/* ===== GLOBAL VARIABLES ===== */
:root {
    /* Colors - will be overridden by themes.css */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e0e0e0;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent: #0066cc;
    --accent-hover: #0052a3;
    --border: #cccccc;
    --shadow: rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Layout */
    --header-height: 60px;
    --sidebar-width: 280px;
    --panel-width: 320px;

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'Courier Prime', 'Courier New', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* ===== RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== BASE ===== */
body {
    font-family: var(--font-system);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    transition: background var(--transition-normal), color var(--transition-normal);
}

/* ===== HEADER ===== */
.header {
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 100;
}

.header-left {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-center {
    flex: 1;
    max-width: 600px;
    margin: 0 var(--spacing-lg);
}

.search-container {
    position: relative;
    width: 100%;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    opacity: 0.5;
}

.header-right {
    flex: 0 0 auto;
    display: flex;
    gap: var(--spacing-sm);
}

.icon-button {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.icon-button:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

.icon-button:active {
    transform: translateY(0);
}

.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    background: var(--bg-primary);
    cursor: pointer;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
    gap: 4px;
    transition: all var(--transition-fast);
    -webkit-appearance: none;
    appearance: none;
    position: relative;
    z-index: 1000;
}

.mobile-menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
    background: var(--bg-tertiary);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== MAIN CONTAINER ===== */
.main-container {
    display: flex;
    height: calc(100vh - var(--header-height));
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.sidebar-header h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

/* Navigation Tree */
.nav-tree {
    list-style: none;
}

.nav-item {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 6px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.nav-link:hover {
    background: var(--bg-tertiary);
}

.nav-link.active {
    background: var(--accent);
    color: white;
}

.nav-icon {
    font-size: 1rem;
}

.nav-label {
    flex: 1;
}

.nav-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.nav-toggle.expanded {
    transform: rotate(90deg);
}

.nav-children {
    margin-left: var(--spacing-lg);
    margin-top: var(--spacing-xs);
    display: none;
}

.nav-children.expanded {
    display: block;
}

/* ===== CONTENT ===== */
.content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
    background: var(--bg-primary);
}

.breadcrumbs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb-separator {
    opacity: 0.5;
}

.breadcrumb-link {
    color: var(--accent);
    text-decoration: none;
}

.breadcrumb-link:hover {
    text-decoration: underline;
}

/* Welcome Screen */
.welcome-screen {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.welcome-screen h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.welcome-screen > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.feature-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.keyboard-shortcuts {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    max-width: 600px;
}

.keyboard-shortcuts h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.keyboard-shortcuts td {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

.keyboard-shortcuts td:first-child {
    width: 140px;
}

kbd {
    display: inline-block;
    padding: 2px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-primary);
    font-family: var(--font-system);
    font-size: 0.85rem;
    margin-right: var(--spacing-xs);
}

/* Script Content */
.script-content {
    max-width: 900px;
    margin: 0 auto;
}

.hidden {
    display: none !important;
}

/* ===== RIGHT PANEL ===== */
.right-panel {
    width: var(--panel-width);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    font-size: 1rem;
    color: var(--text-primary);
}

.close-button {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.close-button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* ===== SEARCH RESULTS ===== */
.search-results {
    position: absolute;
    top: calc(var(--header-height) + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - var(--sidebar-width) - 100px);
    max-width: 700px;
    max-height: 500px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 24px var(--shadow);
    overflow-y: auto;
    z-index: 200;
}

.search-result-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--bg-secondary);
}

.search-result-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.search-result-context {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    white-space: pre-wrap;
}

.search-result-meta {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
}

/* ===== LOADING ===== */
.loading {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
}

.spinner {
    display: inline-block;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.spinner-large {
    font-size: 3rem;
    animation: spin 1s linear infinite;
}

.loading-overlay p {
    color: white;
    margin-top: var(--spacing-md);
    font-size: 1.1rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }

