/* === RESET & ZÁKLAD === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --zelena:       #4A7C59;
  --zelena-tmava: #2E5E3A;
  --akcent:       #C8600A;
  --bg:           #F5F1EB;
  --bg2:          #FFFFFF;
  --text:         #2A2A2A;
  --text-tlumeny: #666;
  --okraj:        #DDD5C8;
  --radius:       10px;
  --stin:         0 2px 12px rgba(0,0,0,0.10);
  --font:         'Nunito', system-ui, sans-serif;
}

html, body {
  height: 100%;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.5;
}

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

/* === HLAVIČKA === */
.site-header {
  background: var(--zelena-tmava);
  color: #fff;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.site-logo span { color: #A8D8A8; }

.site-nav a {
  color: rgba(255,255,255,0.85);
  margin-left: 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.site-nav a:hover { color: #fff; text-decoration: none; }

/* === TLAČÍTKA === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 700;
  transition: filter 0.15s, transform 0.1s;
}

.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--zelena);
  color: #fff;
}

.btn-akcent {
  background: var(--akcent);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--zelena);
  border: 2px solid var(--zelena);
}

/* === INDEX — HERO === */
.hero {
  background: linear-gradient(135deg, var(--zelena-tmava) 0%, #5A9C6A 100%);
  color: #fff;
  padding: 5rem 2rem 4rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.88;
  max-width: 540px;
  margin: 0 auto 2rem;
}

/* === INDEX — MODELY === */
.sekce {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.sekce h2 {
  font-size: 1.6rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--zelena-tmava);
}

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

.model-karta {
  background: var(--bg2);
  border-radius: var(--radius);
  box-shadow: var(--stin);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}

.model-karta:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.13);
}

.model-karta-img {
  background: #E8F4EA;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.model-karta-body {
  padding: 1.2rem 1.4rem 1.4rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.model-karta h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.model-karta p {
  color: var(--text-tlumeny);
  font-size: 0.9rem;
  flex: 1;
  margin-bottom: 0.8rem;
}

.model-karta .badge {
  font-size: 0.78rem;
  color: var(--zelena-tmava);
  font-weight: 700;
  background: #E0F0E4;
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 20px;
  margin-bottom: 1rem;
}

/* === KONFIGURÁTOR — LAYOUT === */
.konfig-layout {
  display: grid;
  grid-template-columns: 300px 1fr 310px;
  height: calc(100vh - 58px);
}

/* Levý panel */
.panel-levy {
  background: var(--bg2);
  border-right: 1px solid var(--okraj);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

/* Střed — canvas */
.panel-canvas {
  position: relative;
  background: #E8F4EA;
}

#canvas3d {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#canvas3d:active { cursor: grabbing; }

.canvas-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.45);
  color: #fff;
  font-size: 0.78rem;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  pointer-events: none;
  white-space: nowrap;
}

/* Pravý panel */
.panel-pravy {
  background: var(--bg2);
  border-left: 1px solid var(--okraj);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

/* Panel sekce */
.panel-sekce {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--okraj);
}

.panel-sekce h3 {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tlumeny);
  margin-bottom: 0.75rem;
}

/* Tlačítka modelů */
#model-btns {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.btn-model {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0.65rem 0.9rem;
  border: 2px solid var(--okraj);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  font-family: var(--font);
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}

.btn-model strong { font-size: 0.95rem; color: var(--text); }
.btn-model small  { font-size: 0.78rem; color: var(--text-tlumeny); margin-top: 0.1rem; }

.btn-model:hover { border-color: var(--zelena); }

.btn-model.active {
  border-color: var(--zelena);
  background: #EBF5ED;
}

/* Tlačítka komponent */
#komponenta-btns {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.btn-komponenta {
  padding: 0.55rem 0.85rem;
  border: 2px solid var(--okraj);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: left;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}

.btn-komponenta:hover { border-color: var(--zelena); }

.btn-komponenta.active {
  border-color: var(--zelena);
  background: #EBF5ED;
  color: var(--zelena-tmava);
}

/* Barevná paleta */
#paleta {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
}

.swatch {
  aspect-ratio: 1;
  border-radius: 6px;
  border: 3px solid transparent;
  cursor: pointer;
  transition: transform 0.12s, border-color 0.12s;
  position: relative;
}

.swatch:hover { transform: scale(1.12); }

.swatch.active {
  border-color: var(--zelena-tmava);
  transform: scale(1.12);
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--zelena-tmava);
}

/* Tooltip na barvu */
.swatch::after {
  content: attr(title);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #222;
  color: #fff;
  font-size: 0.72rem;
  white-space: nowrap;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  z-index: 10;
}

.swatch:hover::after { opacity: 1; }

/* === REKAPITULACE === */
.summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.summary-table td { padding: 0.3rem 0; vertical-align: middle; }
.summary-table td:first-child { color: var(--text-tlumeny); width: 45%; }
.summary-table td:last-child { font-weight: 600; display: flex; align-items: center; gap: 0.4rem; }

.summary-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.15);
  flex-shrink: 0;
}

#summary-cena {
  font-size: 1rem;
  color: var(--zelena-tmava);
}

/* === FORMULÁŘ === */
.form-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-field label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-tlumeny);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1.5px solid var(--okraj);
  border-radius: 7px;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color 0.15s;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--zelena);
  background: #fff;
}

.form-field textarea {
  resize: vertical;
  min-height: 70px;
}

.gdpr-check {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-tlumeny);
}

.gdpr-check input { margin-top: 3px; flex-shrink: 0; }

#btn-odeslat {
  width: 100%;
  padding: 0.75rem;
  margin-top: 0.4rem;
  font-size: 1rem;
}

.form-zprava {
  padding: 0.6rem 0.8rem;
  border-radius: 7px;
  font-size: 0.88rem;
  font-weight: 600;
  display: none;
}

.form-zprava.ok {
  background: #E4F5E4;
  color: #2E7D32;
  display: block;
}

.form-zprava.chyba {
  background: #FCE8E8;
  color: #C62828;
  display: block;
}

/* === INDEX — JAK TO FUNGUJE === */
.kroky {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.krok {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--bg2);
  border-radius: var(--radius);
  box-shadow: var(--stin);
}

.krok-cislo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--zelena);
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
}

.krok h4 { font-size: 1rem; font-weight: 800; margin-bottom: 0.3rem; }
.krok p  { font-size: 0.85rem; color: var(--text-tlumeny); }

/* === PATIČKA === */
.site-footer {
  background: var(--zelena-tmava);
  color: rgba(255,255,255,0.75);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.85rem;
}

/* === RESPONZIVITA === */
@media (max-width: 900px) {
  .konfig-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 50vh auto;
    height: auto;
  }

  .panel-levy  { border-right: none; border-bottom: 1px solid var(--okraj); }
  .panel-pravy { border-left: none; border-top: 1px solid var(--okraj); }

  #paleta { grid-template-columns: repeat(5, 1fr); }
}