/* ============================================================
   Kytka do školy — v3 Forest / Dark Sidebar
   Font: DM Sans
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap');

/* ── Design tokens ── */
:root {
  --color-primary:       #4CAF82;
  --color-primary-dark:  #3A9068;
  --color-primary-light: #C8F0DC;
  --color-accent:        #FFC947;
  --color-text:          #111827;
  --color-text-muted:    #6B7280;
  --color-bg:            #FFFFFF;
  --color-bg-alt:        #F3F4F6;
  --color-bg-dark:       #0F2419;
  --color-border:        #E5E7EB;
  --color-sidebar:       #1B3A28;
  --color-sidebar-border:transparent;

  --font-sans: 'DM Sans', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --sidebar-width: 260px;
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  min-width: 1440px;
  display: flex;
  min-height: 100vh;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Layout ── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar);
  border-right: var(--color-sidebar-border);
  display: flex;
  flex-direction: column;
  padding: 2rem 1.25rem;
  z-index: 100;
  overflow-y: auto;
}

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  background: var(--color-bg);
}

/* ── Sidebar brand ── */
.sidebar-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0.5rem;
}

.sidebar-brand .brand-dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.sidebar-brand .brand-sub {
  display: block;
  font-size: 0.68rem;
  font-weight: 400;
  color: rgba(255,255,255,0.45);
  margin-top: 0.15rem;
}

/* ── Sidebar section label ── */
.sidebar-section-label {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  padding: 1rem 0.5rem 0.5rem;
}

/* ── Sidebar nav ── */
.sidebar-nav {
  flex: 1;
}

.sidebar-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255,255,255,0.55);
  transition: background var(--transition), color var(--transition);
  position: relative;
}

.sidebar-nav a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--color-primary);
  border-radius: 0 2px 2px 0;
  transition: height var(--transition);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: rgba(76, 175, 130, 0.12);
  color: var(--color-primary);
}

.sidebar-nav a:hover::before,
.sidebar-nav a.active::before {
  height: 60%;
}

.sidebar-nav a .nav-icon {
  font-size: 1rem;
  width: 1.1rem;
  text-align: center;
  flex-shrink: 0;
}

/* ── Sidebar CTA ── */
.sidebar-cta {
  margin-top: 1.75rem;
  display: block;
  background: var(--color-primary);
  color: var(--color-bg-dark);
  font-weight: 700;
  font-size: 0.88rem;
  text-align: center;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  transition: background var(--transition);
  letter-spacing: 0.01em;
}

.sidebar-cta:hover {
  background: #5BC994;
}

/* ── Sidebar user card ── */
.sidebar-user {
  margin-top: 1rem;
  padding: 0.85rem;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: background var(--transition);
}

.sidebar-user:hover { background: rgba(255,255,255,0.09); }

.sidebar-user-avatar {
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-bg-dark);
  flex-shrink: 0;
}

.sidebar-user-info .name { font-size: 0.82rem; font-weight: 700; color: #fff; }
.sidebar-user-info .role { font-size: 0.7rem; color: rgba(255,255,255,0.4); }

/* ── Sidebar back link ── */
.sidebar-back {
  margin-top: 1rem;
  display: block;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
  text-align: center;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}

.sidebar-back:hover { color: var(--color-primary); }

/* ── Section base ── */
section {
  padding: 5rem 4rem;
}

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

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 520px;
  line-height: 1.75;
}

/* ── Hero ── */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 5rem 4rem;
  gap: 4rem;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-border);
}

.hero-text {
  flex: 1;
  max-width: 580px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 2rem;
  border: 1px solid var(--color-border);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-heading {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.hero-heading .accent {
  color: var(--color-primary);
}

.hero-heading .underline-accent {
  position: relative;
  display: inline-block;
}

.hero-heading .underline-accent::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}

.hero-perex {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 460px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.9rem 1.75rem;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition);
  display: inline-block;
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  transition: border-color var(--transition), color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-ghost:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.hero-metrics {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  width: fit-content;
}

.hero-metric {
  padding: 1rem 1.75rem;
  border-right: 1px solid var(--color-border);
}

.hero-metric:last-child { border-right: none; }

.hero-metric-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  letter-spacing: -0.02em;
}

.hero-metric-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

/* ── Hero visual ── */
.hero-visual {
  flex: 0 0 420px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-main-card {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 260px;
  position: relative;
  overflow: hidden;
}

.hero-main-card::before {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(76,175,130,0.2) 0%, transparent 70%);
}

.hero-main-card-emoji {
  font-size: 4rem;
  line-height: 1;
}

.hero-main-card-label {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  text-align: center;
}

.hero-main-card-sub {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  text-align: center;
}

.hero-card-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--color-primary);
  color: var(--color-bg-dark);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.hero-sub-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.hero-sub-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-sub-card-emoji { font-size: 1.5rem; flex-shrink: 0; }
.hero-sub-card-name { font-size: 0.8rem; font-weight: 700; }
.hero-sub-card-detail { font-size: 0.7rem; color: var(--color-text-muted); }

/* ── Steps ── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.step-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
  transition: box-shadow var(--transition);
}

.step-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.step-number {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--color-text);
}

.step-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Plant cards ── */
.plants-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2.5rem;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.88rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  transition: border-color var(--transition), background var(--transition);
  display: inline-block;
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.plants-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.plant-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  position: relative;
}

.plant-card:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  transform: translateY(-3px);
}

.plant-img {
  height: 180px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  position: relative;
}

.difficulty-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.difficulty-easy { background: var(--color-primary-light); color: var(--color-primary-dark); }
.difficulty-medium { background: #FEF3C7; color: #92400E; }
.difficulty-hard { background: #FFE4E6; color: #9F1239; }

.plant-body {
  padding: 1.1rem 1.25rem;
}

.plant-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.plant-latin {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: 0.85rem;
}

.plant-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.plant-school {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.plant-adopt {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: color var(--transition);
}

.plant-card:hover .plant-adopt { color: var(--color-primary-dark); }

/* ── Schools ── */
.schools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.school-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: box-shadow var(--transition);
}

.school-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.06);
}

.school-card-top {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.school-avatar {
  width: 2.75rem;
  height: 2.75rem;
  background: var(--color-bg-dark);
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.school-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.school-location {
  font-size: 0.73rem;
  color: var(--color-text-muted);
}

.school-info {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.school-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.school-stat-n {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.school-stat-l {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

/* ── CTA Banner ── */
.cta-banner {
  background: var(--color-bg-dark);
  color: #fff;
  padding: 6rem 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4rem;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(76,175,130,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,201,71,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-text {
  position: relative;
  z-index: 1;
  max-width: 560px;
}

.cta-banner .section-label {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.cta-banner .section-title {
  color: #fff;
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.cta-banner p {
  color: rgba(255,255,255,0.55);
  font-size: 1rem;
}

.cta-action {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-start;
}

.btn-green {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  font-weight: 700;
  font-size: 1rem;
  padding: 1rem 2.25rem;
  border-radius: var(--radius-md);
  display: inline-block;
  transition: background var(--transition), transform var(--transition);
}

.btn-green:hover {
  background: #5BC994;
  transform: translateY(-2px);
}

.cta-note {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}

/* ── Footer ── */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color var(--transition);
}

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

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 99px; }