/* ==========================================================================
   Prio AI Dashboard — Design System
   ========================================================================== */

/* CSS Variables */
:root {
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --sidebar-width: 260px;
    --header-height: 60px;
    
    --transition-fast: 120ms ease;
    --transition-base: 200ms ease;
    
    --brand-hue: 145;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-elevated: #222222;
    --bg-sidebar: #0d0d0d;
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.45);
    
    --border-primary: rgba(255, 255, 255, 0.1);
    --border-secondary: rgba(255, 255, 255, 0.06);
    
    --accent: hsl(var(--brand-hue), 75%, 55%);
    --accent-hover: hsl(var(--brand-hue), 75%, 62%);
    --accent-muted: hsla(var(--brand-hue), 60%, 55%, 0.15);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f4f4f5;
    --bg-elevated: #ffffff;
    --bg-sidebar: #fafafa;
    
    --text-primary: #09090b;
    --text-secondary: rgba(9, 9, 11, 0.7);
    --text-tertiary: rgba(9, 9, 11, 0.45);
    
    --border-primary: rgba(9, 9, 11, 0.1);
    --border-secondary: rgba(9, 9, 11, 0.06);
    
    --accent: hsl(var(--brand-hue), 72%, 42%);
    --accent-hover: hsl(var(--brand-hue), 72%, 36%);
    --accent-muted: hsla(var(--brand-hue), 60%, 45%, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-secondary);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
}

.sidebar.open {
    transform: translateX(0);
}

@media (min-width: 1024px) {
    .sidebar {
        transform: translateX(0);
    }
}

.sidebar-header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-logo {
    height: 28px;
}

.sidebar-close {
    display: flex;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 24px;
}

@media (min-width: 1024px) {
    .sidebar-close {
        display: none;
    }
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--space-6);
}

.nav-section-title {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-1);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.nav-item.active {
    background: var(--accent-muted);
    color: var(--accent);
}

.nav-item-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--border-secondary);
}

.sidebar-footer-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.sidebar-footer-row .user-card {
    flex: 1;
    min-width: 0;
}

.notification-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    position: relative;
    transition: all var(--transition-fast);
}

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

.notification-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    min-width: 16px;
    height: 16px;
    background: #ef4444;
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.user-card {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-sm);
    overflow: hidden;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: var(--text-sm);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

@media (min-width: 1024px) {
    .main-content {
        margin-left: var(--sidebar-width);
    }
}

/* Header */
.header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-5);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.menu-toggle {
    display: flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
}

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

@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

.header-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.header-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--space-6);
}

@media (min-width: 768px) {
    .page-content {
        padding: var(--space-8);
    }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-weight: 500;
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background: var(--accent);
    color: #000;
}

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

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

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

.btn-ghost {
    color: var(--text-secondary);
}

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

/* ==========================================================================
   Auth Modal
   ========================================================================== */

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--space-5);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 420px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 24px;
    border-radius: var(--radius-sm);
}

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

.modal-content {
    padding: var(--space-8);
}

.modal-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.modal-logo {
    height: 32px;
    margin: 0 auto var(--space-5);
}

.modal-header h2 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-2);
}

.modal-header p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* Forms */
.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.form-group input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

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

.form-error {
    font-size: var(--text-sm);
    color: #ef4444;
    margin-top: var(--space-2);
    display: none;
}

.form-error:not(:empty) {
    display: block;
}

.form-success {
    font-size: var(--text-sm);
    color: var(--accent);
    margin-top: var(--space-2);
    display: none;
}

.form-success:not(:empty) {
    display: block;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: var(--space-5) 0;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-primary);
}

.auth-divider span {
    padding: 0 var(--space-4);
}

.auth-footer {
    margin-top: var(--space-5);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent);
    font-weight: 500;
}

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

/* Google button */
.btn-google {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

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

.btn-google svg {
    width: 18px;
    height: 18px;
    margin-right: var(--space-2);
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-container {
    overflow-x: auto;
}

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

th, td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border-secondary);
}

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

td {
    font-size: var(--text-sm);
}

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

/* ==========================================================================
   Utilities
   ========================================================================== */

.hidden {
    display: none !important;
}

.text-muted {
    color: var(--text-tertiary);
}

.text-center {
    text-align: center;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

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

@media (min-width: 1024px) {
    .sidebar-overlay {
        display: none !important;
    }
}

/* ==========================================================================
   Overview Page
   ========================================================================== */

.welcome-banner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.welcome-text h2 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2);
}

.welcome-text p {
    color: var(--text-secondary);
}

.welcome-date {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--border-primary);
}

.stat-card.accent {
    background: var(--accent-muted);
    border-color: var(--accent);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--space-1);
}

.stat-label {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.section-header h3 {
    font-size: var(--text-lg);
    font-weight: 600;
}

.section-link {
    font-size: var(--text-sm);
    color: var(--accent);
    font-weight: 500;
}

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

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
    .quick-actions {
        grid-template-columns: repeat(4, 1fr);
    }
}

.quick-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-5);
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.quick-action:hover {
    border-color: var(--accent);
    background: var(--accent-muted);
}

.quick-action-icon {
    font-size: 1.5rem;
}

.quick-action-text {
    font-size: var(--text-sm);
    font-weight: 500;
}

/* Activity List */
.activity-list {
    min-height: 100px;
}

.activity-empty {
    text-align: center;
    padding: var(--space-8);
    color: var(--text-tertiary);
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-secondary);
}

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

.activity-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 50%;
    font-size: 1rem;
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.activity-time {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* ==========================================================================
   PRIO Page
   ========================================================================== */

.prio-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.prio-header-text h2 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2);
}

.prio-header-text p {
    color: var(--text-secondary);
}

.prio-stat {
    text-align: right;
}

.prio-stat-value {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--accent);
}

.prio-stat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* PRIO Filters */
.prio-filters {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
    flex-wrap: wrap;
}

.prio-filter {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.prio-filter:hover {
    border-color: var(--border-primary);
    color: var(--text-primary);
}

.prio-filter.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #000;
}

/* PRIO List */
.prio-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.prio-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    gap: var(--space-4);
    color: var(--text-secondary);
}

.prio-empty {
    text-align: center;
    padding: var(--space-12);
    color: var(--text-tertiary);
}

.prio-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.prio-card:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.prio-card.hot {
    border-left: 3px solid #ef4444;
}

.prio-card.warm {
    border-left: 3px solid #f59e0b;
}

.prio-card.new {
    border-left: 3px solid var(--accent);
}

.prio-rank {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 50%;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.prio-card.hot .prio-rank {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.prio-card.warm .prio-rank {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.prio-info {
    flex: 1;
    min-width: 0;
}

.prio-name {
    font-weight: 600;
    margin-bottom: var(--space-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.prio-details {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.prio-score {
    text-align: right;
}

.prio-score-value {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--accent);
}

.prio-score-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.prio-actions {
    display: flex;
    gap: var(--space-2);
}

.prio-action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.prio-action-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Loading states */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    gap: var(--space-4);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-primary);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Toast */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    animation: slideIn 0.2s ease;
}

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

.toast.error {
    border-color: #ef4444;
    color: #ef4444;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}