    .right-panel {
        width: 280px;
    }
}

/* Support for iOS devices */
@supports (-webkit-touch-callout: none) {
    @media (max-width: 768px) {
        .mobile-menu-toggle {
            display: -webkit-flex !important;
            display: flex !important;
        }
    }
}

@media (max-width: 768px) {
    /* Ensure hamburger menu is visible in header */
    .header-left {
        display: flex !important;
        visibility: visible !important;
    }

    .header-left .mobile-menu-toggle {
        display: -webkit-flex !important;
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }

    .sidebar {
        position: fixed;
        left: -280px;
        top: var(--header-height);
        bottom: 0;
        width: 280px;
        z-index: 200;
        transition: left var(--transition-normal);
        box-shadow: 4px 0 12px var(--shadow);
    }

    .sidebar.mobile-open {
        left: 0;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 199;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .mobile-menu-toggle {
        display: -webkit-flex !important;
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }

    .content {
        margin-left: 0;
        width: 100%;
    }

    .screenplay {
        padding: var(--spacing-md);
        font-size: 11pt;
    }

    .header-center {
        margin: 0 var(--spacing-sm);
    }

    .search-input {
        font-size: 0.85rem;
        padding: var(--spacing-xs) var(--spacing-sm);
        padding-left: 30px;
    }

    .search-icon {
        left: 8px;
    }

    .header-right {
        gap: 4px;
    }

    .header-right .icon-button {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .logo {
        font-size: 1rem;
    }

    .feature-card {
        padding: var(--spacing-md);
    }
}

    .right-panel {
        position: fixed;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        width: 100%;
        max-width: 400px;
        z-index: 150;
        box-shadow: -4px 0 12px var(--shadow);
    }

    .header-center {
        margin: 0 var(--spacing-md);
    }

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

@media (max-width: 480px) {
    .header {
        padding: 0 var(--spacing-sm);
    }

    .logo {
        font-size: 0.9rem;
    }

    .header-left {
        gap: var(--spacing-sm);
    }

    .header-center {
        margin: 0 var(--spacing-xs);
        flex: 1;
        min-width: 0;
    }

    .search-input {
        font-size: 0.8rem;
        padding: 6px 8px 6px 28px;
    }

    .header-right {
        gap: 2px;
    }

    .icon-button {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .mobile-menu-toggle {
        width: 32px;
        height: 32px;
    }

    .content {
        padding: var(--spacing-sm);
    }

    .screenplay {
        padding: var(--spacing-sm);
        font-size: 10pt;
        max-width: 100%;
    }

    .scene-heading {
        font-size: 10pt;
        margin-top: 1em;
        margin-bottom: 0.5em;
    }

    .dialogue {
        padding-left: 0.5in;
        padding-right: 0.5in;
    }

    .character {
        padding-left: 0.25in;
        padding-right: 0.25in;
    }

    .welcome-screen {
        padding: var(--spacing-md);
    }

    .welcome-screen h1 {
        font-size: 1.5rem;
    }

    .features {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .feature-card {
        padding: var(--spacing-md);
    }

    .keyboard-shortcuts {
        padding: var(--spacing-md);
    }
}

/* ===== CHARACTER PANEL ===== */
.character-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.character-item {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.character-item:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 8px var(--shadow);
}

.character-name {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.character-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.character-stat {
    display: flex;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    color: var(--accent);
    font-weight: 600;
}

.character-button {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--accent);
    border-radius: 6px;
    background: transparent;
    color: var(--accent);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.character-button:hover {
    background: var(--accent);
    color: white;
}

.character-details {
    padding: var(--spacing-md) 0;
}

.character-stat-large {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.stat-value-large {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
}

.character-button-primary {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-md);
}

.character-button-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.character-button-secondary {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-lg);
}

.character-button-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.scene-list {
    list-style: none;
    padding: 0;
    max-height: 300px;
    overflow-y: auto;
}

.scene-list li {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.scene-list li:last-child {
    border-bottom: none;
}

/* ===== ANIMATIONS ===== */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}