/* Yuki Assistant - Stylesheet */

:root {
    /* Colors - Light Mode (default) */
    --bg-primary: #f5f0ff;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --accent-purple: #b388ff;
    --accent-pink: #f48fb1;
    --accent-gradient: linear-gradient(135deg, #b388ff, #f48fb1);
    --text-primary: #2d2640;
    --text-secondary: #7b6f8a;
    --text-muted: #b0a3c0;
    --border-light: #ede5f7;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-pill: 999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(45, 38, 64, 0.08);
    --shadow-md: 0 4px 12px rgba(45, 38, 64, 0.1);
    --shadow-lg: 0 8px 24px rgba(45, 38, 64, 0.12);
    
    /* Heights */
    --header-height: 60px;
    --subnav-height: 56px;
    --bottom-nav-height: 72px;
}

/* Dark Mode Theme */
html[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #2a2a3e;
    --bg-card: #2a2a3e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --text-muted: #707080;
    --border-light: #3a3a4e;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Login Screen */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--accent-gradient);
}

.login-container {
    width: 100%;
    max-width: 400px;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: 700;
    color: white;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.input-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-group input {
    padding: 12px 16px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 16px;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-purple);
    background: white;
}

.btn-primary {
    padding: 14px 24px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.error-message {
    padding: 12px;
    background: #ffe0e0;
    color: #c41e3a;
    border-radius: var(--radius-sm);
    font-size: 14px;
    text-align: center;
}

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

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.header-content {
    height: var(--header-height);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-content h1 {
    font-size: 20px;
    font-weight: 700;
}

.btn-ghost {
    padding: 8px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

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

/* Sub Navigation */
.sub-nav {
    position: sticky;
    top: var(--header-height);
    z-index: 99;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.sub-nav::-webkit-scrollbar {
    display: none;
}

.sub-nav-pills {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    min-width: min-content;
}

.pill-btn {
    padding: 8px 20px;
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: var(--radius-pill);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.pill-btn:hover {
    background: var(--accent-purple);
    color: white;
}

.pill-btn.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Main Content */
.content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-lg));
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    display: flex;
    box-shadow: 0 -2px 8px rgba(45, 38, 64, 0.08);
    z-index: 100;
}

.nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    padding: 8px;
}

.nav-btn svg {
    transition: all 0.2s;
}

.nav-btn span {
    font-size: 12px;
    font-weight: 600;
}

.nav-btn.active {
    color: var(--accent-purple);
}

.nav-btn.active svg {
    fill: var(--accent-purple);
}

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

/* Cards & Items */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-md);
}

.item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.item:hover {
    box-shadow: var(--shadow-md);
}

.item.used {
    opacity: 0.5;
}

.item-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.badge {
    padding: 4px 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.badge.verified {
    background: #e0f7e0;
    color: #2d7030;
}

.badge.approved {
    background: #e0f0ff;
    color: #1e5a9e;
}

.item-date {
    font-size: 12px;
    color: var(--text-muted);
    margin-left: auto;
}

.item-content {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.5;
}

.item-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-sm {
    padding: 8px 16px;
    background: var(--bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-sm:hover {
    background: var(--accent-purple);
    color: white;
}

.btn-sm.btn-copy {
    background: var(--accent-gradient);
    color: white;
}

.btn-sm.btn-used {
    background: var(--bg-primary);
}

/* Date Group */
.date-group {
    margin-bottom: var(--spacing-xl);
}

.date-header {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

/* Filter Section */
.filter-section {
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.filter-section::-webkit-scrollbar {
    display: none;
}

.filter-chips {
    display: flex;
    gap: var(--spacing-sm);
    padding: 4px 0;
    min-width: min-content;
}

.filter-chip {
    padding: 6px 16px;
    background: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.filter-chip:hover {
    border-color: var(--accent-purple);
}

.filter-chip.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

/* Keywords View */
.keyword-section {
    margin-bottom: var(--spacing-lg);
}

.keyword-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.keyword-header:hover {
    box-shadow: var(--shadow-md);
}

.keyword-title {
    font-size: 16px;
    font-weight: 700;
}

.keyword-toggle {
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.keyword-section.expanded .keyword-toggle {
    transform: rotate(180deg);
}

.keyword-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.keyword-section.expanded .keyword-content {
    max-height: 2000px;
}

.keyword-category {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-sm);
}

.keyword-category h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.keyword-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.keyword-tag {
    padding: 6px 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-pill);
    font-size: 12px;
    color: var(--text-primary);
}

.keyword-tag .count {
    color: var(--text-muted);
    margin-left: 4px;
}

/* Home View */
.summary-section {
    margin-bottom: var(--spacing-xl);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.preview-section {
    margin-bottom: var(--spacing-xl);
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.preview-header h2 {
    font-size: 18px;
    font-weight: 700;
}

.view-all-link {
    color: var(--accent-purple);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.view-all-link:hover {
    text-decoration: underline;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    background: var(--text-primary);
    color: white;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(245, 240, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-light);
    border-top-color: var(--accent-purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* Settings View */
.settings-section {
    margin-bottom: var(--spacing-xl);
}

.settings-section h2 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.settings-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.settings-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-light);
    transition: 0.3s;
    border-radius: 28px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--accent-gradient);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* Change Password Form */
.password-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.password-form .input-group input {
    width: 100%;
}

.password-form .btn-primary {
    margin-top: var(--spacing-sm);
}

/* Expandable Help Sections */
.help-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.help-header {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.2s;
}

.help-header:hover {
    background: var(--bg-primary);
}

.help-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.help-toggle {
    color: var(--text-secondary);
    transition: transform 0.2s;
    font-size: 12px;
}

.help-item.expanded .help-toggle {
    transform: rotate(180deg);
}

.help-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.help-item.expanded .help-content {
    max-height: 500px;
}

.help-body {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Sign Out Button */
.btn-signout {
    width: 100%;
    padding: 14px 24px;
    background: transparent;
    color: #c41e3a;
    border: 2px solid #c41e3a;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-signout:hover {
    background: #c41e3a;
    color: white;
}

/* Desktop Responsive */
@media (min-width: 768px) {
    .content {
        max-width: 800px;
        padding: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }
    
    .bottom-nav {
        position: sticky;
        box-shadow: 0 -2px 8px rgba(45, 38, 64, 0.08);
    }
    
    .toast {
        bottom: var(--spacing-lg);
    }
    
    .summary-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
    
    .card, .item {
        padding: var(--spacing-xl);
    }
    
    .filter-chips {
        flex-wrap: wrap;
    }
    
    .filter-section {
        overflow-x: visible;
    }
}

@media (min-width: 1024px) {
    .header-content h1 {
        font-size: 24px;
    }
    
    .item-content {
        font-size: 15px;
    }
}

/* Print Styles */
@media print {
    .app-header,
    .sub-nav,
    .bottom-nav,
    .toast,
    .loading-overlay {
        display: none !important;
    }
}