/* ============================================
   CS92 Inc. — Portfolio Design System
   Fast, modern, contractor + agency hybrid
   ============================================ */

:root {
  --bg: #0a0b0f;
  --bg-elevated: #12141a;
  --bg-card: #181b24;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f0f1f5;
  --text-muted: #8b90a0;
  --accent: #1e69fd;
  --accent-glow: rgba(30, 105, 253, 0.35);
  --accent-warm: #ff6b4a;
  --gradient: linear-gradient(135deg, #1e69fd 0%, #0066ff 50%, #4d94ff 100%);
  --radius: 12px;
  --radius-lg: 20px;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --font-display: "Instrument Serif", Georgia, serif;
  --header-h: 72px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-w: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

::selection { background: var(--accent); color: #fff; }

/* ---- Typography ---- */
h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 600;
}

.display {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
}

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

/* ---- Layout ---- */
.container {
  width: min(var(--max-w), 100% - 2rem);
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-muted);
  max-width: 560px;
  font-size: 1.05rem;
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
}

.header.scrolled {
  background: rgba(10, 11, 15, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}

.logo-mark {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.logo-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.logo-name {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

.logo-name span {
  color: var(--accent);
}

.logo-tag {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.footer .logo-mark {
  width: 36px;
  height: 36px;
}

.footer .logo-name {
  font-size: 1.1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

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

.nav a.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  padding: 0.55rem 1.25rem;
  background: var(--text);
  color: var(--bg) !important;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem !important;
  transition: transform var(--transition), box-shadow var(--transition) !important;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.15);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--accent-glow);
}

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

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.btn-sm { padding: 0.55rem 1.15rem; font-size: 0.85rem; }

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

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: #1e69fd;
  top: -10%;
  right: -5%;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: #ff6b4a;
  bottom: 10%;
  left: -10%;
  animation-delay: -4s;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black, transparent);
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(91, 140, 255, 0.12);
  border: 1px solid rgba(91, 140, 255, 0.25);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.hero-stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.hero-stat span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---- Services ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.service-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(91, 140, 255, 0.3);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(91, 140, 255, 0.12);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---- Project Cards ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.35);
  border-color: rgba(255, 255, 255, 0.12);
}

.project-card-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  position: relative;
}

.project-card-image img,
.project-card-image .placeholder-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.project-card-body {
  padding: 1.5rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.12);
  color: var(--accent);
}

.tag.design { background: rgba(255, 107, 74, 0.12); color: var(--accent-warm); }
.tag.mobile { background: rgba(74, 222, 128, 0.12); color: #4ade80; }
.tag.ux { background: rgba(168, 85, 247, 0.12); color: #a855f7; }
.tag.graphics { background: rgba(251, 191, 36, 0.12); color: #fbbf24; }

.project-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition);
}

.project-link:hover { gap: 0.6rem; }

/* ---- Filters ---- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.filter-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.filter-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.15);
}

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

/* ---- Placeholder Images ---- */
.placeholder-img {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.15);
}

.placeholder-img[data-theme="blue"] { background: linear-gradient(135deg, #1e3a5f, #5b8cff); }
.placeholder-img[data-theme="purple"] { background: linear-gradient(135deg, #2d1b4e, #7c5cff); }
.placeholder-img[data-theme="coral"] { background: linear-gradient(135deg, #4a1f1a, #ff6b4a); }
.placeholder-img[data-theme="green"] { background: linear-gradient(135deg, #1a3a2a, #4ade80); }
.placeholder-img[data-theme="gold"] { background: linear-gradient(135deg, #3a2f1a, #fbbf24); }
.placeholder-img[data-theme="slate"] { background: linear-gradient(135deg, #1a1f2e, #64748b); }

/* ---- Project Detail ---- */
.project-hero {
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 3rem;
}

.project-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.project-meta-item label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.project-meta-item span {
  font-weight: 600;
  font-size: 0.95rem;
}

.project-gallery {
  display: grid;
  gap: 1rem;
  margin-bottom: 3rem;
}

.project-gallery-main {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.project-gallery-main img,
.project-gallery-main .placeholder-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.project-gallery-thumbs button {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid transparent;
  opacity: 0.6;
  transition: opacity var(--transition), border-color var(--transition);
}

.project-gallery-thumbs button.active,
.project-gallery-thumbs button:hover {
  opacity: 1;
  border-color: var(--accent);
}

.project-gallery-thumbs img,
.project-gallery-thumbs .placeholder-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-content {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
  align-items: start;
}

.project-content h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.project-content p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.project-content ul {
  list-style: disc;
  padding-left: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.project-content ul li { margin-bottom: 0.4rem; }

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.stack-item {
  padding: 0.45rem 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
}

.project-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.project-sidebar h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.project-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.project-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 45%;
  transition: color var(--transition);
}

.project-nav a:hover { color: var(--accent); }

.project-nav a span:first-child {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---- About / Resume ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-intro p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.skill-pill {
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
}

.timeline { margin-top: 2rem; }

.timeline-item {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 2rem;
  border-left: 2px solid var(--border);
}

.timeline-item:last-child { border-left-color: transparent; padding-bottom: 0; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline-item h4 { font-size: 1rem; margin-bottom: 0.2rem; }

.timeline-item .company {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.timeline-item .period {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.timeline-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---- Contact ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(91, 140, 255, 0.12);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-info-item h4 { font-size: 0.9rem; margin-bottom: 0.15rem; }
.contact-info-item p, .contact-info-item a { font-size: 0.9rem; color: var(--text-muted); }
.contact-info-item a:hover { color: var(--accent); }

.contact-form {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea { resize: vertical; min-height: 120px; }

/* ---- CTA Banner ---- */
.cta-banner {
  padding: 4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(91, 140, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.cta-banner h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
  position: relative;
}

.cta-banner p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  position: relative;
}

.cta-banner .btn { position: relative; }

/* ---- Footer ---- */
.footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

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

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.reveal.visible {
  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; }

/* Filter animation */
.project-card.hidden {
  display: none;
}

.project-card.fade-in {
  animation: fadeInUp 0.4s ease forwards;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Page Header ---- */
.page-header {
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 2rem;
}

.page-header h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin-bottom: 0.75rem;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .about-grid,
  .contact-grid,
  .project-content {
    grid-template-columns: 1fr;
  }

  .project-sidebar { position: static; }
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(10, 11, 15, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .menu-toggle { display: flex; }

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

  .hero-stats { gap: 1.5rem; }

  .cta-banner { padding: 2.5rem 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal { opacity: 1; transform: none; }
}