/* ============================================================
   BUTTON COMPONENTS
   Reusable button styles using CSS custom properties from theme.
   No @apply needed — works standalone in any CSS pipeline.
   ============================================================ */

@layer components {

    /* ── Base ── */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        font-weight: 600;
        font-size: 0.875rem;
        line-height: 1.25rem;
        padding: 0.5rem 1rem;
        border: 1px solid transparent;
        border-radius: 2px;
        transition: background-color 0.2s, color 0.2s, border-color 0.2s, opacity 0.2s;
        outline: none;
        cursor: pointer;
        text-decoration: none;
        white-space: nowrap;
    }
    .btn:disabled,
    .btn[disabled] {
        opacity: 0.5;
        cursor: not-allowed;
        pointer-events: none;
    }
    .btn:focus-visible {
        outline: 2px solid transparent;
        outline-offset: 2px;
        box-shadow: 0 0 0 2px var(--color-brand-500, #3b82f6);
    }

    /* ── Sizes ── */
    .btn-sm {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
        border-radius: 1px;
    }
    .btn-md {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
        border-radius: 2px;
    }
    .btn-lg {
        font-size: 1rem;
        padding: 0.625rem 1.5rem;
        border-radius: 3px;
    }

    /* ── Solid Variants ── */
    .btn-primary {
        background-color: var(--color-brand-500, #3b82f6);
        color: #fff;
    }
    .btn-primary:hover { background-color: var(--color-brand-600, #2563eb); }

    .btn-secondary {
        background-color: #f1f5f9;
        color: #334155;
    }
    .btn-secondary:hover { background-color: #e2e8f0; }

    .btn-danger {
        background-color: #f43f5e;
        color: #fff;
    }
    .btn-danger:hover { background-color: #e11d48; }

    .btn-success {
        background-color: #10b981;
        color: #fff;
    }
    .btn-success:hover { background-color: #059669; }

    .btn-warning {
        background-color: #f59e0b;
        color: #fff;
    }
    .btn-warning:hover { background-color: #d97706; }

    .btn-info {
        background-color: #0ea5e9;
        color: #fff;
    }
    .btn-info:hover { background-color: #0284c7; }

    /* Dark mode — solid secondary */
    @media (prefers-color-scheme: dark) {
        .btn-secondary {
            background-color: #2a2a2a;
            color: #cbd5e1;
        }
        .btn-secondary:hover { background-color: #333333; }
    }
    .dark .btn-secondary {
        background-color: #2a2a2a;
        color: #cbd5e1;
    }
    .dark .btn-secondary:hover { background-color: #333333; }

    /* ── Soft Variants ── */
    .btn-soft-primary {
        background-color: #eff6ff;
        color: #2563eb;
    }
    .btn-soft-primary:hover { background-color: #dbeafe; }
    .dark .btn-soft-primary {
        background-color: rgba(59, 130, 246, 0.12);
        color: #93c5fd;
    }
    .dark .btn-soft-primary:hover { background-color: rgba(59, 130, 246, 0.2); }

    .btn-soft-secondary {
        background-color: #f8fafc;
        color: #475569;
    }
    .btn-soft-secondary:hover { background-color: #f1f5f9; }
    .dark .btn-soft-secondary {
        background-color: rgba(100, 116, 139, 0.15);
        color: #94a3b8;
    }
    .dark .btn-soft-secondary:hover { background-color: rgba(100, 116, 139, 0.25); }

    .btn-soft-danger {
        background-color: #fff1f2;
        color: #e11d48;
    }
    .btn-soft-danger:hover { background-color: #ffe4e6; }
    .dark .btn-soft-danger {
        background-color: rgba(244, 63, 94, 0.12);
        color: #fb7185;
    }
    .dark .btn-soft-danger:hover { background-color: rgba(244, 63, 94, 0.2); }

