/* Google Photos Style - Light & Dark Mode */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e8eaed;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-tertiary: #80868b;
    --border-color: #dadce0;
    --hover-bg: #f1f3f4;
    --active-bg: #e8f0fe;
    --active-text: #1967d2;
    --primary-blue: #1967d2;
    --primary-blue-hover: #1557b0;
    --shadow: rgba(60, 64, 67, 0.3);
    --shadow-lg: rgba(60, 64, 67, 0.15);
    --overlay: rgba(32, 33, 36, 0.6);
}

.dark-mode {
    /* Dark Mode Colors */
    --bg-primary: #202124;
    --bg-secondary: #292a2d;
    --bg-tertiary: #35363a;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --text-tertiary: #5f6368;
    --border-color: #3c4043;
    --hover-bg: #2d2e30;
    --active-bg: #3c4043;
    --active-text: #8ab4f8;
    --primary-blue: #8ab4f8;
    --primary-blue-hover: #aecbfa;
    --shadow: rgba(0, 0, 0, 0.5);
    --shadow-lg: rgba(0, 0, 0, 0.3);
    --overlay: rgba(32, 33, 36, 0.9);
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}

/* Loading */
.loading {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 9999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: #1a73e8;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading p {
    margin-top: 16px;
    color: var(--text-secondary);
}

/* Authentication */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-secondary);
}

.auth-box {
    width: 100%;
    max-width: 450px;
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 48px 40px 36px;
    box-shadow: 0 1px 3px var(--shadow), 0 4px 8px var(--shadow);
}

.auth-logo {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
}

.auth-logo {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.auth-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.auth-logo .material-icons {
    font-size: 48px;
    color: var(--text-secondary);
}

.auth-box h1 {
    text-align: center;
    font-size: 28px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--primary-blue);
    letter-spacing: -0.5px;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 15px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.auth-form input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.auth-form input:focus {
    outline: none;
    border-color: #1a73e8;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 4px;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    font-weight: 500;
}

.btn-primary:hover {
    background: var(--primary-blue-hover);
    box-shadow: 0 1px 2px 0 rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
}

.btn-primary:active {
    background: var(--primary-blue-hover);
    box-shadow: 0 1px 2px 0 rgba(60,64,67,.3), 0 2px 6px 2px rgba(60,64,67,.15);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--hover-bg);
}

.auth-link {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 12px;
}

.auth-link a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}

.auth-link a:hover {
    text-decoration: underline;
}

.verify-message {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 20px;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* App Bar */
.app-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 2px 0 var(--shadow);
}

.app-bar-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    color: var(--text-secondary);
}

.app-logo .material-icons {
    font-size: 32px;
    color: var(--primary-blue);
}

.app-logo span:last-child {
    font-weight: 400;
    color: var(--text-primary);
}

.search-bar {
    flex: 1;
    max-width: 720px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    transition: background-color 0.2s;
}

.search-bar:focus-within {
    background: var(--hover-bg);
}

.search-bar .material-icons {
    color: var(--text-secondary);
    font-size: 20px;
}

.search-bar input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--text-primary);
    outline: none;
}

.app-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    width: 48px;
    height: 48px;
    border: none;
    background: transparent;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.icon-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.icon-btn.active {
    background: var(--active-bg);
    color: var(--active-text);
}

.icon-btn .material-icons {
    font-size: 24px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s;
}

.user-avatar:hover {
    box-shadow: 0 1px 2px 0 rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
    transform: scale(1.05);
}

/* User Menu */
.user-menu {
    position: fixed;
    top: 72px;
    right: 20px;
    width: 300px;
    background: var(--bg-primary);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow), 0 8px 16px var(--shadow-lg);
    display: none;
    z-index: 1000;
    overflow: hidden;
}

.user-menu.show {
    display: block;
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-menu-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-avatar-large {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #1a73e8;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 20px;
}

.user-email {
    color: var(--text-primary);
    font-size: 14px;
}

.user-menu-item {
    width: 100%;
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.user-menu-item:hover {
    background: var(--hover-bg);
}

.user-menu-item .material-icons {
    font-size: 20px;
    color: var(--text-secondary);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 64px;
    width: 256px;
    height: calc(100vh - 64px);
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    padding: 8px 0;
    overflow-y: auto;
    transition: transform 0.3s;
    z-index: 50;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 12px 24px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 0 24px 24px 0;
    margin-right: 8px;
    margin-left: 12px;
    transition: all 0.2s;
    font-size: 14px;
    font-weight: 500;
}

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

.nav-item.active {
    background: var(--active-bg);
    color: var(--active-text);
}

.nav-item.active .material-icons {
    color: var(--active-text);
}

.nav-item .material-icons {
    font-size: 20px;
    color: var(--text-secondary);
}

.nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 16px;
}

.storage-widget {
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-secondary);
}

.storage-widget .material-icons {
    font-size: 24px;
}

.storage-label {
    font-size: 12px;
    text-transform: uppercase;
}

.storage-value {
    font-size: 14px;
}

/* Main Content */
.main-content {
    margin-left: 256px;
    margin-top: 64px;
    padding: 24px;
    min-height: calc(100vh - 64px);
    background: var(--bg-primary);
}

