
   Portfolio
   -------------------------------------------------------------------------- */
.portfolio {
  background: var(--c-surface);
}

/* Filter tabs */
.portfolio__filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-10);
  padding-bottom: var(--sp-6);
  border-bottom: 1px solid var(--c-border-light);
}

.filter-btn {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--sp-2) var(--sp-5);
  border: 1px solid var(--c-border);
  border-radius: 100px;
  color: var(--c-text-muted);
  background: transparent;
  cursor: pointer;
  transition: all var(--t-fast);
}

.filter-btn:hover {
  border-color: var(--c-text-muted);
  color: var(--c-text);
}

.filter-btn.active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-surface);
}

/* Portfolio grid */
.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

/* Portfolio card */
.portfolio__item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  cursor: pointer;
  transition: opacity var(--t-base);
}

.portfolio__item.hidden {
  display: none;
}

.portfolio__item-image {
  position: relative;
  overflow: hidden;
  background: var(--c-bg-alt);
  aspect-ratio: 4/3;
}

.portfolio__item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow);
}

.portfolio__item:hover .portfolio__item-image img {
  transform: scale(1.04);
}

/* Placeholder for cards without images */
.portfolio__ph {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: transform var(--t-slow);
}

.portfolio__item:hover .portfolio__ph {
  transform: scale(1.04);
}

.portfolio__ph::after {
  content: attr(data-label);
  position: absolute;
  bottom: var(--sp-4);
  left: var(--sp-4);
  right: var(--sp-4);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
  text-align: center;
  letter-spacing: 0.06em;
}

/* Category color palettes for placeholders */
.ph--3d {
  background: linear-gradient(135deg, #3A4A5C 0%, #2C3A4A 50%, #4A3A3A 100%);
}
.ph--illustrations {
  background: linear-gradient(135deg, #6B4A3A 0%, #8B5C4A 50%, #5A4A6B 100%);
}
.ph--sketches {
  background: linear-gradient(135deg, #4A5C4A 0%, #5C6B5C 50%, #3A4A3A 100%);
}
.ph--animations {
  background: linear-gradient(135deg, #4A4A6B 0%, #5C5A8B 50%, #3A4A6B 100%);
}
.ph--thesis {
  background: linear-gradient(135deg, #6B5A3A 0%, #8B7A5C 50%, #5A4A2C 100%);
}

/* Hover overlay */
.portfolio__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 18, 15, 0.92) 0%, rgba(26, 18, 15, 0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--sp-5);
  opacity: 0;
  transition: opacity var(--t-base);
}

.portfolio__item:hover .portfolio__overlay {
  opacity: 1;
}

.portfolio__overlay-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--c-surface);
  line-height: 1.3;
  margin-bottom: var(--sp-1);
}

.portfolio__overlay-cat {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

/* Card info below image */
.portfolio__item-info {
  padding: 0 var(--sp-1);
}

.portfolio__item-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--c-text);
  margin-bottom: var(--sp-1);
}

.portfolio__item-caption {
  font-size: var(--text-xs);
  color: var(--c-text-faint);
  letter-spacing: 0.04em;
}

.portfolio__item-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--sp-2);
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about {
  background: var(--c-bg);
}

.about__grid {
  display: grid;
  grid-template-columns: 5fr 4fr;
  gap: var(--sp-16);
  align-items: start;
}

.about__content {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.about__intro {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.5;
  color: var(--c-text);
}

.about__body {
  font-size: var(--text-base);
  color: var(--c-text-muted);
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.about__quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-xl);
  color: var(--c-text);
  line-height: 1.5;
  padding: var(--sp-6);
  border-left: 3px solid var(--c-accent);
  background: var(--c-accent-light);
  margin: var(--sp-4) 0;
}

/* Skills / Education sidebar */
.about__sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-8);
  position: sticky;
  top: calc(var(--nav-h) + var(--sp-8));
}

.about__card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: var(--sp-6);
}

.about__card-title {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-faint);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--c-border-light);
}

.about__edu-item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.about__edu-degree {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--c-text);
  line-height: 1.3;
}

