/* Mokuro WebDAV - Shared Design System */
/* Matching Mokuro Reader aesthetic */

:root {
    /* Backgrounds - Dark theme */
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2d2d2d;
    --bg-elevated: #333333;
    --bg-hover: #3a3a3a;

    /* Header */
    --header-bg: #2d3a36;

    /* Primary accent - Teal/Mint (from Mokuro) */
    --accent-primary: #4a9e8f;
    --accent-primary-hover: #5cb3a3;
    --accent-primary-muted: rgba(74, 158, 143, 0.15);
    --accent-primary-dark: #3d8577;

    /* Secondary accent - Pink/Salmon (from Mokuro) */
    --accent-secondary: #d4a4a4;
    --accent-secondary-hover: #e0b4b4;
    --accent-secondary-muted: rgba(212, 164, 164, 0.15);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #707070;
    --text-placeholder: #606060;

    /* Borders */
    --border-subtle: #333333;
    --border-default: #444444;
    --border-focus: var(--accent-primary);

    /* Status colors */
    --success: #4ade80;
    --success-muted: rgba(74, 222, 128, 0.15);
    --warning: #fbbf24;
    --warning-muted: rgba(251, 191, 36, 0.15);
    --error: #f87171;
    --error-muted: rgba(248, 113, 113, 0.15);
    --info: #60a5fa;
    --info-muted: rgba(96, 165, 250, 0.15);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* ============================================
   HEADER COMPONENT
   ============================================ */

.mokuro-header {
    background: var(--header-bg);
    padding: 0 1rem;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.mokuro-header__brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
}

.mokuro-header__logo {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mokuro-header__logo svg {
    width: 100%;
    height: 100%;
}

.mokuro-header__title {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.mokuro-header__nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mokuro-header__nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mokuro-header__nav-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.mokuro-header__nav-btn svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   SEARCH BAR
   ============================================ */

.search-bar {
    display: flex;
    align-items: center;
    background: var(--accent-primary-muted);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    gap: 0.5rem;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.search-bar:focus-within {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.search-bar__icon {
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-bar__icon svg {
    width: 18px;
    height: 18px;
}

.search-bar__input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.search-bar__input::placeholder {
    color: var(--text-placeholder);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn--primary {
    background: var(--accent-primary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.btn--primary:hover:not(:disabled) {
    background: var(--accent-primary-hover);
    border-color: var(--accent-primary-hover);
}

.btn--secondary {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-default);
}

.btn--secondary:hover:not(:disabled) {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: var(--bg-hover);
}

.btn--danger {
    background: transparent;
    color: var(--accent-secondary);
    border-color: var(--border-default);
}

.btn--danger:hover:not(:disabled) {
    color: var(--error);
    border-color: var(--error);
    background: var(--error-muted);
}

.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 0.375rem 0.75rem;
}

.btn--ghost:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.btn--sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.btn--lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn--full {
    width: 100%;
}

/* ============================================
   FORM INPUTS
   ============================================ */

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder {
    color: var(--text-placeholder);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-muted);
}

.form-input--error {
    border-color: var(--error);
}

.form-input--error:focus {
    box-shadow: 0 0 0 3px var(--error-muted);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.form-error {
    font-size: 0.75rem;
    color: var(--error);
    margin-top: 0.25rem;
}

.form-select {
    width: 100%;
    padding: 0.625rem 2rem 0.625rem 0.875rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23707070' stroke-width='2' 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;
    transition: border-color var(--transition-fast);
}

.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.card--elevated {
    background: var(--bg-tertiary);
}

.card--interactive {
    cursor: pointer;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.card--interactive:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ============================================
   TABLES
   ============================================ */

.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

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

.table th,
.table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

.table th {
    background: var(--bg-tertiary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.table td {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background: var(--bg-hover);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge--success {
    background: var(--success-muted);
    color: var(--success);
}

.badge--warning {
    background: var(--warning-muted);
    color: var(--warning);
}

.badge--error {
    background: var(--error-muted);
    color: var(--error);
}

.badge--info {
    background: var(--info-muted);
    color: var(--info);
}

.badge--muted {
    background: var(--bg-elevated);
    color: var(--text-muted);
}

/* ============================================
   MODALS
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-overlay.open .modal {
    transform: scale(1);
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.modal__title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal__close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.25rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.modal__close:hover {
    color: var(--text-primary);
}

.modal__body {
    margin-bottom: 1.5rem;
}

.modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* ============================================
   TABS
   ============================================ */

.tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    margin-bottom: -1px;
}

.tab:hover {
    color: var(--text-secondary);
}

.tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 0.75rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast--success {
    border-color: var(--success);
    background: var(--success-muted);
}

.toast--error {
    border-color: var(--error);
    background: var(--error-muted);
}

/* ============================================
   VOLUME GRID (Mokuro-style catalog)
   ============================================ */

.volume-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

.volume-card {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.volume-card:hover {
    transform: translateY(-4px);
}

.volume-card__cover {
    position: relative;
    aspect-ratio: 2/3;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-tertiary);
}

.volume-card__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.volume-card__cover--stacked {
    position: relative;
}

.volume-card__cover--stacked::before,
.volume-card__cover--stacked::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.volume-card__cover--stacked::before {
    transform: rotate(3deg) translate(4px, -4px);
    z-index: -2;
}

.volume-card__cover--stacked::after {
    transform: rotate(1.5deg) translate(2px, -2px);
    z-index: -1;
}

.volume-card__title {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.volume-card__count {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Placeholder for missing covers */
.volume-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-elevated) 100%);
    color: var(--text-muted);
}

.volume-card__placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid;
    margin-bottom: 1rem;
}

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

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

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

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

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent-primary); }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .volume-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 1rem;
    }

    .mokuro-header {
        padding: 0 0.75rem;
    }

    .modal {
        margin: 1rem;
        max-width: calc(100% - 2rem);
    }
}

@media (max-width: 480px) {
    .volume-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab {
        flex-shrink: 0;
    }
}