/* S3MANAGER — GitHub Pages tanıtım sitesi
   Renkler src/ui/qt/styles.py (WhatsApp-inspired) ile senkron */

:root {
  --wa-green: #00a884;
  --wa-green-bright: #25d366;
  --wa-green-dark: #075e54;
  --wa-green-hover: #06cf9c;
  --wa-error: #ea0038;
  --wa-bg: #0b141a;
  --wa-bg-panel: #151f26;
  --wa-bg-elevated: #243038;
  --wa-bg-hover: #2a3942;
  --wa-text: #e9edef;
  --wa-text-secondary: #aebac1;
  --wa-text-muted: #a0adb4;
  --wa-border: #3a4a54;
  --wa-border-subtle: #2a3942;

  --font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --transition: 0.2s ease;
  --nav-height: 64px;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--wa-text);
  background: var(--wa-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--wa-green-bright);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--wa-green-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--wa-green-bright);
  outline-offset: 2px;
}

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

/* ── Nav ── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 20, 26, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--wa-border-subtle);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: 1rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--wa-text);
  font-weight: 600;
  font-size: 1.1rem;
}

.nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--wa-text-secondary);
  font-size: 0.95rem;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--wa-border);
  color: var(--wa-text);
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
}

/* ── Buttons ── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--wa-green);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 168, 132, 0.35);
}

.btn-primary:hover {
  background: var(--wa-green-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 168, 132, 0.45);
}

.btn-secondary {
  background: var(--wa-bg-hover);
  color: var(--wa-text);
  border: 1px solid var(--wa-border);
}

.btn-secondary:hover {
  background: var(--wa-bg-elevated);
  color: var(--wa-text);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

/* ── Hero ── */

.hero {
  position: relative;
  padding: 4.5rem 0 5rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(0, 168, 132, 0.18), transparent),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(37, 211, 102, 0.08), transparent);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  position: relative;
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: rgba(0, 168, 132, 0.15);
  color: var(--wa-green-bright);
  border: 1px solid rgba(0, 168, 132, 0.35);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  font-weight: 700;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--wa-text-secondary);
  margin: 0 0 1.75rem;
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--wa-text-muted);
}

.hero-meta span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.hero-visual {
  position: relative;
}

.hero-screenshot {
  border-radius: var(--radius-lg);
  border: 1px solid var(--wa-border);
  box-shadow: var(--shadow);
  background: var(--wa-bg-panel);
}

.hero-screenshot img {
  border-radius: var(--radius-lg);
}

/* ── Sections ── */

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: var(--wa-bg-panel);
  border-top: 1px solid var(--wa-border-subtle);
  border-bottom: 1px solid var(--wa-border-subtle);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.75rem;
}

.section-header p {
  color: var(--wa-text-secondary);
  max-width: 36rem;
  margin: 0 auto;
}

/* ── Features ── */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--wa-bg-elevated);
  border: 1px solid var(--wa-border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

.feature-card:hover {
  border-color: rgba(0, 168, 132, 0.4);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(0, 168, 132, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

.feature-card p {
  color: var(--wa-text-secondary);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.55;
}

/* ── Gallery ── */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.gallery-item {
  background: var(--wa-bg-elevated);
  border: 1px solid var(--wa-border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.gallery-trigger {
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  width: 100%;
  display: block;
}

.gallery-trigger:focus-visible {
  outline: 2px solid var(--wa-green-bright);
  outline-offset: 2px;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
  background: var(--wa-bg-panel);
}

.gallery-caption {
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  color: var(--wa-text-secondary);
}

.gallery-caption strong {
  color: var(--wa-text);
}

/* ── Steps ── */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  counter-reset: step;
}

.step {
  text-align: center;
  position: relative;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--wa-green);
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.step p {
  color: var(--wa-text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

/* ── Download table ── */

.download-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--wa-border-subtle);
}

.download-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.download-table th,
.download-table td {
  padding: 0.85rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--wa-border-subtle);
}

.download-table th {
  background: var(--wa-bg-elevated);
  color: var(--wa-text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.download-table tr:last-child td {
  border-bottom: none;
}

.download-table td:first-child {
  font-weight: 500;
}

.download-note {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  background: rgba(255, 184, 0, 0.08);
  border: 1px solid rgba(255, 184, 0, 0.25);
  border-radius: var(--radius);
  color: var(--wa-text-secondary);
  font-size: 0.9rem;
}

/* ── Footer ── */

.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--wa-border-subtle);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand p {
  color: var(--wa-text-secondary);
  font-size: 0.9rem;
  margin: 0.75rem 0 0;
  max-width: 24rem;
}

.footer-links h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--wa-text-muted);
  margin: 0 0 0.75rem;
}

.footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 0.45rem;
}

.footer-links a {
  color: var(--wa-text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--wa-green-bright);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--wa-border-subtle);
  font-size: 0.85rem;
  color: var(--wa-text-muted);
}

/* ── Lightbox ── */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 95vw;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--wa-bg-hover);
  border: 1px solid var(--wa-border);
  color: var(--wa-text);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
}

/* ── Responsive ── */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-visual {
    order: -1;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--wa-bg-panel);
    border-bottom: 1px solid var(--wa-border-subtle);
    flex-direction: column;
    padding: 1rem;
    gap: 0.75rem;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

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

  .hero {
    padding: 3rem 0 3.5rem;
  }
}