.about__edu-school {
  font-size: var(--text-sm);
  color: var(--c-text-muted);
}

.about__edu-detail {
  font-size: var(--text-xs);
  color: var(--c-text-faint);
  font-style: italic;
}

/* Skills list */
.skills-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.skill-item__label {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-item__name {
  font-size: var(--text-sm);
  color: var(--c-text);
  font-weight: 400;
}

.skill-item__level {
  font-size: var(--text-xs);
  color: var(--c-text-faint);
  letter-spacing: 0.06em;
}

.skill-item__bar {
  height: 2px;
  background: var(--c-border);
  border-radius: 100px;
  overflow: hidden;
}

.skill-item__fill {
  height: 100%;
  background: var(--c-accent);
  border-radius: 100px;
  transition: width 1s var(--ease);
}

/* Social links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--c-text-muted);
  transition: color var(--t-fast);
  padding: var(--sp-2) 0;
  border-bottom: 1px solid var(--c-border-light);
}

.social-link:last-child {
  border-bottom: none;
}

.social-link:hover {
  color: var(--c-accent);
}

.social-link__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.5;
}

.social-link:hover .social-link__icon {
  opacity: 1;
}

.social-link__handle {
  font-size: var(--text-xs);
  color: var(--c-text-faint);
  margin-left: auto;
  letter-spacing: 0.04em;
}

/* --------------------------------------------------------------------------
   Process
   -------------------------------------------------------------------------- */
.process {
  background: var(--c-bg-alt);
}

.process__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-8);
  position: relative;
}

/* Connecting line through steps */
.process__grid::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 14%;
  right: 14%;
  height: 1px;
  background: var(--c-border);
  z-index: 0;
}

.process__step {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  position: relative;
  z-index: 1;
}

.process__step-number {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-border);
  background: var(--c-bg-alt);
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--c-text-faint);
}

.process__step-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--c-text);
  line-height: 1.3;
}

.process__step-body {
  font-size: var(--text-sm);
  color: var(--c-text-muted);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   Availability Banner
   -------------------------------------------------------------------------- */
.availability {
  background: var(--c-accent);
  padding: var(--sp-8) 0;
}

.availability__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);
  flex-wrap: wrap;
}

.availability__text {
  color: var(--c-surface);
}

.availability__eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--sp-2);
}

.availability__headline {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--c-surface);
  line-height: 1.2;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact {
  background: var(--c-dark);
  padding: var(--sp-24) 0;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: start;
}

.contact__heading {
  font-family: var(--font-serif);
  font-size: clamp(var(--text-4xl), 5vw, var(--text-5xl));
  font-weight: 300;
  color: var(--c-surface);
  line-height: 1.1;
  margin-bottom: var(--sp-6);
}

.contact__subtext {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  margin-bottom: var(--sp-8);
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  margin-top: var(--sp-8);
  padding-top: var(--sp-8);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.contact__info-item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.contact__info-label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}

.contact__info-value {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
}

/* Contact form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.form-group label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

.form-group input,
.form-group textarea,
.form-group select {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--c-surface);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  padding: var(--sp-4);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--t-fast), background var(--t-fast);
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.2);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.08);
}

.form-group select option {
  background: var(--c-dark);
  color: var(--c-surface);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}

.contact__form-note {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
  margin-top: var(--sp-2);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--c-dark-surface);
  padding: var(--sp-10) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);
  flex-wrap: wrap;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.footer__name {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.6);
}

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.04em;
}

.footer__links {
  display: flex;
  gap: var(--sp-6);
}

.footer__link {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.3);
  text-transform: uppercase;
  transition: color var(--t-fast);
}

.footer__link:hover {
  color: rgba(255,255,255,0.7);
}

.footer__social {
  display: flex;
  gap: var(--sp-4);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 100px;
  color: rgba(255,255,255,0.4);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.footer__social-link:hover {
  color: rgba(255,255,255,0.8);
  border-color: rgba(255,255,255,0.3);
}

