/* TDL · Portugal Tides — Nothing design language */

:root {
  --black: #000000;
  --surface: #111111;
  --border: #222222;
  --border-visible: #333333;
  --text-disabled: #666666;
  --text-secondary: #999999;
  --text-primary: #E8E8E8;
  --text-display: #FFFFFF;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  --max-width: 980px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--black);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.mono {
  font-family: "SF Mono", "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
}

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

/* ---------- Top bar ---------- */
.topbar {
  padding: var(--space-lg) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.brand strong {
  color: var(--text-display);
  font-weight: 400;
}

.nav {
  display: flex;
  gap: var(--space-lg);
}

.nav a {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.15s ease-out;
}

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

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-text h1 {
  font-size: 48px;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text-display);
  font-weight: 300;
  margin-bottom: var(--space-lg);
}

.hero-icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  margin-bottom: var(--space-lg);
  display: block;
}

.hero-text .tag {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  display: inline-block;
}

.hero-text p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  max-width: 520px;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border: 0.5px solid var(--text-display);
  color: var(--text-display);
  text-decoration: none;
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: all 0.15s ease-out;
}

.app-badge:hover {
  background: var(--text-display);
  color: var(--black);
}

.app-badge .arrow {
  font-family: -apple-system, sans-serif;
  font-size: 14px;
}

.hero-screenshot img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- Divider ---------- */
.divider {
  height: 0.5px;
  background: var(--border-visible);
  margin: var(--space-3xl) 0;
}

/* ---------- Features ---------- */
.section-label {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-xl);
  display: block;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl) var(--space-xl);
  padding: var(--space-2xl) 0;
}

.feature h3 {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--text-display);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  font-weight: 400;
}

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


/* ---------- Contact form ---------- */
.contact {
  padding: var(--space-3xl) 0;
  max-width: 560px;
}

.contact h2 {
  font-size: 32px;
  color: var(--text-display);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-lg);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.form-row label {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.form-row input,
.form-row textarea {
  background: transparent;
  border: none;
  border-bottom: 0.5px solid var(--border-visible);
  padding: var(--space-sm) 0;
  color: var(--text-display);
  font-family: "SF Mono", monospace;
  font-size: 14px;
  transition: border-color 0.15s ease-out;
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-bottom-color: var(--text-display);
}

.form-row textarea {
  min-height: 100px;
}

.submit-btn {
  background: transparent;
  border: 0.5px solid var(--text-display);
  color: var(--text-display);
  padding: var(--space-md) var(--space-xl);
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease-out;
}

.submit-btn:hover:not(:disabled) {
  background: var(--text-display);
  color: var(--black);
}

.submit-btn:disabled {
  border-color: var(--text-disabled);
  color: var(--text-disabled);
  cursor: not-allowed;
}

.form-message {
  margin-top: var(--space-md);
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  min-height: 20px;
}

.form-message.success { color: var(--text-display); }
.form-message.error { color: #D71921; }

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 0.5px solid var(--border);
  margin-top: var(--space-3xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-disabled);
  text-transform: uppercase;
}

.footer a {
  color: var(--text-disabled);
  text-decoration: none;
  margin-left: var(--space-lg);
  transition: color 0.15s ease-out;
}

.footer a:hover { color: var(--text-display); }

/* ---------- Legal page ---------- */
.legal {
  padding: var(--space-2xl) 0 var(--space-3xl);
  max-width: 720px;
}

.legal h1 {
  font-size: 40px;
  color: var(--text-display);
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xl);
}

.legal h2 {
  font-size: 20px;
  color: var(--text-display);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 0.5px solid var(--border);
}

.legal h2:first-of-type { border-top: none; padding-top: 0; }

.legal h3 {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  font-weight: 400;
}

.legal p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: var(--space-md);
  max-width: 640px;
}

.legal ul {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin: var(--space-sm) 0 var(--space-md) var(--space-lg);
}

.legal li { margin-bottom: var(--space-xs); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    padding: var(--space-2xl) 0;
  }

  .hero-text h1 { font-size: 36px; }

  .hero-screenshot {
    max-width: 280px;
    margin: 0 auto;
  }

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

  .footer {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .footer a { margin: 0 var(--space-sm); }
}