/* ============================================================
   JOSE LUIS RAMIREZ — PORTFOLIO SITE
   Design System: Modern Professional (Teal/Navy + Inter)
   ============================================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-navy: #0A2540;
  --color-navy-mid: #0D3360;
  --color-teal: #0D7E9B;
  --color-teal-light: #1AABB0;
  --color-teal-pale: #E8F6F8;
  --color-gold: #E8A838;
  --color-white: #FFFFFF;
  --color-off-white: #F8F9FA;
  --color-gray-100: #F1F3F5;
  --color-gray-200: #E9ECEF;
  --color-gray-300: #DEE2E6;
  --color-gray-500: #868E96;
  --color-gray-700: #495057;
  --color-gray-900: #212529;
  --color-text: #1A1A2E;
  --color-text-muted: #5A6478;

  /* Typography */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 1.875rem;
  --font-size-3xl: 2.25rem;
  --font-size-4xl: 3rem;
  --font-size-5xl: 3.75rem;

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

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;

  /* Effects */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-teal: 0 4px 20px rgba(13, 126, 155, 0.25);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-off-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy);
}
h1 { font-size: var(--font-size-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-3xl); letter-spacing: -0.015em; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); font-weight: 600; }
h5 { font-size: var(--font-size-lg); font-weight: 600; }
p  { line-height: 1.75; color: var(--color-text-muted); }

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

.section { padding: var(--space-20) 0; }
.section--sm { padding: var(--space-12) 0; }
.section--lg { padding: var(--space-32) 0; }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.nav--transparent {
  background: transparent;
}

.nav--solid {
  background: rgba(10, 37, 64, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

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

.nav__logo {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav__logo span {
  color: inherit;
}

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

.nav__links a {
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: var(--transition-fast);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-teal-light);
  transform: scaleX(0);
  transition: var(--transition-fast);
  border-radius: 2px;
}

.nav__links a:hover { color: var(--color-white); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__links a.active { color: var(--color-white); }
.nav__links a.active::after { transform: scaleX(1); }

/* Dropdown */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  background: none;
  border: none;
  font-family: inherit;
}

.nav__dropdown-toggle:hover { color: var(--color-white); }

.nav__dropdown-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

.nav__dropdown.open .nav__dropdown-toggle svg { transform: rotate(180deg); }

.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 16px);
  right: 0;
  min-width: 220px;
  background: var(--color-navy);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: var(--space-2) 0;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: var(--transition-fast);
}

.nav__dropdown-menu::before {
  content: '';
  position: absolute;
  top: -16px;
  left: 0;
  right: 0;
  height: 16px;
  background: transparent;
}

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

@media (min-width: 769px) {
  .nav__dropdown:hover .nav__dropdown-menu {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
  }
}

.nav__dropdown-menu a {
  display: block;
  padding: var(--space-3) var(--space-5);
  color: rgba(255,255,255,0.8);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}

.nav__dropdown-menu a:hover {
  background: rgba(255,255,255,0.07);
  color: var(--color-white);
  padding-left: var(--space-6);
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* Mobile menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-navy);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-lg);
}

.nav__mobile.open { display: flex; }
.nav__mobile a { color: rgba(255,255,255,0.85); font-size: var(--font-size-md); font-weight: 500; padding: var(--space-2) 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
.nav__mobile a:last-child { border-bottom: none; }

/* --- Hero / Banner --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero--banner {
  min-height: 420px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 6s ease-out;
}

.hero--loaded .hero__bg { transform: scale(1); }

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 37, 64, 0.82) 0%,
    rgba(13, 51, 96, 0.70) 50%,
    rgba(13, 126, 155, 0.40) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  color: var(--color-white);
  padding: var(--space-32) var(--space-6) var(--space-20);
  max-width: 800px;
}

.hero__eyebrow {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal-light);
  background: rgba(13,171,176,0.15);
  border: 1px solid rgba(13,171,176,0.3);
  padding: var(--space-1) var(--space-4);
  border-radius: 100px;
  margin-bottom: var(--space-5);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, var(--font-size-5xl));
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, var(--font-size-xl));
  color: rgba(255,255,255,0.8);
  font-weight: 300;
  line-height: 1.4;
  margin-bottom: var(--space-10);
}

.hero__cta { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.8rem 2rem;
  border-radius: 100px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-teal);
  color: var(--color-white);
  box-shadow: var(--shadow-teal);
}
.btn--primary:hover {
  background: var(--color-teal-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(13,126,155,0.4);
}

.btn--outline {
  border: 2px solid rgba(255,255,255,0.6);
  color: var(--color-white);
}
.btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.btn--ghost {
  color: var(--color-teal);
  border: 2px solid var(--color-teal);
}
.btn--ghost:hover {
  background: var(--color-teal);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-navy);
  font-weight: 700;
}
.btn--gold:hover {
  background: #f0b84a;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(232,168,56,0.35);
}

.btn--back {
  color: var(--color-teal);
  font-weight: 600;
  font-size: var(--font-size-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: var(--transition-fast);
}
.btn--back:hover { color: var(--color-navy); gap: var(--space-3); }