    .btn-soft-success {
        background-color: #ecfdf5;
        color: #059669;
    }
    .btn-soft-success:hover { background-color: #d1fae5; }
    .dark .btn-soft-success {
        background-color: rgba(16, 185, 129, 0.12);
        color: #6ee7b7;
    }
    .dark .btn-soft-success:hover { background-color: rgba(16, 185, 129, 0.2); }

    .btn-soft-warning {
        background-color: #fefce8;
        color: #d97706;
    }
    .btn-soft-warning:hover { background-color: #fef9c3; }
    .dark .btn-soft-warning {
        background-color: rgba(245, 158, 11, 0.12);
        color: #fcd34d;
    }
    .dark .btn-soft-warning:hover { background-color: rgba(245, 158, 11, 0.2); }

    .btn-soft-info {
        background-color: #f0f9ff;
        color: #0284c7;
    }
    .btn-soft-info:hover { background-color: #e0f2fe; }
    .dark .btn-soft-info {
        background-color: rgba(14, 165, 233, 0.12);
        color: #7dd3fc;
    }
    .dark .btn-soft-info:hover { background-color: rgba(14, 165, 233, 0.2); }

    /* ── Outline Variants ── */
    .btn-outline-primary {
        background-color: transparent;
        border-color: #3b82f6;
        color: #2563eb;
    }
    .btn-outline-primary:hover { background-color: #eff6ff; }
    .dark .btn-outline-primary { color: #93c5fd; }
    .dark .btn-outline-primary:hover { background-color: rgba(59, 130, 246, 0.1); }

    .btn-outline-secondary {
        background-color: transparent;
        border-color: #e2e8f0;
        color: #475569;
    }
    .btn-outline-secondary:hover { background-color: #f8fafc; }
    .dark .btn-outline-secondary { border-color: #2e2e2e; color: #94a3b8; }
    .dark .btn-outline-secondary:hover { background-color: #1a1a1a; }

    .btn-outline-danger {
        background-color: transparent;
        border-color: #f43f5e;
        color: #e11d48;
    }
    .btn-outline-danger:hover { background-color: #fff1f2; }
    .dark .btn-outline-danger { color: #fb7185; }
    .dark .btn-outline-danger:hover { background-color: rgba(244, 63, 94, 0.1); }

    .btn-outline-success {
        background-color: transparent;
        border-color: #10b981;
        color: #059669;
    }
    .btn-outline-success:hover { background-color: #ecfdf5; }
    .dark .btn-outline-success { color: #6ee7b7; }
    .dark .btn-outline-success:hover { background-color: rgba(16, 185, 129, 0.1); }

    .btn-outline-warning {
        background-color: transparent;
        border-color: #f59e0b;
        color: #d97706;
    }
    .btn-outline-warning:hover { background-color: #fefce8; }
    .dark .btn-outline-warning { color: #fcd34d; }
    .dark .btn-outline-warning:hover { background-color: rgba(245, 158, 11, 0.1); }

    .btn-outline-info {
        background-color: transparent;
        border-color: #0ea5e9;
        color: #0284c7;
    }
    .btn-outline-info:hover { background-color: #f0f9ff; }
    .dark .btn-outline-info { color: #7dd3fc; }
    .dark .btn-outline-info:hover { background-color: rgba(14, 165, 233, 0.1); }

    /* ── Icon Buttons ── */
    .btn-icon {
        padding: 0;
        width: 2.25rem;   /* 36px */
        height: 2.25rem;
        border-radius: 2px;
    }
    .btn-icon.btn-sm {
        width: 1.75rem;   /* 28px */
        height: 1.75rem;
        border-radius: 1px;
    }
    .btn-icon.btn-lg {
        width: 2.75rem;   /* 44px */
        height: 2.75rem;
        border-radius: 3px;
    }

    /* ── Shape Modifiers ── */
    .btn-rounded {
        border-radius: 9999px !important;
    }
    .btn-square {
        border-radius: 6px !important;
    }
}