/* ================================================================
   PORTFOLIO WEBSITE — style.css
   Dark mode, glassmorphism cards, gradient accents, animations
   ================================================================ */

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

:root {
  --bg:          #080b12;
  --bg-card:     rgba(255,255,255,0.035);
  --bg-card-h:   rgba(255,255,255,0.07);
  --border:      rgba(255,255,255,0.09);
  --border-h:    rgba(139,92,246,0.5);
  --text:        #e2e8f0;
  --text-muted:  #64748b;
  --accent-1:    #8b5cf6;   /* violet */
  --accent-2:    #06b6d4;   /* cyan   */
  --accent-3:    #f472b6;   /* pink   */
  --gradient:    linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --radius:      16px;
  --radius-sm:   8px;
  --shadow:      0 8px 32px rgba(0,0,0,0.4);
  --shadow-h:    0 16px 48px rgba(139,92,246,0.25);
  --font-body:   'Inter', sans-serif;
  --font-display:'Outfit', sans-serif;
  --nav-h:       64px;
  --transition:  0.3s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Utility ───────────────────────────────────────────────────── */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.accent { color: var(--accent-1); }

/* ── Scrollbar ─────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent-1); border-radius: 3px; }

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(8,11,18,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--text); }

.nav-gh-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 40px;
  color: var(--text) !important;
  font-size: 0.85rem !important;
  background: var(--bg-card);
  transition: border-color var(--transition), background var(--transition) !important;
}

.nav-gh-btn:hover {
  border-color: var(--accent-1) !important;
  background: rgba(139,92,246,0.1) !important;
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + 40px) 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(139,92,246,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(6,182,212,0.10) 0%, transparent 60%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  animation: floatGlow 8s ease-in-out infinite;
}

.hero-glow-1 {
  width: 520px; height: 520px;
  background: var(--accent-1);
  top: -100px; left: -80px;
}

.hero-glow-2 {
  width: 400px; height: 400px;
  background: var(--accent-2);
  bottom: -80px; right: -60px;
  animation-delay: -4s;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%       { transform: translate(30px, -30px) scale(1.05); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s 0.1s forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s 0.25s forwards;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-muted);
  min-height: 2em;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s 0.4s forwards;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent-2);
  margin-left: 3px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s 0.55s forwards;
}

/* ── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(139,92,246,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139,92,246,0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent-1);
  background: rgba(139,92,246,0.08);
  transform: translateY(-2px);
}

/* ── Hero scroll hint ──────────────────────────────────────────── */
.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fadeIn 1s 1.2s forwards;
}

.hero-scroll-hint span {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent-1), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ================================================================
   ABOUT SECTION
   ================================================================ */
.about-section {
  padding: 80px 24px 20px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 48px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}

.about-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient);
}

.about-card .section-title {
  margin-bottom: 20px;
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  text-align: left;
}

.about-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .about-card {
    padding: 32px 24px;
  }
}

/* ================================================================
   PROJECTS SECTION
   ================================================================ */
.projects-section {
  padding: 100px 24px 120px;
}

.section-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ── Filter Bar ────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 28px;
}

.filter-btn {
  padding: 6px 18px;
  border-radius: 40px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--accent-1);
  color: var(--text);
}

.filter-btn.active {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
}

/* ── Search ────────────────────────────────────────────────────── */
.search-wrap {
  position: relative;
  max-width: 400px;
  margin: 0 auto 52px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 11px 16px 11px 42px;
  border-radius: 40px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.search-input:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(139,92,246,0.15);
}

/* ── Projects Grid ─────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

/* ── Project Card ──────────────────────────────────────────────── */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
  opacity: 0;
  animation: cardIn 0.5s forwards;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-h);
  background: var(--bg-card-h);
  box-shadow: var(--shadow-h);
}

/* staggered entrance */
.project-card:nth-child(1)  { animation-delay: 0.05s; }
.project-card:nth-child(2)  { animation-delay: 0.10s; }
.project-card:nth-child(3)  { animation-delay: 0.15s; }
.project-card:nth-child(4)  { animation-delay: 0.20s; }
.project-card:nth-child(5)  { animation-delay: 0.25s; }
.project-card:nth-child(6)  { animation-delay: 0.30s; }
.project-card:nth-child(7)  { animation-delay: 0.35s; }
.project-card:nth-child(8)  { animation-delay: 0.40s; }
.project-card:nth-child(9)  { animation-delay: 0.45s; }
.project-card:nth-child(n+10) { animation-delay: 0.5s; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Card Image ────────────────────────────────────────────────── */
.card-img-wrap {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
  display: block;
}

.project-card:hover .card-img {
  transform: scale(1.05);
}

.card-img-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg,
    rgba(139,92,246,0.3) 0%,
    rgba(6,182,212,0.3) 50%,
    rgba(244,114,182,0.2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-img-placeholder svg {
  opacity: 0.2;
  width: 48px;
  height: 48px;
}

/* ── Card Body ─────────────────────────────────────────────────── */
.card-body {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 10px;
}

.card-featured-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-1);
  padding: 3px 10px;
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.2);
  border-radius: 40px;
  align-self: flex-start;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text);
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-2);
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  border-radius: 4px;
  padding: 2px 8px;
}

.card-footer {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--accent-1);
  transition: gap var(--transition);
}

.project-card:hover .card-footer { gap: 10px; }

/* ── Empty state ───────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 80px 0;
  color: var(--text-muted);
}

.link-btn {
  background: none;
  border: none;
  color: var(--accent-1);
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
  text-decoration: underline;
  padding: 0;
}

/* ── Featured card top accent ──────────────────────────────────── */
.project-card.featured {
  border-top: 2px solid transparent;
  background-image:
    linear-gradient(var(--bg), var(--bg)),
    var(--gradient);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  border-top-color: var(--accent-1);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
}

.footer-inner { max-width: 1160px; margin: 0 auto; }

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer a {
  color: var(--accent-1);
  text-decoration: none;
  transition: color var(--transition);
}

.footer a:hover { color: var(--accent-2); }

/* ================================================================
   ANIMATIONS (shared)
   ================================================================ */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  to { opacity: 1; }
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
  .nav-links { gap: 20px; }

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

  .hero-cta { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .nav-logo { font-size: 1.1rem; }
  .nav-links li:not(:last-child) { display: none; }
  .section-header { margin-bottom: 36px; }
}