/* =============================================================
   Spotrebovač — Hlavný štýlový súbor
   Mobile-first, CSS custom properties, bez frameworku
   ============================================================= */

/* -------------------------------------------------------------
   1. CSS Custom Properties (Premenné)
   ------------------------------------------------------------- */
:root {
  /* Farby — primárna modrá a funkčné farby */
  --color-primary:       #2196F3;
  --color-primary-dark:  #1976D2;
  --color-primary-light: #BBDEFB;

  --color-success:       #4CAF50;
  --color-success-bg:    #E8F5E9;
  --color-success-dark:  #388E3C;

  --color-error:         #F44336;
  --color-error-bg:      #FFEBEE;
  --color-error-dark:    #C62828;

  --color-warning:       #FF9800;
  --color-warning-bg:    #FFF3E0;
  --color-warning-dark:  #E65100;

  /* Šedé odtiene */
  --color-gray-50:  #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BDBDBD;
  --color-gray-500: #9E9E9E;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;

  /* Text */
  --color-text:         #212121;
  --color-text-muted:   #757575;
  --color-text-inverse: #FFFFFF;

  /* Pozadia */
  --color-bg:         #F5F7FA;
  --color-bg-card:    #FFFFFF;
  --color-border:     #E0E0E0;

  /* Medzery */
  --spacing-xs:   0.25rem;   /* 4px */
  --spacing-sm:   0.5rem;    /* 8px */
  --spacing-md:   1rem;      /* 16px */
  --spacing-lg:   1.5rem;    /* 24px */
  --spacing-xl:   2rem;      /* 32px */
  --spacing-2xl:  3rem;      /* 48px */

  /* Typografia */
  --font-family:  -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */

  /* Okraje a tiene */
  --border-radius:    6px;
  --border-radius-lg: 12px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:    0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);
  --shadow-lg:    0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);

  /* Navigácia */
  --nav-height: 56px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* -------------------------------------------------------------
   3. Typografia
   ------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-2xl); margin-bottom: var(--spacing-md); }
h2 { font-size: var(--font-size-xl);  margin-bottom: var(--spacing-sm); }
h3 { font-size: var(--font-size-lg);  margin-bottom: var(--spacing-sm); }

p { margin-bottom: var(--spacing-md); }

/* -------------------------------------------------------------
   4. Layout — Header a Navigácia
   ------------------------------------------------------------- */
.site-header {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
  height: var(--nav-height);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.site-logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-inverse);
  text-decoration: none;
  letter-spacing: -0.02em;
}

/* Hamburger tlačidlo — viditeľné len na mobile */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  /* Min 44px touch target */
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-inverse);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobilná navigácia — skrytá predvolene */
.main-nav {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  z-index: 99;
}

.main-nav.is-open {
  display: block;
}

.main-nav__list {
  padding: var(--spacing-sm) 0;
}

.main-nav__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: rgba(255,255,255,0.9);
  font-size: var(--font-size-md);
  min-height: 44px;
  line-height: 28px;
}

.main-nav__link:hover,
.main-nav__link--active {
  background-color: rgba(0,0,0,0.15);
  color: var(--color-text-inverse);
  text-decoration: none;
}

.main-nav__link--active {
  font-weight: 600;
}

/* -------------------------------------------------------------
   5. Layout — Hlavný obsah
   ------------------------------------------------------------- */
.site-main {
  padding: var(--spacing-md);
  padding-bottom: var(--spacing-2xl);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* -------------------------------------------------------------
   6. Card komponent (pre pobyty)
   ------------------------------------------------------------- */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.card__header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

.card__body {
  padding: var(--spacing-md);
}

.card__footer {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-gray-50);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* Grid kariet */
.cards-grid {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

/* -------------------------------------------------------------
   7. Tabuľky (pre dashboard, porovnanie)
   ------------------------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

thead {
  background-color: var(--color-gray-100);
}

th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-gray-700);
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: var(--color-gray-50);
}

/* Čísla zarovnané doprava */
td.num, th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* -------------------------------------------------------------
   8. Formulárové prvky
   ------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gray-700);
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="email"],
input[type="password"],
select,
textarea {
  display: block;
  width: 100%;
  padding: 0.625rem var(--spacing-sm);
  font-size: var(--font-size-md); /* min 16px — zabraňuje zoom na iOS */
  line-height: 1.5;
  color: var(--color-text);
  background-color: #fff;
  border: 1px solid var(--color-gray-400);
  border-radius: var(--border-radius);
  transition: border-color 0.15s, box-shadow 0.15s;
  min-height: 44px; /* min touch target */
  appearance: none;
  -webkit-appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23757575' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px 12px;
  padding-right: 2.5rem;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

textarea {
  min-height: 100px;
  resize: vertical;
}

.form-help {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--spacing-xs);
}

.form-row {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

.form-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

/* -------------------------------------------------------------
   9. Tlačidlá
   ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.625rem var(--spacing-md);
  font-size: var(--font-size-md);
  font-weight: 500;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, box-shadow 0.15s;
  min-height: 44px; /* min touch target */
  white-space: nowrap;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  text-decoration: none;
  color: var(--color-text-inverse);
}

.btn--secondary {
  background-color: transparent;
  border-color: var(--color-gray-400);
  color: var(--color-gray-700);
}

.btn--secondary:hover {
  background-color: var(--color-gray-100);
  text-decoration: none;
}