/* Gallery */
.gallery-container {
    max-width: 1600px;
    margin: 0 auto;
}

.gallery-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.gallery-toolbar h1 {
    font-size: 32px;
    font-weight: 400;
    color: var(--text-primary);
}

.view-toggle {
    display: flex;
    gap: 4px;
}

.view-toggle .icon-btn.active {
    background: var(--active-bg);
    color: var(--active-text);
}

.gallery {
    display: grid;
    gap: 8px;
}

.gallery.comfortable-view {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.gallery.compact-view {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.gallery-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    background: var(--bg-secondary);
    transition: all 0.2s;
}

.gallery-item:hover {
    box-shadow: 0 1px 2px 0 rgba(60,64,67,.3), 0 2px 6px 2px rgba(60,64,67,.15);
    transform: translateY(-2px);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.gallery-item:hover img {
    transform: scale(1.03);
}

.gallery-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
    opacity: 0;
    transition: opacity 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

.gallery-item-info {
    color: white;
    font-size: 14px;
}

.gallery-item-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 8px;
}

.tag-chip-small {
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 16px;
    font-size: 11px;
    font-weight: 500;
    color: #202124;
    backdrop-filter: blur(8px);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
}

.empty-state .material-icons {
    font-size: 80px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.empty-state h2 {
    font-size: 24px;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* Dialogs */
.dialog {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.dialog.show {
    display: flex;
}

.dialog-overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay);
}

.dialog-card {
    position: relative;
    width: 90%;
    max-width: 600px;
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 8px 10px 1px rgba(0,0,0,0.14), 0 3px 14px 2px rgba(0,0,0,0.12), 0 5px 5px -3px rgba(0,0,0,0.2);
    max-height: 90vh;
    overflow: auto;
    animation: modalSlideIn 0.2s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.dialog-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.dialog-header h2 {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
}

.dialog-body {
    padding: 24px;
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 48px 24px;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.upload-zone:hover {
    border-color: var(--primary-blue);
    background: var(--bg-secondary);
}

.upload-zone.drag-over {
    border-color: var(--primary-blue);
    background: var(--active-bg);
    border-style: solid;
}

.upload-zone .material-icons {
    font-size: 64px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.upload-zone h3 {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.upload-zone p {
    color: var(--text-secondary);
    margin: 8px 0;
}

.upload-info {
    font-size: 12px !important;
    color: var(--text-tertiary) !important;
}

.upload-progress {
    margin-top: 24px;
}

.upload-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 8px;
}

.upload-item img {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: 4px;
}

.upload-item-info {
    flex: 1;
}

.upload-item-name {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.upload-item-progress {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.upload-item-progress-bar {
    height: 100%;
    background: #1a73e8;
    transition: width 0.3s;
}

.upload-item-status {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Search Panel */
.search-panel {
    position: fixed;
    right: 0;
    top: 64px;
    width: 100%;
    max-width: 400px;
    height: calc(100vh - 64px);
    background: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    transform: translateX(100%);
    transition: transform 0.3s;
    z-index: 200;
    overflow-y: auto;
}

.search-panel.show {
    transform: translateX(0);
}

.panel-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-header h2 {
    font-size: 20px;
    font-weight: 500;
}

.panel-body {
    padding: 24px;
}

.search-field {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 24px;
}

.search-field .material-icons {
    color: var(--text-secondary);
}

.search-field input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--text-primary);
    outline: none;
}

.filters-section h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 16px;
}

.switch-label {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    cursor: pointer;
}

.switch-label input {
    display: none;
}

.switch {
    width: 36px;
    height: 20px;
    background: var(--border-color);
    border-radius: 10px;
    position: relative;
    transition: background-color 0.3s;
}

.switch::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
}

.switch-label input:checked + .switch {
    background: var(--primary-blue);
}

.switch-label input:checked + .switch::after {
    transform: translateX(16px);
}

.date-range {
    margin-top: 20px;
}

.date-range label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.date-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.date-inputs input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.panel-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    display: none;
    z-index: 2000;
}

.modal.show {
    display: block;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay);
}

.modal-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.modal-header {
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.modal-actions {
    display: flex;
    gap: 4px;
}

.modal-actions .icon-btn {
    color: var(--text-primary);
}

.modal-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.modal-image {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: var(--bg-secondary);
}

.modal-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
}

.modal-info {
    width: 360px;
    background: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 24px;
}

.info-section {
    margin-bottom: 32px;
}

.info-section h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-section h3 .material-icons {
    font-size: 18px;
}

.info-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.info-item .material-icons {
    color: var(--text-secondary);
    font-size: 20px;
}

.info-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.info-value {
    font-size: 14px;
    color: var(--text-primary);
    word-break: break-word;
}

.tag-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-chip {
    padding: 6px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.2s;
}

.tag-chip:hover {
    background: var(--hover-bg);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.ai-info {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.ai-info-item {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.ai-info-item:last-child {
    border-bottom: none;
}

.ai-info-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}

.ai-info-value {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .modal-body {
        flex-direction: column;
    }
    
    .modal-info {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
}

@media (max-width: 768px) {
    .app-bar {
        padding: 8px 12px;
    }
    
    .search-bar {
        display: none;
    }
    
    .gallery.comfortable-view {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .gallery.compact-view {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}