/* tg-btn component: accessible, themable light-bulb button */
@layer tg.tokens, tg.component;

/* Tokens: defaults + variants + sizes */
@layer tg.tokens {
  .tg-btn {
    --tg-btn-bg-start: #4b4b4b;
    --tg-btn-bg-end: #2b2b2b;
    --tg-btn-bg-start-hover: #5a5a5a;
    --tg-btn-bg-end-hover: #383838;
    --tg-btn-bg-start-active: #3d3d3d;
    --tg-btn-bg-end-active: #1d1d1d;

    --tg-btn-text: #ffffff;
    --tg-btn-icon-stroke: #ffffff;
    --tg-btn-icon-ring: rgba(255, 255, 255, 0.45);
    --tg-btn-shadow: rgba(0, 0, 0, 0.35);
    --tg-btn-focus-ring: rgba(124, 106, 249, 0.35);

    --tg-btn-glow: rgba(255, 200, 88, 0.0); /* off by default */

    --tg-btn-radius: 999px;
    --tg-btn-padding-inline: 1.25rem;
    --tg-btn-padding-block: 0.75rem;
    --tg-btn-gap: 0.75rem;
    --tg-btn-font-size: 1rem;
    --tg-btn-font-weight: 600;
    --tg-btn-icon-size: 1.75rem;
  }

  /* Orange variant (60% sample, 40% custom) */
  .tg-btn--orange {
    --tg-btn-bg-start: #ff8a00;
    --tg-btn-bg-end: #ff5e00;
    --tg-btn-bg-start-hover: #ff9a26;
    --tg-btn-bg-end-hover: #ff6f2b;
    --tg-btn-bg-start-active: #e67800;
    --tg-btn-bg-end-active: #f04c00;

    --tg-btn-shadow: rgba(255, 118, 0, 0.45);
    --tg-btn-focus-ring: rgba(255, 138, 0, 0.35);
    --tg-btn-glow: rgba(255, 200, 88, 0.75);
  }

  /* Size modifiers */
  .tg-btn--sm {
    --tg-btn-padding-inline: 0.875rem;
    --tg-btn-padding-block: 0.5rem;
    --tg-btn-gap: 0.5rem;
    --tg-btn-font-size: 0.9375rem;
    --tg-btn-icon-size: 1.5rem;
  }

  .tg-btn--lg {
    --tg-btn-padding-inline: 1.5rem;
    --tg-btn-padding-block: 1rem;
    --tg-btn-gap: 1rem;
    --tg-btn-font-size: 1.0625rem;
    --tg-btn-icon-size: 2rem;
  }
}

/* Component styles */
@layer tg.component {
    .tg-btn {
        appearance: none;
        -webkit-text-decoration: inherit;
        text-decoration: none;
        border: none;
        cursor: pointer;
        border-radius: 10px;
        display: inline-flex;
        align-items: center;
        gap: var(--tg-btn-gap);
        padding-inline: var(--tg-btn-padding-inline);
        padding-block: var(--tg-btn-padding-block);
        border-radius: var(--tg-btn-radius);
        background: linear-gradient(90deg, var(--tg-btn-bg-start), var(--tg-btn-bg-end));
        color: var(--tg-btn-text);
        font-size: var(--tg-btn-font-size);
        font-weight: var(--tg-btn-font-weight);
        line-height: 1;
        box-shadow: 0 12px 24px -10px var(--tg-btn-shadow);
        transition: background 160ms ease, transform 120ms ease, box-shadow 160ms ease, filter 120ms ease;
        -webkit-tap-highlight-color: transparent;
    }
        .tg-btn a {
            -webkit-text-decoration: none!important;
            text-decoration: none!important;
        }
        .tg-btn:hover {
            background: linear-gradient(90deg, var(--tg-btn-bg-start-hover), var(--tg-btn-bg-end-hover));
            transform: translateY(-1px);
            box-shadow: 0 18px 28px -12px var(--tg-btn-shadow);
        }

  .tg-btn:active {
    background: linear-gradient(90deg, var(--tg-btn-bg-start-active), var(--tg-btn-bg-end-active));
    transform: translateY(0);
    filter: brightness(0.98);
    box-shadow: 0 10px 20px -12px var(--tg-btn-shadow);
  }

  .tg-btn:focus-visible {
    outline: 3px solid #ffffff;
    outline-offset: 3px;
    box-shadow:
      0 12px 24px -10px var(--tg-btn-shadow),
      0 0 0 6px var(--tg-btn-focus-ring);
  }

  .tg-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(0.2);
  }

  .tg-btn__icon {
    inline-size: var(--tg-btn-icon-size);
    block-size: var(--tg-btn-icon-size);
    border-radius: 50%;
    position: relative;
    flex: 0 0 auto;

    color: var(--tg-btn-icon-stroke); /* drives SVG stroke via currentColor */
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.12));
    border: 1px solid var(--tg-btn-icon-ring);
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
    transition: transform 160ms ease, background 160ms ease, filter 160ms ease;

    display: grid;
    place-items: center;
  }

  .tg-btn__icon svg {
    width: 80%;
    height: 80%;
    display: block;
    filter: drop-shadow(0 0 0 transparent);
  }

  .tg-btn:hover .tg-btn__icon {
    transform: scale(1.05);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.30), rgba(255, 255, 255, 0.18));
  }

  .tg-btn:hover .tg-btn__icon svg {
    filter: drop-shadow(0 0 6px var(--tg-btn-glow));
  }

  .tg-btn:active .tg-btn__icon {
    transform: scale(0.97);
  }

  .tg-btn:active .tg-btn__icon svg {
    filter: drop-shadow(0 0 3px var(--tg-btn-glow));
  }

  @media (prefers-reduced-motion: reduce) {
    .tg-btn,
    .tg-btn__icon,
    .tg-btn__icon svg {
      transition: none;
      filter: none;
    }
  }
}