/* 3Meals — styles.css */
/* Design spec: issue #16 */

:root {
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-border: #E8E0D4;
  --color-text: #3D3530;
  --color-text-secondary: #7A6F64;
  --color-breakfast: #D4913B;
  --color-lunch: #5B8C5A;
  --color-dinner: #6B7FA6;
  --color-safety: #C2683C;
  --color-interactive: #5B8C5A;
  --color-interactive-hover: #4A7349;
  --radius: 8px;
  --max-width: 720px;
}

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

/* Base */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (max-width: 768px) {
  html { font-size: 17px; }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: 1.75rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.25rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }

p { margin-bottom: 0.75rem; }

a {
  color: var(--color-interactive);
  text-decoration: none;
}
a:hover { color: var(--color-interactive-hover); text-decoration: underline; }

ul, ol { padding-left: 1.25rem; margin-bottom: 0.75rem; }
li { margin-bottom: 0.35rem; }

/* ─── Header ─── */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.65rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header .site-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

.site-header nav a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-left: 1.25rem;
}
.site-header nav a:hover { color: var(--color-text); text-decoration: none; }

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text);
  cursor: pointer;
  padding: 0.25rem;
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
}

@media (max-width: 600px) {
  .hamburger { display: flex; }
  .site-header nav { display: none; }
  .site-header nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1.25rem;
  }
  .site-header nav.open a {
    margin: 0;
    padding: 0.65rem 0;
    display: block;
    font-size: 1rem;
    min-height: 48px;
    display: flex;
    align-items: center;
  }
}

/* ─── Footer ─── */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 1.25rem;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ─── Cards ─── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-safety {
  background: rgba(194, 104, 60, 0.06);
  border-left: 3px solid var(--color-safety);
}

.card-tips {
  background: rgba(91, 140, 90, 0.06);
  border-left: 3px solid var(--color-interactive);
}

/* ─── Badges ─── */
.badge {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  color: white;
  display: inline-block;
  vertical-align: middle;
}
.badge-breakfast { background: var(--color-breakfast); }
.badge-lunch { background: var(--color-lunch); }
.badge-dinner { background: var(--color-dinner); }
.badge-foundation { background: var(--color-text-secondary); }
.badge-all { background: var(--color-text); }

.tool-label {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-left: 0.5rem;
}

/* ─── Lesson Header ─── */
.lesson-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.lesson-top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.back-link {
  color: var(--color-text-secondary);
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}

.lesson-counter {
  color: var(--color-text-secondary);
}

.lesson-header h1 { margin-bottom: 0.4rem; }

.lesson-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ─── Two Column ─── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 500px) {
  .two-col { grid-template-columns: 1fr; gap: 1rem; }
}

/* ─── Steps ─── */
.steps {
  list-style: none;
  padding-left: 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  padding-left: 2.25rem;
  position: relative;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}
.steps li:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-interactive);
  width: 1.75rem;
  text-align: center;
}

/* ─── Checklists ─── */
.checklist {
  list-style: none;
  padding-left: 0;
}

.checklist li {
  padding: 0.4rem 0;
  padding-left: 1.75rem;
  position: relative;
  cursor: default;
}

.checklist.interactive li {
  cursor: pointer;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--color-border);
  border-radius: 3px;
  background: var(--color-surface);
}

.checklist.interactive li::before { top: 50%; transform: translateY(-50%); }

.checklist li.checked::before {
  background: var(--color-interactive);
  border-color: var(--color-interactive);
  /* Checkmark via CSS */
  content: "";
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.75.75 0 0 1 1.06-1.06L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 0.75rem;
}

.checklist li.checked {
  color: var(--color-text-secondary);
  text-decoration: line-through;
}

/* ─── Video Grid ─── */
.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .video-grid { grid-template-columns: 1fr 1fr; }
}

.video-embed {
  position: relative;
}

.video-embed .video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-border);
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: var(--radius);
}

.video-caption {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.35rem;
}

/* ─── Lesson Nav Footer ─── */
.lesson-nav {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.lesson-nav a {
  flex: 1;
  display: block;
  padding: 1rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  min-height: 48px;
}
.lesson-nav a:hover {
  border-color: var(--color-interactive);
  text-decoration: none;
}

.nav-prev { text-align: left; }
.nav-next { text-align: right; }

.lesson-nav .nav-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.2rem;
}
.lesson-nav .nav-title {
  display: block;
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.95rem;
}
.lesson-nav .nav-teaser {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}

@media (max-width: 500px) {
  .lesson-nav { flex-direction: column; }
}

/* ─── Index Page ─── */
.hero {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
}
.hero h1 { font-size: 2rem; margin-bottom: 0.25rem; }
.hero .tagline {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
}

/* Progress bar */
.progress-section {
  margin-bottom: 2rem;
}
.progress-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.35rem;
}
.progress-fill {
  height: 100%;
  background: var(--color-interactive);
  border-radius: 3px;
  transition: width 0.3s ease;
}
.progress-text {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* Phase sections */
.phase {
  margin-bottom: 2rem;
}
.phase-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--color-border);
}

/* Lesson cards on index */
.lesson-card {
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  text-decoration: none;
  min-height: 48px;
  transition: border-color 0.15s ease;
}
.lesson-card:hover {
  border-color: var(--color-interactive);
  text-decoration: none;
}

.lesson-card .lesson-num {
  font-weight: 600;
  color: var(--color-text-secondary);
  width: 2rem;
  flex-shrink: 0;
  font-size: 0.9rem;
}

.lesson-card .lesson-title {
  flex: 1;
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.95rem;
}

.lesson-card .lesson-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.lesson-card .lesson-tool {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.lesson-card.completed .lesson-num {
  color: var(--color-interactive);
}
.lesson-card.completed .lesson-num::after {
  content: " \2713";
}

/* Kitchen tools table */
.tools-table {
  margin-top: 2rem;
}
.tools-table table {
  width: 100%;
  border-collapse: collapse;
}
.tools-table th, .tools-table td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.tools-table th {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
}

/* ─── Print ─── */
@media print {
  .site-header, .site-footer, .lesson-nav,
  .video-grid, .progress-section, .back-link,
  .lesson-counter, .hamburger { display: none; }

  body { background: white; color: black; font-size: 12pt; }
  .card { border: 1px solid #ccc; break-inside: avoid; }
  .card-safety { background: #fff5f0; }
  .card-tips { background: #f0fff0; }
}