/* --------------------------------------------------------------------------
   Project Detail Page
   -------------------------------------------------------------------------- */
.project-hero {
  padding-top: calc(var(--nav-h) + var(--sp-16));
  padding-bottom: var(--sp-12);
  background: var(--c-bg);
}

.project-hero__back {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-text-muted);
  margin-bottom: var(--sp-8);
  transition: color var(--t-fast);
}

.project-hero__back:hover { color: var(--c-accent); }

.project-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-10);
  margin-top: var(--sp-8);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--c-border);
}

.project-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.project-hero__meta-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}

.project-hero__meta-value {
  font-size: var(--text-sm);
  color: var(--c-text);
  line-height: 1.4;
}

/* Full-plate hero image — same double-border "plate mount" language as .hero__image-frame */
.project-plate-frame {
  position: relative;
  padding-bottom: var(--sp-8);
}

.project-plate-frame::before {
  content: '';
  position: absolute;
  inset: -12px;
  border: 1px solid var(--c-border);
  pointer-events: none;
  z-index: 1;
}

.project-plate-frame::after {
  content: '';
  position: absolute;
  inset: -20px;
  border: 1px solid var(--c-border-light);
  pointer-events: none;
}

.project-plate-frame__inner {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--c-surface-tint);
}

.project-plate-frame__inner img {
  width: 100%;
  height: auto;
  display: block;
}

.project-plate-frame__caption {
  display: block;
  text-align: center;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-faint);
  padding: var(--sp-3) 0 0;
  font-style: italic;
  font-family: var(--font-serif);
}

/* Individual panel gallery */
.project-plate-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
}

.project-plate-grid__item img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  border: 1px solid var(--c-border);
}

.project-plate-grid__item figcaption {
  margin-top: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--c-text-muted);
  line-height: 1.5;
}

.project-plate-grid__num {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--c-accent);
  margin-right: var(--sp-2);
}

@media (max-width: 640px) {
  .project-plate-grid {
    grid-template-columns: 1fr;
  }
}

/* Sponsor / institution logo row on a project page */
.project-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: var(--sp-10);
  margin-top: var(--sp-8);
}

.project-logos img {
  max-height: 44px;
  width: auto;
  object-fit: contain;
}

/* Prominent sub-section heading within a project page (e.g. "Progress") */
.project-subhead {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--c-text);
  margin-bottom: var(--sp-8);
}

/* --------------------------------------------------------------------------
   Scroll Reveal Animation
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* --------------------------------------------------------------------------
   Responsive — Tablet (≤ 1024px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    gap: var(--sp-12);
    padding: var(--sp-16) var(--sp-6);
  }

  .hero__image {
    order: -1;
    justify-content: flex-start;
  }

  .hero__image-frame {
    max-width: 380px;
  }

  .hero__name {
    font-size: var(--text-5xl);
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-10);
  }

  .about__sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-6);
  }

  .portfolio__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-8);
  }

  .process__grid::before {
    display: none;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-10);
  }
}

/* --------------------------------------------------------------------------
   Responsive — Mobile (≤ 640px)
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  :root {
    --nav-h: 64px;
  }

  .nav__links { display: none; }
  .nav__toggle { display: flex; }

  .section { padding: var(--sp-16) 0; }

  .hero__container {
    padding: var(--sp-12) var(--sp-5);
  }

  .hero__name { font-size: var(--text-4xl); }
  .hero__tagline { font-size: var(--text-xl); }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    justify-content: center;
  }

  .credential {
    grid-template-columns: 1fr;
    gap: var(--sp-1);
  }

  .portfolio__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-5);
  }

  .portfolio__filters {
    gap: var(--sp-2);
  }

  .filter-btn {
    font-size: 10px;
    padding: var(--sp-2) var(--sp-3);
  }

  .about__sidebar {
    grid-template-columns: 1fr;
  }

  .process__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }

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

  .footer__inner {
    flex-direction: column;
    gap: var(--sp-5);
    text-align: center;
  }

  .footer__links { display: none; }

  .availability__inner {
    flex-direction: column;
    text-align: center;
  }
}