/* ── Design Tokens ─────────────────────────────────────── */

:root {
  --color-bg: #0a0a0a;
  --color-surface: #1a1a1a;
  --color-surface-hover: #222;
  --color-border: #2a2a2a;
  --color-text: #f5f5f7;
  --color-text-secondary: #86868b;
  --color-accent: #0A84FF;
  --color-accent-hover: #409CFF;
  --color-success: #30D158;
  --color-error: #FF453A;
  --color-warn: #FFD60A;

  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, sans-serif;
  --font-mono: 'SF Mono', ui-monospace, 'Cascadia Code', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 100px;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl: 120px;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 500ms ease;

  --max-width: 1120px;
}

/* ── Reset ─────────────────────────────────────────────── */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button, input {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

/* ── Utility ───────────────────────────────────────────── */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ── Nav ───────────────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-cta {
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-accent-hover);
}

/* ── Hero ──────────────────────────────────────────────── */

.hero {
  padding: var(--space-2xl) 0 var(--space-xl);
  padding-top: calc(var(--space-2xl) + 56px);
  text-align: center;
}

.hero-headline {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: clamp(17px, 2vw, 21px);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  line-height: 1.5;
}

/* ── Buttons ───────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  transform: scale(1.03);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  padding: 14px 32px;
  font-size: 17px;
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 24px rgba(10, 132, 255, 0.3);
}

/* ── Terminal Mockup ───────────────────────────────────── */

.terminal {
  max-width: 640px;
  margin: var(--space-lg) auto 0;
  background: #111;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-align: left;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.terminal-lg {
  max-width: 720px;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: #1a1a1a;
  border-bottom: 1px solid var(--color-border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #FF5F57; }
.terminal-dot.yellow { background: #FFBD2E; }
.terminal-dot.green { background: #28C840; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  margin-right: 38px;
}

.terminal-body {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
}

.terminal-line {
  white-space: pre;
}

.terminal-spacer {
  height: 12px;
}

.terminal-prompt {
  color: var(--color-success);
  margin-right: 8px;
}

.terminal-output {
  color: var(--color-text-secondary);
}

.terminal-dim {
  color: #666;
}

.terminal-accent {
  color: var(--color-accent);
}

.terminal-warn {
  color: var(--color-warn);
}

/* Typewriter cursor */
.terminal-typed::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--color-text);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

.terminal-typed.done::after {
  display: none;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ── Features ──────────────────────────────────────────── */

.features {
  padding: var(--space-xl) 0;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: var(--space-sm);
}

.section-sub {
  font-size: 17px;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 560px;
  margin: 0 auto var(--space-lg);
}

.section-sub code {
  font-family: var(--font-mono);
  font-size: 15px;
  background: var(--color-surface);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  border-color: rgba(10, 132, 255, 0.3);
  box-shadow: 0 0 30px rgba(10, 132, 255, 0.08);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 132, 255, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.feature-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ── Showcase ──────────────────────────────────────────── */

.showcase {
  padding: var(--space-xl) 0;
  text-align: center;
}

/* ── Security ──────────────────────────────────────────── */

.security {
  padding: var(--space-xl) 0;
}

.security-inner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
}

.security-inner .section-title {
  margin-bottom: var(--space-md);
}

.security-text {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-md);
  line-height: 1.6;
}

.security-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
}

.badge {
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  background: rgba(10, 132, 255, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(10, 132, 255, 0.2);
  border-radius: var(--radius-full);
}

/* ── Signup ─────────────────────────────────────────────── */

.signup {
  padding: var(--space-xl) 0;
  text-align: center;
}

.signup-form {
  max-width: 480px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  gap: var(--space-xs);
}

.form-input {
  flex: 1;
  padding: 14px 20px;
  font-size: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.form-input::placeholder {
  color: #555;
}

.form-input:focus {
  border-color: var(--color-accent);
}

.btn-submit {
  flex-shrink: 0;
  position: relative;
}

.btn-submit .btn-loading {
  display: none;
}

.btn-submit.loading .btn-text {
  visibility: hidden;
}

.btn-submit.loading .btn-loading {
  display: flex;
  position: absolute;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-message {
  margin-top: var(--space-sm);
  font-size: 14px;
  min-height: 20px;
}

.form-message.success {
  color: var(--color-success);
}

.form-message.error {
  color: var(--color-error);
}

/* ── Footer ────────────────────────────────────────────── */

.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-text {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ── Scroll Reveal ─────────────────────────────────────── */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 640px) {
  .form-group {
    flex-direction: column;
  }

  .btn-submit {
    width: 100%;
  }

  .terminal-body {
    font-size: 11px;
    padding: 12px;
    overflow-x: auto;
  }

  .security-inner {
    padding: var(--space-md);
  }
}