/* --- Cards --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid rgba(0,0,0,0.04);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card__image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card__image { transform: scale(1.04); }

.card__image-wrap {
  overflow: hidden;
  height: 220px;
}

.card__body { padding: var(--space-6); }

.card__tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-teal);
  background: var(--color-teal-pale);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: var(--space-3);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.card__subtitle {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.card__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-5);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-teal);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: var(--transition-fast);
}
.card__link:hover { gap: var(--space-3); }
.card__link svg { width: 16px; height: 16px; }

/* Grid */
.grid { display: grid; gap: var(--space-8); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

/* --- Project Rows (Alternating Layout) --- */
.project-row {
  width: 100%;
  padding: var(--space-16) 0;
  display: flex;
  align-items: center;
}

.project-row:nth-of-type(odd) {
  background-color: var(--color-off-white);
}

.project-row:nth-of-type(even) {
  background-color: var(--color-white);
}

.project-row__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Alternate order on desktop */
.project-row:nth-of-type(even) .project-row__image-column {
  order: 2;
}

.project-row:nth-of-type(even) .project-row__text-column {
  order: 1;
}

/* Image container styling: white card frame, natural aspect ratios, shadow */
.project-row__image-wrap {
  background: var(--color-white);
  padding: var(--space-6);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.project-row__image-wrap:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-row__image-wrap img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

/* Text Container styling */
.project-row__text-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.project-row__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-navy);
  margin: 0;
}

.project-row__title a {
  color: inherit;
  transition: color var(--transition-fast);
}

.project-row__title a:hover {
  color: var(--color-teal);
}

.project-row__subtitle {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  text-transform: uppercase;
}

.project-row__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.project-row__btn {
  align-self: flex-start;
  display: inline-block;
  padding: 10px 24px;
  background-color: #245C8F;
  color: var(--color-white) !important;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: var(--transition-fast);
  margin-top: var(--space-3);
  box-shadow: var(--shadow-sm);
}

.project-row__btn:hover {
  background-color: #1b456f;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

@media (max-width: 1024px) {
  .project-row__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  /* Reset order for stacking on mobile */
  .project-row:nth-of-type(even) .project-row__image-column {
    order: 1;
  }
  .project-row:nth-of-type(even) .project-row__text-column {
    order: 2;
  }
  
  .project-row {
    padding: var(--space-12) 0;
  }
  
  .project-row__image-wrap {
    max-width: 500px;
    margin: 0 auto;
  }
}

/* --- Section Headers --- */
.section-header { text-align: center; margin-bottom: var(--space-12); }
.section-header__eyebrow {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-3);
}
.section-header__title { margin-bottom: var(--space-4); }
.section-header__subtitle { font-size: var(--font-size-md); max-width: 600px; margin: 0 auto; }

/* --- Intro Block (Home hook) --- */
.intro {
  background: var(--color-white);
  padding: var(--space-20) var(--space-6);
  text-align: center;
}

.intro__text {
  max-width: 680px;
  margin: 0 auto var(--space-8);
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* --- Footer --- */
.footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.footer__name {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.footer__email a {
  color: var(--color-teal-light);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}
.footer__email a:hover { color: var(--color-white); }

.footer__divider {
  width: 40px;
  height: 2px;
  background: var(--color-teal);
  margin: var(--space-5) auto;
  border-radius: 2px;
}

.footer__copy {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
  margin-top: var(--space-5);
}

/* --- About Page: Two-col bio --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.two-col--img-text {
  grid-template-columns: 400px 1fr;
  gap: var(--space-12);
  align-items: start;
}

/* --- Timeline --- */
.timeline { max-width: 720px; margin: 0 auto; }

.timeline__item {
  border-left: 2px solid var(--color-gray-200);
  padding-left: var(--space-8);
  padding-bottom: var(--space-8);
  position: relative;
  cursor: pointer;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-white);
  border: 3px solid var(--color-gray-300);
  transition: var(--transition-fast);
}

.timeline__item.active::before,
.timeline__item:hover::before {
  border-color: var(--color-teal);
  background: var(--color-teal);
}

.timeline__item.active { border-left-color: var(--color-teal); }

.timeline__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}

.timeline__date {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.timeline__title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-navy);
  flex: 1;
}

.timeline__chevron {
  width: 20px;
  height: 20px;
  color: var(--color-gray-500);
  transition: transform 0.25s;
  flex-shrink: 0;
}
.timeline__item.active .timeline__chevron { transform: rotate(180deg); }

.timeline__body {
  display: none;
  padding-top: var(--space-3);
}
.timeline__item.active .timeline__body { display: block; }

/* --- Credentials Grid --- */
.creds-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); }

.cred-block h5 {
  color: var(--color-teal);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-teal-pale);
}

.cred-list { display: flex; flex-direction: column; gap: var(--space-3); }

.cred-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-off-white);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-teal);
}

.cred-item__icon {
  color: var(--color-teal);
  flex-shrink: 0;
  margin-top: 1px;
}

