/* SparkX Labs — Main Stylesheet */
/* Design: Dark tech/labs aesthetic with SparkX brand blues */

:root {
  --blue:       #1E5AA6;
  --blue-dark:  #174A8C;
  --blue-light: #2D6EC8;
  --green:      #22C55E;
  --green-dark: #16A34A;
  --bg:         #07090F;
  --bg-card:    #0E1220;
  --bg-nav:     rgba(7,9,15,0.92);
  --border:     rgba(255,255,255,0.07);
  --border-blue:rgba(30,90,166,0.35);
  --text:       #E8EDF5;
  --text-muted: #7A8BA6;
  --text-dim:   #4A5A70;
  --white:      #FFFFFF;
  --radius:     12px;
  --radius-sm:  8px;
  --shadow-card:0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow:0 0 40px rgba(30,90,166,0.2);
  --transition: all 0.22s cubic-bezier(0.4,0,0.2,1);
  --font-head:  'Poppins', sans-serif;
  --font-body:  'Inter', sans-serif;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── Typography ─────────────────────────────────────────── */
h1,h2,h3,h4,h5 { font-family: var(--font-head); font-weight: 700; line-height: 1.2; color: var(--white); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
p  { color: var(--text-muted); }

/* ── Layout ─────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section    { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.grid-2  { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3  { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4  { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.flex    { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2   { gap: 8px; }
.gap-3   { gap: 12px; }
.gap-4   { gap: 16px; }
.text-center { text-align: center; }
.mt-4    { margin-top: 16px; }
.mt-6    { margin-top: 24px; }
.mt-8    { margin-top: 32px; }
.mt-12   { margin-top: 48px; }
.mb-4    { margin-bottom: 16px; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--blue-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(30,90,166,0.4);
}
.btn-green {
  background: var(--green);
  color: #050A00;
}
.btn-green:hover {
  background: var(--green-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(34,197,94,0.35);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--blue);
  color: var(--white);
  background: rgba(30,90,166,0.1);
}
.btn-sm { padding: 8px 16px; font-size: 0.82rem; }
.btn-lg { padding: 15px 32px; font-size: 1rem; }

/* ── Navbar ──────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  height: 68px;
}
.navbar .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--white);
}
.nav-logo img { height: 32px; width: auto; }
.nav-logo .labs-badge {
  background: var(--blue);
  color: var(--white);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
  font-weight: 500;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.06);
}
.nav-cta { margin-left: 12px; }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  padding-top: 140px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(30,90,166,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30,90,166,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,90,166,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 100%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30,90,166,0.12);
  border: 1px solid var(--border-blue);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 0.8rem;
  color: #7AB4F5;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}
.hero-eyebrow .dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:0.5; transform:scale(1.4); }
}
.hero h1 { max-width: 780px; margin: 0 auto 20px; }
.hero h1 span { color: #5B9EE8; }
.hero-sub {
  max-width: 560px;
  margin: 0 auto 36px;
  font-size: 1.05rem;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.stat-item { text-align: center; }
.stat-num {
  font-family: var(--font-head);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.stat-num span { color: var(--green); }
.stat-label { font-size: 0.78rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 4px; }

/* ── Section header ──────────────────────────────────────── */
.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { font-size: 1.05rem; max-width: 560px; }
.section-header.center p { margin: 0 auto; }
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #7AB4F5;
  margin-bottom: 12px;
}

/* ── Project cards ───────────────────────────────────────── */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  border-color: var(--border-blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}
.card-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #0D1A2E 0%, #0E2040 100%);
  position: relative;
  overflow: hidden;
}
.card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.card-thumb-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.card-thumb-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(30,90,166,0.12), rgba(34,197,94,0.06));
}
.card-status {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 1;
}
.status-live    { background: rgba(34,197,94,0.15); color: #4ADE80; border: 1px solid rgba(34,197,94,0.3); }
.status-beta    { background: rgba(251,191,36,0.15); color: #FCD34D; border: 1px solid rgba(251,191,36,0.3); }
.status-coming  { background: rgba(148,163,184,0.1); color: #94A3B8; border: 1px solid rgba(148,163,184,0.2); }
.card-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.card-category {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #7AB4F5;
  margin-bottom: 8px;
}
.card-title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  line-height: 1.3;
}
.card-tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 16px;
}
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.tag {
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 100px;
  font-weight: 500;
  border: 1px solid;
}
.card-footer { display: flex; gap: 8px; border-top: 1px solid var(--border); padding-top: 16px; }
.card-footer .btn { flex: 1; justify-content: center; }

