/* =========================================================
   components.css — Reusable UI pieces.
   ========================================================= */

/* =========================================================
   Buttons
   ========================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-weight: 500;
    font-size: 1rem;
    line-height: 1;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast);
    user-select: none;
    text-decoration: none;
}
.btn:active { transform: translateY(1px); }

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

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background-color: var(--color-primary);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border-color: transparent;
}
.btn-ghost:hover {
    background-color: var(--color-surface-2);
    color: var(--color-text);
}

.btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-lg);
}

.btn:disabled,
.btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =========================================================
   Cards
   ========================================================= */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
    transition:
        background-color var(--theme-transition),
        border-color var(--theme-transition),
        box-shadow var(--transition-base),
        transform var(--transition-base);
}
.card-hover:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.card-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-2);
}
.card-text {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* =========================================================
   Badges
   ========================================================= */
.badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius-pill);
    background-color: var(--color-primary-soft);
    color: var(--color-primary);
}
.badge-accent  { background-color: rgba(67, 160, 71, 0.15); color: var(--color-accent); }
.badge-danger  { background-color: rgba(229, 57, 53, 0.15); color: var(--color-danger); }
.badge-warning { background-color: rgba(251, 140, 0, 0.15); color: var(--color-warning); }

/* =========================================================
   Alerts
   ========================================================= */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border-inline-start: 4px solid;
}
.alert-success {
    background-color: rgba(67, 160, 71, 0.10);
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.alert-danger {
    background-color: rgba(229, 57, 53, 0.10);
    border-color: var(--color-danger);
    color: var(--color-danger);
}
.alert-info {
    background-color: rgba(3, 155, 229, 0.10);
    border-color: var(--color-info);
    color: var(--color-info);
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
    padding: var(--space-8) 0;
    background:
        radial-gradient(1200px 500px at 100% 0%,
            var(--color-primary-soft) 0%,
            transparent 60%),
        var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--theme-transition), border-color var(--theme-transition);
}
.hero-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    align-items: center;
}
.hero-title {
    font-size: clamp(1.75rem, 4vw, 3rem);
    margin-bottom: var(--space-4);
}
.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-5);
    max-width: 60ch;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}
.hero-visual {
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg,
        var(--color-primary) 0%,
        var(--color-accent) 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: grid;
    place-items: center;
    color: #fff;
    font-size: 4rem;
}
@media (min-width: 900px) {
    .hero-inner { grid-template-columns: 1.1fr 0.9fr; }
}

/* =========================================================
   Feature grid
   ========================================================= */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-4);
}
.feature-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    background-color: var(--color-primary-soft);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    margin-bottom: var(--space-3);
    transition: background-color var(--theme-transition), color var(--theme-transition);
}

/* =========================================================
   Section
   ========================================================= */
.section { padding: var(--space-7) 0; }
.section-head { text-align: center; margin-bottom: var(--space-6); }
.section-head h2 { margin-bottom: var(--space-2); }
.section-head p {
    color: var(--color-text-muted);
    max-width: 60ch;
    margin-inline: auto;
}

/* =========================================================
   CTA band
   ========================================================= */
.cta {
    background: linear-gradient(135deg,
        var(--color-primary) 0%,
        var(--color-primary-hover) 100%);
    color: #fff;
    padding: var(--space-7) 0;
    border-radius: var(--radius-lg);
    text-align: center;
}
.cta h2 { color: #fff; }
.cta p  { color: rgba(255, 255, 255, 0.9); margin-bottom: var(--space-5); }
.cta .btn-primary {
    background-color: #fff;
    color: var(--color-primary);
    border-color: #fff;
}
.cta .btn-primary:hover {
    background-color: var(--color-bg);
    color: var(--color-primary-hover);
}

/* =========================================================
   Tables
   ========================================================= */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: background-color var(--theme-transition), border-color var(--theme-transition);
}
.table th,
.table td {
    padding: var(--space-3) var(--space-4);
    text-align: start;
    border-bottom: 1px solid var(--color-border);
}
.table thead th {
    background-color: var(--color-surface-2);
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}
.table tr:last-child td { border-bottom: none; }

/* =========================================================
   Forms
   ========================================================= */
.form-group { margin-bottom: var(--space-4); }
.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-2);
    color: var(--color-text);
    transition: color var(--theme-transition);
}
.form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background-color: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition:
        background-color var(--theme-transition),
        border-color var(--transition-fast),
        color var(--theme-transition),
        box-shadow var(--transition-fast);
}
.form-control::placeholder {
    color: var(--color-text-muted);
    opacity: 0.8;
}
.form-control:hover {
    border-color: var(--color-text-muted);
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.form-control:disabled {
    background-color: var(--color-surface-2);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.form-error {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--space-1);
}

/* =========================================================
   Theme switcher (3-mode)
   ========================================================= */
.theme-switch {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: 3px;
    transition: background-color var(--theme-transition), border-color var(--theme-transition);
}
.theme-switch button {
    background: transparent;
    border: none;
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-pill);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.theme-switch button:hover {
    color: var(--color-text);
}
.theme-switch button.is-active {
    background-color: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}
.theme-switch svg {
    width: 16px;
    height: 16px;
}