.cred-item__text { font-size: var(--font-size-sm); color: var(--color-text); font-weight: 500; line-height: 1.5; }
.cred-item__text span { display: block; font-weight: 400; color: var(--color-text-muted); font-size: var(--font-size-xs); margin-top: 2px; }

/* --- Project Page: Essay --- */
.essay {
  background: var(--color-white);
  padding: var(--space-16) var(--space-24);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  max-width: 820px;
  margin: 0 auto;
}

.essay h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-navy);
  margin-bottom: var(--space-6);
}

.essay h3 {
  font-size: var(--font-size-xl);
  color: var(--color-teal);
  margin: var(--space-8) 0 var(--space-4);
}

.essay p { margin-bottom: var(--space-5); }

/* --- Project Detail Pages --- */
.project-section {
  padding: var(--space-16) 0;
}

.project-section + .project-section {
  border-top: 1px solid var(--color-gray-200);
}

.project-section--alt { background: var(--color-off-white); }

.project-section__inner {
  display: grid;
  gap: var(--space-12);
  align-items: start;
}

.project-section__inner--left { grid-template-columns: 1fr 1.2fr; }
.project-section__inner--right { grid-template-columns: 1.2fr 1fr; }
.project-section__inner--single { max-width: 760px; margin: 0 auto; }

.project-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-4);
}

.project-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--color-teal);
  border-radius: 2px;
}

.project-heading {
  font-size: var(--font-size-2xl);
  color: var(--color-navy);
  margin-bottom: var(--space-5);
}

.project-text { margin-bottom: var(--space-4); }

.project-highlight {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-mid) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-10);
  color: var(--color-white);
}

.project-highlight h3 { color: var(--color-white); margin-bottom: var(--space-6); }
.project-highlight p { color: rgba(255,255,255,0.8); }

.project-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
}
.project-image img { width: 100%; transition: transform 0.4s ease; }
.project-image:hover img { transform: scale(1.02); }

/* Deliverables box */
.deliverables-box {
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  border-left: 4px solid var(--color-teal);
}

.deliverables-box h3 { color: var(--color-navy); margin-bottom: var(--space-5); }

.deliverables-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.deliverables-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.6;
}

.deliverables-list li::before {
  content: '✓';
  color: var(--color-teal);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* Sub-items list */
.sub-list { margin-left: var(--space-4); margin-top: var(--space-2); }
.sub-list li {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: var(--space-1) 0;
  padding-left: var(--space-4);
  position: relative;
}
.sub-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 1.5px;
  background: var(--color-teal);
  border-radius: 2px;
}

/* --- Image Carousel --- */
.carousel {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.carousel__track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel__slide {
  min-width: 100%;
  position: relative;
}

.carousel__slide img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  cursor: pointer;
}

.carousel__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4) var(--space-5);
  background: linear-gradient(transparent, rgba(10,37,64,0.85));
  color: var(--color-white);
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

.carousel__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  color: var(--color-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
  z-index: 2;
}
.carousel__btn:hover { background: var(--color-white); transform: translateY(-50%) scale(1.08); }
.carousel__btn--prev { left: var(--space-3); }
.carousel__btn--next { right: var(--space-3); }
.carousel__btn svg { width: 18px; height: 18px; }

.carousel__dots {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-2);
  background: var(--color-navy);
}

.carousel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  transition: var(--transition-fast);
}
.carousel__dot.active { background: var(--color-teal-light); width: 20px; border-radius: 4px; }

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.lightbox.open { opacity: 1; pointer-events: all; }

.lightbox__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 80px rgba(0,0,0,0.5);
}

.lightbox__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: var(--transition-fast);
}
.lightbox__close:hover { background: rgba(255,255,255,0.2); }

/* --- Scroll Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }

/* --- Utility --- */
.text-center { text-align: center; }
.text-teal { color: var(--color-teal); }
.text-navy { color: var(--color-navy); }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--font-size-sm); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Back navigation */
.back-nav {
  padding: var(--space-6) 0 var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
  background: var(--color-white);
}

/* Footer CTA */
.footer-cta {
  text-align: center;
  padding: var(--space-20) var(--space-6);
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-mid) 100%);
  color: var(--color-white);
}
.footer-cta h2 { color: var(--color-white); margin-bottom: var(--space-4); }
.footer-cta p { color: rgba(255,255,255,0.75); max-width: 540px; margin: 0 auto var(--space-8); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .two-col--img-text { grid-template-columns: 1fr; }
  .project-section__inner--left,
  .project-section__inner--right { grid-template-columns: 1fr; }
  .essay { padding: var(--space-10) var(--space-10); }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  .grid--3 { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .creds-grid { grid-template-columns: 1fr; }
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .hero__content { padding: var(--space-24) var(--space-4) var(--space-16); }
  .essay { padding: var(--space-8) var(--space-6); }
  .project-highlight { padding: var(--space-6); }
  .section { padding: var(--space-12) 0; }
  .section--lg { padding: var(--space-16) 0; }
}

@media (max-width: 480px) {
  :root { --space-6: 1.25rem; }
  .hero__title { font-size: 2rem; }
  .hero__subtitle { font-size: 1rem; }
}