/* ===============================================
   Variables CSS
   =============================================== */
:root {
    --primary-color: #3788d8;
    --primary-dark: #2563a8;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #dee2e6;
    --text-dark: #212529;
    --text-muted: #6c757d;
    
    --sidebar-width: 260px;
    --header-height: 70px;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

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

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===============================================
   Container & Layout
   =============================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===============================================
   Buttons
   =============================================== */
.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
    color: white;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

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

.btn-link {
    color: var(--primary-color);
    background: transparent;
    padding: 10px 15px;
}

/* ===============================================
   Landing Page - Header
   =============================================== */
.landing-page .header {
    background-color: white;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo i {
    font-size: 28px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links a {
    color: var(--text-dark);
    font-weight: 500;
}

/* ===============================================
   Landing Page - Hero
   =============================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

.hero-note {
    font-size: 14px;
    opacity: 0.8;
}

/* ===============================================
   Landing Page - Features
   =============================================== */
.features {
    padding: 80px 0;
    background-color: white;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.8;
}

/* ===============================================
   Landing Page - CTA
   =============================================== */
.cta {
    background-color: var(--bg-light);
    padding: 80px 0;
    text-align: center;
}

.cta h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* ===============================================
   Footer
   =============================================== */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: rgba(255,255,255,0.7);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    color: rgba(255,255,255,0.7);
}

/* ===============================================
   Auth Pages
   =============================================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 500px;
}

.auth-box {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    padding: 40px;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.auth-header p {
    color: var(--text-muted);
}

.auth-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(55, 136, 216, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-muted);
    font-size: 12px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.forgot-password {
    font-size: 14px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
}

.auth-footer p {
    margin-bottom: 10px;
    color: var(--text-muted);
}

/* ===============================================
   Alerts
   =============================================== */
.alert {
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert i {
    font-size: 18px;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* ===============================================
   Dashboard Layout
   =============================================== */
.dashboard {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: white;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 25px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 20px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-dark);
    transition: var(--transition);
    position: relative;
}

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

.nav-item.active {
    background-color: var(--primary-color);
    color: white;
}

.nav-item.active:hover {
    background-color: var(--primary-dark);
}

.nav-item i {
    font-size: 18px;
    width: 20px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.user-profile {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
}

.user-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    overflow: hidden;
}

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

.user-info h4 {
    font-size: 14px;
    margin-bottom: 5px;
}

.user-info a {
    font-size: 12px;
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 30px;
}

.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    font-size: 32px;
    margin-bottom: 5px;
}

.page-header p {
    color: var(--text-muted);
}

/* ===============================================
   Dashboard Cards
   =============================================== */
.welcome-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 60px 40px;
    text-align: center;
    box-shadow: var(--box-shadow);
}

.welcome-icon {
    width: 100px;
    height: 100px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    font-size: 40px;
}

.welcome-card h2 {
    font-size: 28px;
    margin-bottom: 15px;
}

.welcome-card p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.group-selector {
    background-color: white;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--box-shadow);
}

.group-selector select {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-info h3 {
    font-size: 28px;
    margin-bottom: 5px;
}

.stat-info p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.dashboard-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

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

.card-header h2 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 20px;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 20px;
}

/* Events List */
.events-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.event-item {
    display: flex;
    gap: 15px;
    padding: 15px;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
}

.event-date {
    width: 60px;
    text-align: center;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    padding: 10px;
}

.event-date .day {
    display: block;
    font-size: 24px;
    font-weight: bold;
}

.event-date .month {
    display: block;
    font-size: 12px;
    text-transform: uppercase;
}

.event-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.event-info p {
    font-size: 13px;
    color: var(--text-muted);
}

/* Lists Preview */
.lists-preview {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.list-item h4 {
    font-size: 15px;
    margin-bottom: 8px;
}

.list-progress span {
    font-size: 13px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 8px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-light);
    border-radius: 10px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background-color: var(--success-color);
    transition: var(--transition);
}

/* Members List */
.members-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.member-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.member-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    overflow: hidden;
}

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

.member-info {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.member-info h4 {
    font-size: 14px;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 500;
    border-radius: 12px;
    text-transform: uppercase;
}

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

.badge-secondary {
    background-color: var(--secondary-color);
    color: white;
}

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

/* ===============================================
   Responsive
   =============================================== */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar-header h2 span,
    .nav-item span,
    .user-info,
    .sidebar-footer .btn span {
        display: none;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 20px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .features-grid,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}