/* ============================================================
   main.css — CSS Variables, Reset, Typography, Layout
   PromptLab | LIFT LAB Workshop 2026
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --bg-primary:    #0a0e1a;
  --bg-secondary:  #0f1628;
  --bg-card:       rgba(255,255,255,0.04);
  --accent-maroon: #862633;
  --accent-maroon-light: #a83040;
  --accent-cyber:  #00d4ff;
  --accent-cyber-dim: rgba(0,212,255,0.15);
  --accent-gold:   #f0c040;
  --text-primary:  #f0f4ff;
  --text-secondary:#a0aabf;
  --text-muted:    #5a6380;
  --border:        rgba(255,255,255,0.08);
  --border-hover:  rgba(0,212,255,0.3);
  --glass:         rgba(255,255,255,0.04);
  --glass-border:  rgba(255,255,255,0.08);
  --shadow-glow:   0 0 30px rgba(0,212,255,0.12);
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;
  --transition:    0.25s cubic-bezier(0.4,0,0.2,1);
  --font-body:     'Inter', sans-serif;
  --font-code:     'JetBrains Mono', monospace;
  --max-width:     1200px;
  --header-h:      64px;

  /* Tool colors */
  --chatgpt-color: #10a37f;
  --claude-color:  #d97706;
  --gemini-color:  #4285f4;
  --copilot-color: #6e5494;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  font-size: 16px;
}

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

img, svg { display: block; max-width: 100%; }
a { color: var(--accent-cyber); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }
button { cursor: pointer; font-family: var(--font-body); }
ul, ol { list-style: none; }
input, textarea, select { font-family: var(--font-body); }

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

section:nth-child(even) {
  background: var(--bg-secondary);
}

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p { color: var(--text-secondary); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.text-accent  { color: var(--accent-cyber); }
.text-maroon  { color: var(--accent-maroon-light); }
.text-gold    { color: var(--accent-gold); }
.text-muted   { color: var(--text-muted); }
.text-center  { text-align: center; }

code, pre {
  font-family: var(--font-code);
  font-size: 0.875rem;
}

code {
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-cyber);
}

/* ── Section Headers ────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyber);
  background: var(--accent-cyber-dim);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-cyber);
  color: var(--bg-primary);
}
.btn-primary:hover {
  background: #fff;
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,212,255,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent-cyber);
  color: var(--accent-cyber);
  transform: translateY(-2px);
}

.btn-maroon {
  background: var(--accent-maroon);
  color: #fff;
}
.btn-maroon:hover {
  background: var(--accent-maroon-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(134,38,51,0.4);
}

.btn-sm { padding: 8px 16px; font-size: 0.8rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 16px 32px; font-size: 1rem; border-radius: var(--radius-lg); }

/* ── Glass Cards ────────────────────────────────────────────── */
.card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* ── Navigation ─────────────────────────────────────────────── */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(10,14,26,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}

#header.scrolled {
  background: rgba(10,14,26,0.97);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyber);
  box-shadow: 0 0 8px var(--accent-cyber);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

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

.nav-cta {
  background: var(--accent-cyber) !important;
  color: var(--bg-primary) !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: #fff !important;
}

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

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── Scroll Animations ──────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Footer ─────────────────────────────────────────────────── */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0;
  text-align: center;
}

.footer-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-logos img {
  height: 40px;
  opacity: 0.7;
  filter: brightness(1.2);
  transition: opacity var(--transition);
}
.footer-logos img:hover { opacity: 1; }

.footer-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* ── Toast ──────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #1a2040;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-cyber);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  animation: slideIn 0.3s ease;
  max-width: 320px;
}

.toast.success { border-left-color: #22c55e; }
.toast.error   { border-left-color: #ef4444; }
.toast.warning { border-left-color: var(--accent-gold); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  section { padding: 64px 0; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    background: rgba(10,14,26,0.98);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
  }
  .nav-links.open a { width: 100%; padding: 10px 16px; }
  .hamburger { display: flex; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
}