/* =========================================================
   RAJ KAHAR — PORTFOLIO REDESIGN
   Inter + Playfair Display · warm palette · selective glass
   ========================================================= */

:root {
  color-scheme: light;
  --bg: #faf7f2;
  --surface: #ffffff;
  --surface-soft: #f0ece6;
  --text: #1a0819;
  --muted: #6b5b6a;
  --accent: #b8863b;
  --accent-soft: rgba(184, 134, 59, 0.10);
  --border: rgba(26, 8, 25, 0.08);
  --glass: rgba(250, 247, 242, 0.75);
  --glass-border: rgba(26, 8, 25, 0.10);
  --shadow-md: 0 12px 40px rgba(30, 25, 20, 0.06);
  --radius-pill: 100px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Playfair Display", Georgia, serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #230c22;
  --surface: #3b153a;
  --surface-soft: #2e112d;
  --text: #f5eef5;
  --muted: #b9a8b7;
  --accent: #f0c987;
  --accent-soft: rgba(240, 201, 135, 0.10);
  --border: rgba(240, 201, 135, 0.16);
  --glass: rgba(59, 21, 58, 0.65);
  --glass-border: rgba(240, 201, 135, 0.16);
  --shadow-md: 0 12px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.65;
  font-weight: 350;
  overflow-x: hidden;
  transition: background-color 0.45s ease, color 0.45s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }
::selection { background: var(--accent); color: var(--bg); }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.75rem;
}
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h1 em { font-style: italic; color: var(--accent); }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); }
h3 { font-size: clamp(1.1rem, 1.8vw, 1.35rem); }

p { margin: 0 0 1rem; max-width: 62ch; }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6rem;
}

.text-muted { color: var(--muted); }

/* ---------- Container ---------- */
.section {
  width: min(100% - 2rem, 1120px);
  margin-inline: auto;
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.section-header {
  text-align: left;
  margin-bottom: 2rem;
  max-width: 640px;
}

/* ---------- Floating compact nav ---------- */
.nav {
  position: fixed;
  z-index: 1000;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, calc(100% - 2rem));
  min-height: 44px;
  padding: 0.3rem 0.3rem 0.3rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.4px;
  white-space: nowrap;
}
.brand span { color: var(--accent); }

.nav nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: auto;
}

.nav nav a {
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.25s ease, background-color 0.25s ease;
}
.nav nav a:hover,
.nav nav a.active {
  color: var(--text);
  background: var(--surface-soft);
}

.theme-toggle, .menu-toggle {
  border: 1px solid var(--glass-border);
  background: transparent;
  color: var(--text);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: background-color 0.25s ease;
}
.theme-toggle:hover, .menu-toggle:hover { background: var(--accent-soft); }
.menu-toggle { display: none; font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border);
  background: transparent;
  color: var(--text);
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn--glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
}

/* ---------- Project grid ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.project-card { min-width: 0; display: block; }

.project-media {
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  aspect-ratio: 16 / 10;
  margin: 0 0 1rem;
}
.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.25, 1, 0.5, 1);
}
.project-card:hover .project-media img { transform: scale(1.03); }

.project-meta { text-align: left; }
.project-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.35rem;
}
.project-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  margin: 0 0 0.35rem;
}
.project-desc {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 42ch;
  margin: 0 0 0.5rem;
}
.project-tags {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  margin: 0;
}

/* ---------- Feature grid (about page) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 2.5vw, 2rem);
}
.feature {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}
.feature .project-title { margin-bottom: 0.5rem; }
.feature p { margin-bottom: 0; }

/* ---------- Detail meta (project pages) ---------- */
.detail-meta {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2.5rem;
  align-items: start;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
  margin-top: 2rem;
}

/* ---------- Reveal on scroll ---------- */
.rv {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.rv.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav {
    width: calc(100% - 1.5rem);
    padding: 0.3rem 0.3rem 0.3rem 1rem;
    gap: 0.5rem;
  }

  .nav nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    padding: 0.5rem;
    margin-left: 0;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
  }
  .nav nav.open { display: flex; }
  .nav nav a { padding: 0.65rem 0.85rem; font-size: 0.85rem; }
  .menu-toggle { display: grid; }

  .project-grid { grid-template-columns: 1fr; gap: 2rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .detail-meta { grid-template-columns: 1fr; gap: 1.5rem; }

  h1 { font-size: clamp(1.75rem, 7vw, 2.25rem); }
  h2 { font-size: 1.35rem; }
}

@media (max-width: 420px) {
  .nav { top: 0.75rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}