.btn--danger {
  background-color: var(--color-error);
  border-color: var(--color-error);
  color: var(--color-text-inverse);
}

.btn--danger:hover {
  background-color: var(--color-error-dark);
  border-color: var(--color-error-dark);
  text-decoration: none;
  color: var(--color-text-inverse);
}

.btn--sm {
  padding: 0.375rem var(--spacing-sm);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* -------------------------------------------------------------
   10. Flash správy
   ------------------------------------------------------------- */
.flash {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-radius: var(--border-radius);
  border: 1px solid transparent;
  font-size: var(--font-size-md);
}

.flash--success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success-dark);
}

.flash--error {
  background-color: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error-dark);
}

.flash--warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning-dark);
}

.flash__message {
  flex: 1;
}

.flash__close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  color: inherit;
  opacity: 0.7;
  padding: 0;
  min-width: 24px;
  min-height: 24px;
}

.flash__close:hover {
  opacity: 1;
}

/* -------------------------------------------------------------
   11. Odznak / Badge (vyúčtované / priebežné)
   ------------------------------------------------------------- */
.badge {
  display: inline-block;
  padding: 0.2em 0.6em;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  white-space: nowrap;
  vertical-align: middle;
}

.badge--success {
  background-color: var(--color-success-bg);
  color: var(--color-success-dark);
}

.badge--warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-dark);
}

.badge--error {
  background-color: var(--color-error-bg);
  color: var(--color-error-dark);
}

.badge--info {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* -------------------------------------------------------------
   12. Spinner (loading indikátor)
   ------------------------------------------------------------- */
.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 3px solid var(--color-gray-300);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
}

.spinner--lg {
  width: 3rem;
  height: 3rem;
  border-width: 4px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-muted);
  padding: var(--spacing-md) 0;
}

/* -------------------------------------------------------------
   13. Lightbox (fullsize fotky)
   ------------------------------------------------------------- */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0,0,0,0.85);
  z-index: 200;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox-overlay.is-open {
  display: flex;
}

.lightbox-img {
  max-width: 95vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--border-radius);
  cursor: default;
  box-shadow: var(--shadow-lg);
}

.lightbox-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: rgba(255,255,255,0.15);
  border: none;
  color: #fff;
  font-size: 1.75rem;
  line-height: 1;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.25);
}

/* -------------------------------------------------------------
   14. Chybová stránka
   ------------------------------------------------------------- */
.error-page {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.error-page__code {
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-gray-300);
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.error-page__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
}

.error-page__message {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

/* -------------------------------------------------------------
   15. Page header (nadpis stránky + akcie)
   ------------------------------------------------------------- */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.page-header__title {
  margin: 0;
}

/* -------------------------------------------------------------
   16. Utility triedy
   ------------------------------------------------------------- */
.text-muted   { color: var(--color-text-muted); }
.text-success { color: var(--color-success-dark); }
.text-error   { color: var(--color-error-dark); }
.text-warning { color: var(--color-warning-dark); }
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.font-bold    { font-weight: 600; }

.mt-sm  { margin-top: var(--spacing-sm); }
.mt-md  { margin-top: var(--spacing-md); }
.mt-lg  { margin-top: var(--spacing-lg); }
.mb-sm  { margin-bottom: var(--spacing-sm); }
.mb-md  { margin-bottom: var(--spacing-md); }
.mb-lg  { margin-bottom: var(--spacing-lg); }

.d-flex       { display: flex; }
.align-center { align-items: center; }
.gap-sm       { gap: var(--spacing-sm); }
.gap-md       { gap: var(--spacing-md); }
.flex-wrap    { flex-wrap: wrap; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* Foto thumbnail */
.foto-thumb {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--border-radius);
  cursor: pointer;
  border: 2px solid var(--color-border);
  transition: border-color 0.15s;
}

.foto-thumb:hover {
  border-color: var(--color-primary);
}

/* IMS stav */
.ims-stav { font-size: var(--font-size-sm); }
.ims-stav--prebieha { color: var(--color-warning-dark); }
.ims-stav--hotovo   { color: var(--color-success-dark); }
.ims-stav--chyba    { color: var(--color-error-dark); }
.ims-stav--ziadny   { color: var(--color-text-muted); }

/* -------------------------------------------------------------
   17. Responsive — tablet (≥ 768px)
   ------------------------------------------------------------- */
@media (min-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .site-main {
    padding: var(--spacing-lg);
  }

  /* Navigácia — horizontálna na tablete */
  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: block !important;
    position: static;
    background-color: transparent;
    box-shadow: none;
  }

  .main-nav__list {
    display: flex;
    gap: 0;
    padding: 0;
  }

  .main-nav__link {
    padding: 0 var(--spacing-md);
    line-height: var(--nav-height);
    display: inline-block;
    min-height: unset;
    border-radius: 0;
  }

  .main-nav__link:hover {
    background-color: rgba(0,0,0,0.12);
  }

  .main-nav__link--active {
    background-color: rgba(0,0,0,0.18);
    border-bottom: 3px solid rgba(255,255,255,0.8);
  }

  .form-row {
    grid-template-columns: 1fr 1fr;
  }

  .cards-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* -------------------------------------------------------------
   18. Responsive — desktop (≥ 1024px)
   ------------------------------------------------------------- */
@media (min-width: 1024px) {
  .site-main {
    padding: var(--spacing-xl);
  }

  .form-row.form-row--3 {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .cards-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  table {
    font-size: var(--font-size-md);
  }
}