/* ==========================================================================
   COMPONENTS CSS - Reusable UI components
   Includes: buttons, forms, cards, dropdowns, alerts, badges, and navigation
   ========================================================================== */

/* ==========================================================================
   Buttons
   ========================================================================== */

button,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px; /* Touch-friendly */
    padding: var(--spacing-base) var(--spacing-lg);
    font-family: inherit;
    font-size: inherit;
    font-weight: 500;
    line-height: 1;
    color: white;
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--border-radius-base);
    cursor: pointer;
    text-decoration: none;
    transition: background-color var(--transition-base),
                transform var(--transition-fast);
}

button:hover,
.button:hover {
    background-color: var(--color-primary-hover);
}

button:active,
.button:active {
    transform: translateY(1px);
}

button:focus-visible,
.button:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

button:disabled,
.button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Button Variants */
.button--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.button--secondary:hover {
    background-color: rgba(var(--color-primary-rgb), 0.1);
}

.button--ghost {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.button--ghost:hover {
    background-color: var(--color-annotation-bg);
    border-color: var(--color-primary);
}

.button--danger {
    background-color: var(--color-error);
}

.button--danger:hover {
    background-color: #cc0000;
}

.button--small {
    min-height: 32px;
    padding: var(--spacing-sm) var(--spacing-base);
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
input[type="number"],
textarea,
select {
    width: 100%;
    min-height: 44px;
    padding: var(--spacing-base);
    font-family: inherit;
    font-size: inherit;
    color: var(--color-text);
    background-color: var(--color-input-bg);
    border: 1px solid var(--color-input-border);
    border-radius: var(--border-radius-base);
    transition: border-color var(--transition-base),
                box-shadow var(--transition-base);
}

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

textarea {
    min-height: 120px;
    resize: vertical;
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-base) center;
    padding-right: calc(var(--spacing-base) * 2 + 12px);
}

/* Checkbox and Radio */
input[type="checkbox"],
input[type="radio"] {
    width: 18px;
    height: 18px;
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--spacing-base);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    overflow: hidden;
    transition: transform var(--transition-base),
                box-shadow var(--transition-base);
}

.card--interactive:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card__header {
    padding: var(--spacing-base) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

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

.card__footer {
    padding: var(--spacing-base) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-annotation-bg);
}

/* ==========================================================================
   Dropdown Navigation
   ========================================================================== */

.dropdown {
    position: relative;
}

.dropdown__toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3em;
    padding: var(--spacing-sm) var(--spacing-base);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    cursor: pointer;
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast);
}

.dropdown__toggle:hover,
.dropdown__toggle:focus {
    background-color: var(--color-annotation-bg);
    border-color: var(--color-primary);
    outline: none;
}

.dropdown__arrow {
    font-size: 0.7em;
    transition: transform var(--transition-base);
}

.dropdown:hover .dropdown__arrow,
.dropdown:focus-within .dropdown__arrow {
    transform: rotate(180deg);
}

.dropdown__menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-dropdown);
    display: none;
    min-width: 160px;
    margin-top: var(--spacing-xs);
    padding: var(--spacing-sm) 0;
    list-style: none;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    box-shadow: var(--shadow-lg);
}

.dropdown:hover .dropdown__menu,
.dropdown:focus-within .dropdown__menu {
    display: block;
}

.dropdown__item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-base);
    color: var(--color-text);
    text-decoration: none;
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}

.dropdown__item:hover,
.dropdown__item:focus {
    background-color: var(--color-annotation-bg);
    color: var(--color-primary);
    outline: none;
}

.dropdown__item--active {
    background-color: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
}

/* Theme adjustments */
[data-theme="dark"] .dropdown__menu {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="grayscale"] .dropdown__toggle,
[data-theme="grayscale"] .dropdown__menu {
    border-width: 2px;
    border-color: var(--color-text);
}

/* ==========================================================================
   Channel Dropdown (Site Navigation)
   ========================================================================== */

.channel-dropdown {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.dropdown-group {
    position: relative;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3em;
    padding: 0.4rem 0.8rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    cursor: pointer;
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast);
}

.dropdown-toggle:hover,
.dropdown-toggle:focus {
    background-color: var(--color-annotation-bg);
    border-color: var(--color-primary);
    outline: none;
}

/* Navigation link styled like a button (for "All Messages" link) */
.nav-link-button {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.8rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast);
}

.nav-link-button:hover,
.nav-link-button:focus {
    background-color: var(--color-annotation-bg);
    border-color: var(--color-primary);
    color: var(--color-primary);
    outline: none;
}

.dropdown-arrow {
    font-size: 0.7em;
    transition: transform var(--transition-base);
}

.dropdown-group:hover .dropdown-arrow,
.dropdown-group:focus-within .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-fixed);
    display: none;
    min-width: 160px;
    margin: var(--spacing-xs) 0 0 0;
    padding: var(--spacing-sm) 0;
    list-style: none;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    box-shadow: var(--shadow-lg);
}

.dropdown-group:hover .dropdown-menu,
.dropdown-group:focus-within .dropdown-menu {
    display: block;
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-base);
    color: var(--color-text);
    text-decoration: none;
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--color-annotation-bg);
    color: var(--color-primary);
    outline: none;
}

/* Theme adjustments for channel dropdown */
[data-theme="dark"] .dropdown-menu {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="grayscale"] .dropdown-toggle,
[data-theme="grayscale"] .nav-link-button {
    border: 1px solid var(--color-text);
    background: var(--color-background);
}

[data-theme="grayscale"] .dropdown-menu {
    border: 1px solid var(--color-text);
}

