/* Main CSS - Google Chat Space Viewer */

/* CSS Variables */
:root {
    /* Colors - Light Theme */
    --primary-color: #1a73e8;
    --primary-hover: #1765cc;
    --primary-light: #e8f0fe;
    --secondary-color: #5f6368;
    --background: #ffffff;
    --surface: #f8f9fa;
    --surface-variant: #f1f3f4;
    --on-surface: #202124;
    --on-surface-variant: #5f6368;
    --divider: #dadce0;
    --error: #d93025;
    --success: #1e8e3e;
    --warning: #f9ab00;
    
    /* Shadows */
    --shadow-1: 0 1px 2px 0 rgba(60,64,67,0.3), 0 1px 3px 1px rgba(60,64,67,0.15);
    --shadow-2: 0 1px 3px 0 rgba(60,64,67,0.3), 0 4px 8px 3px rgba(60,64,67,0.15);
    --shadow-3: 0 4px 6px 0 rgba(60,64,67,0.3), 0 8px 16px 4px rgba(60,64,67,0.15);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    
    /* Layout */
    --header-height: 64px;
    --sidebar-width: 320px;
    --sidebar-collapsed: 64px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --primary-color: #8ab4f8;
    --primary-hover: #aecbfa;
    --primary-light: #1e3a5f;
    --secondary-color: #9aa0a6;
    --background: #202124;
    --surface: #292a2d;
    --surface-variant: #35363a;
    --on-surface: #e8eaed;
    --on-surface-variant: #9aa0a6;
    --divider: #3c4043;
    --error: #f28b82;
    --success: #81c995;
    --warning: #fdd663;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--on-surface);
    background-color: var(--background);
    height: 100%;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }
h4 { font-size: var(--font-size-base); }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Layout */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--surface);
    border-bottom: 1px solid var(--divider);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    z-index: 1000;
    box-shadow: var(--shadow-1);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
    max-width: 680px;
    margin: 0 auto;
}

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

.app-title {
    font-size: var(--font-size-lg);
    font-weight: 400;
    color: var(--on-surface);
}

/* Search */
.search-container {
    position: relative;
    width: 100%;
    max-width: 100%;
}

.global-search {
    width: 100%;
    height: 48px;
    padding: 0 48px;
    border: none;
    border-radius: var(--radius-lg);
    background-color: var(--surface-variant);
    font-size: var(--font-size-base);
    color: var(--on-surface);
    transition: all var(--transition-base);
}

.global-search:focus {
    outline: none;
    background-color: var(--background);
    box-shadow: var(--shadow-2);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--on-surface-variant);
    pointer-events: none;
}

.search-clear {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: var(--spacing-xs);
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--on-surface-variant);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.global-search:not(:placeholder-shown) ~ .search-clear {
    opacity: 1;
    visibility: visible;
}

/* Buttons */
button {
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
}

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

.button.primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-1);
}

.button.secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--divider);
}

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

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

.button.danger:hover {
    background-color: #b71c1c;
    box-shadow: var(--shadow-1);
}

.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--on-surface-variant);
    transition: all var(--transition-fast);
}

.icon-button:hover {
    background-color: var(--surface-variant);
}

.icon-button.small {
    width: 32px;
    height: 32px;
}

.icon-button .material-icons {
    font-size: 20px;
}

.menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    padding: 0;
    border: none;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--on-surface-variant);
    transition: all var(--transition-fast);
}

.menu-toggle:hover {
    background-color: var(--surface-variant);
}

/* App Container */
.app-container {
    display: flex;
    height: calc(100vh - var(--header-height));
    margin-top: var(--header-height);
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    min-width: 200px;
    max-width: 600px;
    background-color: var(--surface);
    border-right: 1px solid var(--divider);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    transition: width 0.3s ease;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

/* Sidebar resize handle */
.sidebar-resize-handle {
    position: absolute;
    right: -2px;
    top: 0;
    bottom: 0;
    width: 6px;
    background-color: transparent;
    cursor: ew-resize;
    z-index: 10;
    transition: background-color var(--transition-fast);
}

.sidebar-resize-handle:hover,
.sidebar-resize-handle.active {
    background-color: var(--primary-color);
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
}

.sidebar-title {
    font-size: calc(var(--font-size-lg) * 0.5);
    font-weight: 400;
}

.sidebar-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--divider);
    background-color: var(--surface);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--background);
    overflow: hidden;
    position: relative;
}


/* Loading Spinner */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
}

/* Ensure loading spinners are visible when not hidden */
.loading-spinner:not([hidden]) {
    display: flex !important;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--divider);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Error Container */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    text-align: center;
}

.error-icon {
    font-size: 48px;
    color: var(--error);
}

.error-message {
    color: var(--on-surface-variant);
    max-width: 400px;
    word-wrap: break-word;
    line-height: 1.5;
}

.retry-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--divider);
    border-radius: var(--radius-sm);
    background-color: transparent;
    color: var(--primary-color);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

/* Ensure error containers are always visible when not hidden */
.error-container:not([hidden]) {
    display: flex !important;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    background-color: var(--background);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-3);
    display: flex;
    flex-direction: column;
    animation: slideIn var(--transition-base);
}

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

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 400;
}

.modal-close {
    background: none;
    border: none;
    padding: var(--spacing-xs);
    border-radius: var(--radius-full);
    color: var(--on-surface-variant);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--surface-variant);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    background-color: var(--surface);
    color: var(--on-surface);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-2);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 280px;
    max-width: 500px;
    pointer-events: auto;
    animation: slideUp var(--transition-base);
}

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

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

.toast.warning {
    background-color: var(--warning);
    color: var(--on-surface);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -48%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

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

/* Utilities */
.hidden {
    display: none !important;
}

[hidden] {
    display: none !important;
}

.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) {
    .header-center {
        display: none;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
        top: var(--header-height);
        bottom: 0;
        z-index: 999;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-3);
    }
    
    .app-container {
        margin-left: 0;
    }
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--divider);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--on-surface-variant);
}

/* Welcome Section */
.welcome-section {
    flex: 1;
    display: none; /* Hidden by default since we auto-select first space */
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: var(--bg-primary);
}

.welcome-content {
    text-align: center;
    max-width: 600px;
}

.welcome-icon {
    font-size: 64px;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.welcome-title {
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.welcome-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.welcome-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    text-align: left;
    transition: transform 0.2s;
}

.feature-item:hover {
    transform: translateX(4px);
}

.feature-item .material-icons {
    font-size: 24px;
    color: var(--primary-color);
}

.feature-item span:last-child {
    font-size: 1rem;
    color: var(--text-primary);
}

/* Print Styles */
@media print {
    .app-header,
    .sidebar,
    .icon-button,
    .modal {
        display: none !important;
    }
    
    .main-content {
        margin: 0;
    }
}