/* Project ATLAS - Site #6: Cronómetro Online (Spanish) */
:root {
  --bg-primary: #0a0f1d;
  --bg-surface: #111827;
  --bg-card: #1e293b;
  --border-subtle: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-emerald: #10b981;
  --accent-emerald-hover: #059669;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-blue: #38bdf8;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header */
header {
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  color: var(--accent-emerald);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

/* Tool Hero Section */
.tool-section {
  padding: 3rem 0;
  background: radial-gradient(circle at 50% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 60%);
}

.tool-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 1.5rem;
  padding: 2.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  text-align: center;
}

/* Mode Switcher Tabs */
.mode-tabs {
  display: inline-flex;
  background: var(--bg-primary);
  padding: 0.35rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border-subtle);
  margin-bottom: 2rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.6rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: var(--accent-emerald);
  color: #000;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

/* Digits Display */
.digits-container {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 11vw, 7.5rem);
  font-weight: 800;
  letter-spacing: -2px;
  color: #ffffff;
  padding: 2rem 1rem;
  background: #060913;
  border: 2px solid var(--border-subtle);
  border-radius: 1.25rem;
  margin-bottom: 1.5rem;
  user-select: none;
  text-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.digits-container .ms {
  font-size: 0.55em;
  color: var(--accent-emerald);
  margin-left: 0.25rem;
}

/* Action Controls */
.controls-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: 0.75rem;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform 0.1s ease, filter 0.2s ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-start {
  background: var(--accent-emerald);
  color: #022c1e;
  min-width: 140px;
}

.btn-start:hover {
  background: #34d399;
}

.btn-pause {
  background: var(--accent-amber);
  color: #451a03;
  min-width: 140px;
}

.btn-pause:hover {
  background: #fbbf24;
}

.btn-lap {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-lap:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.btn-reset {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.btn-reset:hover {
  border-color: var(--accent-rose);
  color: var(--accent-rose);
}

.btn-fullscreen {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
}

.btn-fullscreen:hover {
  color: #fff;
  border-color: #fff;
}

/* Countdown Presets */
.preset-pills {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.preset-pill {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  padding: 0.4rem 1.1rem;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.preset-pill:hover, .preset-pill.active {
  background: var(--accent-blue);
  color: #032030;
  font-weight: 600;
  border-color: var(--accent-blue);
}

/* Custom Countdown Form */
.countdown-inputs {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.input-group label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.num-input {
  background: #060913;
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  width: 4rem;
  text-align: center;
  padding: 0.5rem 0.25rem;
}

.num-input:focus {
  outline: none;
  border-color: var(--accent-emerald);
}

/* Laps Table */
.laps-wrapper {
  margin-top: 2rem;
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--border-subtle);
  border-radius: 0.75rem;
  background: #060913;
}

.laps-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.laps-table th, .laps-table td {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
}

.laps-table th {
  background: #0e1526;
  color: var(--text-secondary);
  font-weight: 600;
  font-family: var(--font-sans);
  position: sticky;
  top: 0;
}

.laps-table tr.fastest {
  color: var(--accent-emerald);
  font-weight: bold;
}

.laps-table tr.slowest {
  color: var(--accent-rose);
  font-weight: bold;
}

/* Fullscreen Mode */
body.is-fullscreen {
  background: #000;
  justify-content: center;
  align-items: center;
}

body.is-fullscreen header,
body.is-fullscreen footer,
body.is-fullscreen .content-section,
body.is-fullscreen .preset-pills,
body.is-fullscreen .countdown-inputs,
body.is-fullscreen .laps-wrapper {
  display: none !important;
}

body.is-fullscreen .tool-card {
  border: none;
  background: transparent;
  box-shadow: none;
  padding: 0;
}

body.is-fullscreen .digits-container {
  font-size: clamp(6rem, 22vw, 18rem);
  background: transparent;
  border: none;
  padding: 0;
  text-shadow: 0 0 40px rgba(16, 185, 129, 0.4);
}

/* Content & Editorial Layout */
.content-section {
  padding: 4rem 0;
}

.editorial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 1.25rem;
  padding: 2.5rem;
  margin-bottom: 2.5rem;
}

.editorial-card h2 {
  font-size: 1.75rem;
  color: #fff;
  margin-bottom: 1.25rem;
}

.editorial-card h3 {
  font-size: 1.3rem;
  color: var(--accent-emerald);
  margin: 1.75rem 0 0.75rem;
}

.editorial-card p, .editorial-card li {
  color: #cbd5e1;
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.editorial-card ul, .editorial-card ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.editorial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.feature-box h4 {
  color: #fff;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 3rem 0;
  margin-top: auto;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

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