/* ============================================
   style.css — Shared styles for all pages
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* --- CSS Variables --- */
:root {
  --bg:           #0f1117;
  --bg-secondary: #181c27;
  --surface:      #1e2335;
  --surface-2:    #252a3d;
  --border:       #2e3452;
  --text:         #e8eaf0;
  --text-muted:   #8892aa;
  --accent:       #38bdf8;
  --accent-dark:  #0ea5e9;
  --accent-glow:  rgba(56, 189, 248, 0.25);
  --gradient:     linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  --nav-height:   68px;
  --radius:       12px;
  --shadow:       0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg:    0 8px 40px rgba(0, 0, 0, 0.5);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover { color: #7dd3fc; text-decoration: none; }

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

/* --- Layout --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============================================
   NAVIGATION
   ============================================ */
nav {
  height: var(--nav-height);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 28px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 800;
  font-size: 1.05rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 8px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 8px;
  transition: all 0.2s;
}

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

.nav-links a.active {
  color: var(--accent);
  background-color: rgba(56, 189, 248, 0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text);
  transition: all 0.3s;
  border-radius: 2px;
}

/* ============================================
   PAGE HEADER (inner pages)
   ============================================ */
.page-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 56px;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.page-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  text-decoration: none;
  font-family: inherit;
  border: none;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(56, 189, 248, 0.45);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  transform: translateY(-2px);
  color: var(--accent);
}

/* ============================================
   CARDS (shared across pages)
   ============================================ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.25s;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
  transform: translateY(-3px);
}

/* ============================================
   TAGS / BADGES
   ============================================ */
.tag {
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 36px 28px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 100px;
  background: var(--bg-secondary);
}

footer a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 8px 12px 16px;
  }

  .nav-links.open { display: flex; }

  .nav-links li a { display: block; padding: 10px 14px; }

  .page-header h1 { font-size: 1.75rem; }
}