@layer base, layout, components, utilities;
:root {
  --altcha-border-width: 1px;
  --altcha-border-radius: var(--radius-s);
  --altcha-color-base: var(--color-surface);
  --altcha-color-bg: var(--color-surface);
  --altcha-color-border: color-mix(in oklab, var(--color-text) 20%, transparent);
  --altcha-color-text: var(--color-text);
  --altcha-color-border-focus: var(--color-primary);
  --altcha-color-error-text: var(--color-error);
  --altcha-color-footer-bg: var(--color-surface-variant);
  --altcha-max-width: 100%;

  --swiper-navigation-color: var(--color-contrast);
  --swiper-theme-color: var(--color-primary);
}
:root {
  /* Tokeny (Primitíva) */
  --clr-alabaster: #F7F4EF;
  --clr-slate: #424A57;
  --clr-gold: #C2A66B;
  --clr-powder: #E7C4C4;

  /* Sémantika (Systém) - Light theme */
  --color-surface: var(--clr-alabaster);
  --color-text: var(--clr-slate);
  --color-primary: var(--clr-gold);
  --color-accent: var(--clr-powder);
  --color-surface-variant: color-mix(in oklab, var(--color-surface) 95%, var(--color-text));
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-contrast: #ffffff; /* Contrast background for transparent images */

  /* Fonts */
  --font-serif: 'Playfair Display', ui-serif, Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  /* Spacing */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-s: 0.75rem;
  --space-m: 1rem;
  --space-l: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Typography scale */
  --size-step-0: clamp(0.95rem, 0.2vw + 0.9rem, 1.05rem);
  --size-step-1: clamp(1.25rem, 0.6vw + 1.1rem, 1.5rem);
  --size-step-2: clamp(1.6rem, 1.2vw + 1.2rem, 2rem);
  --size-step-3: clamp(2.25rem, 2vw + 1.6rem, 2.8rem);
  --size-step-4: clamp(3rem, 3.5vw + 2rem, 4rem);

  --max-content: 1200px;
  --radius-s: 0.375rem;
  --radius-m: 0.75rem;
  --radius-pill: 9999px;
  --shadow-m: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Sémantika (Systém) - Dark theme */
    --color-surface: #171717; /* near-black for dark background */
    --color-text: #E6E6E6;     /* light text */
    --color-primary: #D4B880;  /* slightly brighter gold */
    --color-accent: #E4AEB7;   /* deeper pink */
    --color-surface-variant: #262626;
    --color-success: #4ade80;
    --color-warning: #fbbf24;
    --color-error: #f87171;
    --color-contrast: #f0f0f0; /* Light gray for contrast in dark mode */
  }
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--size-step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@layer layout {
  .l-container {
    max-width: var(--max-content);
    margin-inline: auto;
    padding-inline: var(--space-m);
  }

  .l-stack {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

  .l-stack > * + * {
    margin-block-start: var(--space-m);
  }

  .l-grid {
    display: grid;
    gap: var(--space-m);
  }

  .l-main-container {
    min-height: 80vh;
  }
}

[hidden] {
  display: none !important;
}

@layer components {
  /* Globálny komponent: Button */
  .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.75rem;
    font-family: var(--font-sans);
    font-size: var(--size-step-0);
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: 999px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    line-height: 1.2;
    background: transparent;
    color: var(--color-text);

    &:hover {
      transform: translateY(-2px);
    }

    &:active {
      transform: translateY(0);
      opacity: 0.9;
    }

    &:focus-visible {
      outline: 2px solid var(--color-primary);
      outline-offset: 3px;
    }

    /* Variant: Primary (Plný zlatý) */
    &[data-variant="primary"] {
      background: var(--color-primary);
      color: #1d1a14;
      box-shadow: 0 6px 14px color-mix(in oklab, var(--color-primary) 35%, transparent);

      &:hover {
        box-shadow: 0 8px 18px color-mix(in oklab, var(--color-primary) 45%, transparent);
        background: color-mix(in oklab, var(--color-primary) 90%, white);
      }
    }

    /* Variant: Secondary (Obrysový) */
    &[data-variant="secondary"] {
      background: transparent;
      color: var(--color-primary);
      border-color: color-mix(in oklab, var(--color-primary) 40%, transparent);

      &:hover {
        background: color-mix(in oklab, var(--color-primary) 10%, transparent);
        border-color: var(--color-primary);
      }
    }

    /* Variant: Outline Gold */
    &[data-variant="outline-gold"] {
      background: transparent;
      color: var(--color-primary);
      border-color: var(--color-primary);

      &:hover {
        background: color-mix(in oklab, var(--color-primary) 10%, transparent);
        box-shadow: 0 0 15px color-mix(in oklab, var(--color-primary) 30%, transparent);
      }
    }

    &:disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none !important;
      box-shadow: none !important;
    }
  }

  /* Globálny komponent: Select */
  .select {
    display: block;
    width: 100%;
    max-width: 100%;
    appearance: none;
    background: var(--color-surface);
    border: 2px solid color-mix(in oklab, var(--color-text) 15%, transparent);
    border-radius: 8px;
    padding: 0.6rem 2.75rem 0.6rem 1rem;
    font-family: var(--font-sans);
    font-size: var(--size-step-0);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s ease;

    /* Vlastná šípka - zlatá */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23C2A66B' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25rem;

    &:hover {
      border-color: color-mix(in oklab, var(--color-primary) 50%, transparent);
    }

    &:focus {
      outline: none;
      border-color: var(--color-primary);
      box-shadow: 0 0 0 4px color-mix(in oklab, var(--color-primary) 15%, transparent);
    }

    & option {
      background: var(--color-surface);
      color: var(--color-text);
    }
  }

  /* Globálny komponent: Checkbox (Toggle switch štýl) */
  .checkbox {
    appearance: none;
    width: 3rem;
    height: 1.6rem;
    background: color-mix(in oklab, var(--color-text) 15%, transparent);
    border-radius: 999px;
    position: relative;
    cursor: pointer;
    transition: background 0.3s;
    flex-shrink: 0;

    &::after {
      content: "";
      position: absolute;
      top: 0.2rem;
      left: 0.2rem;
      width: 1.2rem;
      height: 1.2rem;
      background: white;
      border-radius: 50%;
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }

    &:checked {
      background: var(--color-primary);
    }

    &:checked::after {
      transform: translateX(1.4rem);
    }

    &:focus-visible {
      outline: 2px solid var(--color-primary);
      outline-offset: 2px;
    }
  }
}