/* ── Filter bar ─────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}
.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
  text-decoration: none;
}
.filter-btn:hover {
  color: var(--white);
  border-color: var(--blue);
  background: rgba(30,90,166,0.1);
}
.filter-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
}

/* ── Featured section ────────────────────────────────────── */
.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  transition: var(--transition);
}
.featured-card:hover {
  border-color: var(--border-blue);
  box-shadow: var(--shadow-glow);
}
.featured-image {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #0D1A2E, #0E2040);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  border: 1px solid var(--border);
  overflow: hidden;
}
.featured-image img { width: 100%; height: 100%; object-fit: cover; }

/* ── CTA strip ───────────────────────────────────────────── */
.cta-strip {
  background: linear-gradient(135deg, #0B1628, #091A36);
  border: 1px solid var(--border-blue);
  border-radius: var(--radius);
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-strip::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(30,90,166,0.2) 0%, transparent 70%);
  pointer-events: none;
}
.cta-strip h2 { position: relative; margin-bottom: 16px; }
.cta-strip p  { position: relative; margin-bottom: 28px; max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-strip .btn { position: relative; }

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p {
  margin-top: 12px;
  font-size: 0.875rem;
  max-width: 260px;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-dim); }
.footer-bottom a { color: #7AB4F5; }

/* ── Project detail ──────────────────────────────────────── */
.project-hero {
  padding: 120px 0 60px;
  position: relative;
}
.project-hero-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 56px;
  align-items: start;
}
.project-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 20px;
}
.project-breadcrumb a:hover { color: var(--text); }
.project-breadcrumb .sep { color: var(--border); }
.project-meta-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: 88px;
}
.project-meta-card .btn { width: 100%; justify-content: center; margin-bottom: 10px; }
.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.meta-row:last-child { border-bottom: none; }
.meta-row .label { color: var(--text-dim); }
.meta-row .value { color: var(--text); font-weight: 500; }
.project-content { padding-bottom: 60px; }
.project-content h3 {
  font-size: 1.2rem;
  margin: 32px 0 12px;
  color: var(--white);
}
.project-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.75;
}
.project-content ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
}
.project-content ul li {
  color: var(--text-muted);
  margin-bottom: 6px;
  font-size: 0.93rem;
}
.project-image-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 32px;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #0D1A2E, #0E2040);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}
.project-image-wrap img { width: 100%; height: 100%; object-fit: cover; }

/* ── Changelog ───────────────────────────────────────────── */
.changelog {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  font-size: 0.85rem;
  font-family: 'Courier New', monospace;
  color: var(--text-muted);
  white-space: pre-wrap;
  margin-top: 16px;
}

/* ── Search box ──────────────────────────────────────────── */
.search-form {
  display: flex;
  gap: 0;
  max-width: 480px;
}
.search-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  padding: 10px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.search-input:focus { border-color: var(--blue); }
.search-input::placeholder { color: var(--text-dim); }
.search-btn {
  background: var(--blue);
  color: var(--white);
  border: 1px solid var(--blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 10px 18px;
  font-size: 0.9rem;
  transition: var(--transition);
}
.search-btn:hover { background: var(--blue-light); }

/* ── Empty state ─────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
}
.empty-icon { font-size: 3rem; margin-bottom: 16px; }
.empty-state h3 { color: var(--text); margin-bottom: 8px; }

/* ── Toast / alerts ──────────────────────────────────────── */
.alert {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.alert-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #4ADE80; }
.alert-error   { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #F87171; }

/* ── Related projects ────────────────────────────────────── */
.related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }

/* ── Page header (inner pages) ───────────────────────────── */
.page-header {
  padding: 120px 0 48px;
  position: relative;
  border-bottom: 1px solid var(--border);
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(30,90,166,0.06) 0%, transparent 100%);
  pointer-events: none;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .project-hero-grid { grid-template-columns: 1fr; }
  .project-meta-card { position: static; }
  .featured-card { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-strip { padding: 40px 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 56px 0; }

  /* Mobile nav overlay */
  .mobile-nav {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(7,9,15,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }
  .mobile-nav.open { display: flex; }
  .mobile-nav a {
    font-family: var(--font-head);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
  }
  .mobile-nav a:hover { color: var(--white); background: rgba(30,90,166,0.12); }
  .mobile-nav-close {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
  }
}

@media (min-width: 769px) {
  .mobile-nav { display: none !important; }
}