/* ==========================================================================
   Alerts / Status Messages
   ========================================================================== */

.alert {
    padding: var(--spacing-base);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius-base);
    border: 1px solid transparent;
}

.alert--success,
.success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border-color: var(--color-success);
}

.alert--error,
.error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border-color: var(--color-error);
}

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

.alert--info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border-color: var(--color-info);
}

/* ==========================================================================
   Badges / Tags
   ========================================================================== */

.badge {
    display: inline-block;
    padding: 0.2em 0.6em;
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-annotation-bg);
    color: var(--color-text-secondary);
}

.badge--public,
.tag-public {
    background-color: #e7f5e7;
    color: #2c662d;
}

.badge--private,
.tag-private {
    background-color: #fff3cd;
    color: #856404;
}

.badge--restricted,
.tag-restricted {
    background-color: #f8d7da;
    color: #721c24;
}

/* Dark theme badge adjustments */
[data-theme="dark"] .badge--public,
[data-theme="dark"] .tag-public {
    background-color: #1e3a1e;
    color: #7cc47d;
}

[data-theme="dark"] .badge--private,
[data-theme="dark"] .tag-private {
    background-color: #3d3524;
    color: #ffd866;
}

[data-theme="dark"] .badge--restricted,
[data-theme="dark"] .tag-restricted {
    background-color: #3d2427;
    color: #ea868f;
}

/* ==========================================================================
   Site Banner / Header
   ========================================================================== */

.site-banner {
    background-color: var(--color-header-bg);
    padding: var(--spacing-base) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.banner-content {
    width: 100%;
    max-width: var(--max-width-content);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.site-banner .site-title {
    margin: 0;
    padding: 0;
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.site-banner .site-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* Dark mode banner */
[data-theme="dark"] .site-banner {
    background-color: var(--color-header-bg);
    border-color: var(--color-border);
}

/* Grayscale mode banner */
[data-theme="grayscale"] .site-banner {
    background-color: #000000;
    border-color: #ffffff;
    border-width: 2px;
}

[data-theme="grayscale"] .site-banner .site-title,
[data-theme="grayscale"] .site-banner .site-description {
    color: #ffffff;
}

/* ==========================================================================
   Theme Switcher
   ========================================================================== */

.theme-switcher {
    position: fixed;
    top: var(--spacing-base);
    right: var(--spacing-base);
    z-index: var(--z-fixed);
}

.theme-button {
    padding: var(--spacing-sm);
    min-height: auto;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-background);
    color: var(--color-text);
}

.theme-menu {
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    padding: var(--spacing-sm);
    display: none;
    min-width: 150px;
    box-shadow: var(--shadow-base);
}

.theme-switcher:hover .theme-menu {
    display: block;
}

.theme-menu button {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-base);
    text-align: left;
    border: none;
    background: none;
    color: var(--color-text);
    cursor: pointer;
    min-height: auto;
}

.theme-menu button:hover {
    background: var(--color-primary-hover);
    color: white;
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--spacing-lg) 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: var(--spacing-base);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    font-weight: 600;
    background-color: var(--color-annotation-bg);
}

/* ==========================================================================
   Metadata Panel
   ========================================================================== */

.metadata-panel {
    margin-bottom: var(--spacing-base);
    padding-bottom: var(--spacing-base);
    border-bottom: 1px solid var(--color-border);
}

.metadata {
    color: var(--color-text-secondary);
    margin: var(--spacing-base) 0;
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Navigation Links
   ========================================================================== */

.navigation-link {
    display: inline-block;
    padding: var(--spacing-base) var(--spacing-lg);
    background-color: var(--color-background);
    color: var(--color-primary);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-base);
    transition: background-color var(--transition-base);
}

.navigation-link:hover {
    background-color: var(--color-annotation-bg);
    text-decoration: none;
}

.stream-navigation {
    text-align: center;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-base);
}

/* ==========================================================================
   Responsive: Mobile Dropdown
   ========================================================================== */

@media screen and (max-width: 768px) {
    .channel-dropdown {
        flex-direction: column;
        gap: 0;
    }

    .dropdown-group {
        width: 100%;
    }

    .nav-link-button {
        width: 100%;
        justify-content: center;
        border-radius: 0;
        border-bottom-width: 0;
        border-top-left-radius: var(--border-radius-base);
        border-top-right-radius: var(--border-radius-base);
    }

    .dropdown-toggle {
        width: 100%;
        justify-content: space-between;
        border-radius: 0;
        border-bottom-width: 0;
    }

    .dropdown-group:last-child .dropdown-toggle {
        border-bottom-left-radius: var(--border-radius-base);
        border-bottom-right-radius: var(--border-radius-base);
        border-bottom-width: 1px;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        border-radius: 0;
        margin: 0;
        padding: 0;
        background: var(--color-annotation-bg);
    }

    .dropdown-item {
        padding-left: var(--spacing-lg);
    }

    /* Banner responsive */
    .site-banner {
        padding: var(--spacing-sm) var(--spacing-base);
    }

    .site-banner .site-title {
        font-size: calc(var(--font-size-lg) * 0.8);
    }

    .banner-content {
        flex-direction: column;
    }
}

/* ==========================================================================
   Print Styles for Components
   ========================================================================== */

@media print {
    .theme-switcher,
    .button:not(.view-link),
    .message-actions,
    form,
    .channel-dropdown {
        display: none !important;
    }

    .site-banner {
        background: none;
        border-bottom: 2px solid black;
        padding: var(--spacing-sm);
    }

    .site-banner .site-title {
        color: black;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}