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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 16px;
}

.btn-full {
    width: 100%;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    margin: 20px 0;
    padding: 20px 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.logo {
    font-size: 28px;
    font-weight: 700;
    margin-left: 10px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    gap: 12px;
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    color: white;
    padding: 40px 0;
}

.hero h2 {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.hero p {
    font-size: 22px;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 80px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.feature {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 56px;
    margin-bottom: 24px;
}

.feature h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature p {
    opacity: 0.9;
    font-size: 16px;
    line-height: 1.6;
}

/* Dashboard Section */
.dashboard-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 40px;
    margin: 20px 0;
    color: #333;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.user-welcome {
    text-align: center;
    margin-bottom: 40px;
}

.user-welcome h2 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #1f2937;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: #6b7280;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Challenge Card */
.challenge-card {
    background: white;
    border-radius: 20px;
    padding: 32px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    margin-bottom: 32px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.challenge-header h3 {
    font-size: 22px;
    font-weight: 600;
    color: #1f2937;
}

.challenge-date {
    font-size: 14px;
    color: #6b7280;
    font-weight: 500;
}

.challenge-content {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
}

.challenge-icon {
    font-size: 56px;
    width: 96px;
    height: 96px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.challenge-text h4 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #1f2937;
}

.challenge-text p {
    color: #6b7280;
    font-size: 16px;
    line-height: 1.6;
}

.challenge-actions {
    display: flex;
    gap: 16px;
}

.challenge-status {
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    border-radius: 12px;
    border-left: 4px solid #10b981;
}

.status-complete {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #065f46;
    font-weight: 500;
}

.status-icon {
    font-size: 20px;
}

.dashboard-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Progress Section */
.progress-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 40px;
    margin: 20px 0;
    color: #333;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.progress-header h2 {
    font-size: 32px;
    font-weight: 600;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.progress-card {
    background: white;
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.progress-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #1f2937;
}

.week-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.day-cell {
    aspect-ratio: 1;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 500;
    background: #f9fafb;
    color: #6b7280;
    transition: all 0.3s ease;
}

.day-cell.completed {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    transform: scale(1.1);
}

.day-cell.today {
    border: 2px solid #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.recent-challenges {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.recent-challenge {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: #f9fafb;
    border-radius: 12px;
    transition: background 0.3s ease;
}

.recent-challenge:hover {
    background: #f3f4f6;
}

.recent-challenge-icon {
    font-size: 24px;
}

.recent-challenge-text {
    flex: 1;
}

.recent-challenge-title {
    font-weight: 500;
    color: #1f2937;
    font-size: 14px;
    margin-bottom: 4px;
}

.recent-challenge-date {
    font-size: 12px;
    color: #6b7280;
}

.recent-challenge-status {
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: 500;
}

.recent-challenge-status.completed {
    background: #ecfdf5;
    color: #065f46;
}

.recent-challenge-status.skipped {
    background: #fef3c7;
    color: #92400e;
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.footer-creator {
    margin-top: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.footer-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: white;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .hero h2 {
        font-size: 40px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .user-stats {
        gap: 40px;
    }
    
    .challenge-content {
        flex-direction: column;
        text-align: center;
    }
    
    .challenge-actions {
        flex-direction: column;
    }
    
    .dashboard-actions {
        flex-direction: column;
    }
    
    .progress-header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .progress-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .dashboard-section,
    .progress-section {
        padding: 24px;
        margin: 16px 0;
    }
    
    .challenge-card {
        padding: 24px;
    }
    
    .hero h2 {
        font-size: 32px;
    }
    
    .user-welcome h2 {
        font-size: 28px;
    }
    
    .user-stats {
        gap: 24px;
    }
    
    .stat-number {
        font-size: 32px;
    }
}