/* Sprintura Font System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Minimalistic White/Grey Theme */
:root {
    /* Base Colors - White/Grey Theme */
    --color-background: #F8F9FA; /* Very light grey background */
    --color-white: #FFFFFF;
    --color-card: #FFFFFF; /* Pure white for cards */
    
    /* Text Colors - Dark Grey Hierarchy */
    --text-primary: #2C3E50; /* Dark grey for main text */
    --text-secondary: #6C757D; /* Lighter grey for secondary text */
    --text-muted: #ADB5BD; /* Muted grey for less important text */
    
    /* Accent Colors - Dark Grey Theme */
    --color-accent: #495057; /* Dark grey for buttons and accents */
    --color-accent-light: #6C757D; /* Lighter grey for hover states */
    --color-accent-dark: #343A40; /* Darker grey for active states */
    
    /* Border Colors */
    --border-light: #E9ECEF; /* Subtle light borders */
    --border-medium: #DEE2E6; /* Medium borders */
    --border-dark: #CED4DA; /* Darker borders for emphasis */
    
    /* Shadow System */
    --shadow-subtle: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.15);
    
    /* Typography - Sprintura System */
    --font-family: 'Sprintura', 'Inter', Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    
    /* Clean Transitions */
    --transition-smooth: all 0.2s ease;
    --transition-bounce: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Body & Base Styles */
body {
    font-family: var(--font-family);
    background: var(--color-background);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

/* Clean Card Component */
.clean-card {
    background: var(--color-card);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
}

.clean-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

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

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    padding: 1rem 2rem;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Minimalistic Dotted Banner */
.reconnect-banner {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.dotted-text {
    font-family: monospace;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 2px;
    color: var(--color-accent);
}

.dot {
    display: inline-block;
    width: 5px;
    height: 5px;
    background-color: var(--color-accent);
    border-radius: 50%;
    margin: 1px;
}

.letter {
    display: inline-block;
    margin: 0 2px;
}

/* Clean Navigation */
.nav-tabs {
    display: flex;
    background: var(--color-white);
    border-radius: 8px;
    padding: 4px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-subtle);
}

.nav-tab {
    padding: 10px 18px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: var(--font-family);
}

.nav-tab.active {
    background: var(--color-accent);
    color: white;
    box-shadow: var(--shadow-medium);
}

.nav-tab:hover:not(.active) {
    background: var(--color-background);
    color: var(--text-primary);
}

/* User Profile */
.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-stats {
    text-align: right;
}

.user-level {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    font-weight: 600;
    font-family: var(--font-family);
}

.user-xp {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-family: var(--font-family);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 20px;
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-family: var(--font-family);
    font-size: 14px;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-medium);
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.stat-card {
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition-bounce);
    border-radius: 8px;
}

.stat-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-medium);
}

.stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent-dark);
    line-height: 1;
    margin-bottom: 0.5rem;
    font-family: var(--font-family);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-weight: 500;
}

/* Section Headers */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-family);
}

/* Clean Buttons */
.btn {
    padding: 12px 20px;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: var(--font-family);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

.btn-secondary:hover {
    background: var(--color-background);
    border-color: var(--border-dark);
    transform: translateY(-1px);
}

/* Task List */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem;
    background: var(--color-white);
    border-radius: 8px;
    border: 1px solid var(--border-light);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-subtle);
}

.task-item:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-medium);
    transform: translateX(4px);
}

.task-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-dark);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: var(--transition-smooth);
    background: var(--color-white);
}

.task-checkbox.checked {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.task-checkbox.checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: 700;
    font-size: 14px;
}

.task-content {
    flex: 1;
}

.task-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    font-family: var(--font-family);
}

.task-meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-family: var(--font-family);
}

.task-xp {
    background: var(--color-background);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-accent-dark);
    border: 1px solid var(--border-light);
    font-family: var(--font-family);
}

/* Progress Bars */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-background);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 1rem;
    border: 1px solid var(--border-light);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    border-radius: 4px;
    transition: width 0.8s ease;
}

/* Habit Cards */
.habit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.habit-card {
    padding: 1.5rem;
}

.habit-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.habit-icon {
    width: 48px;
    height: 48px;
    border-radius: 24px;
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-subtle);
}

.habit-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    font-family: var(--font-family);
}

.habit-streak {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    font-family: var(--font-family);
}

/* Rewards Grid */
.rewards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.reward-card {
    text-align: center;
    padding: 1.5rem 1rem;
    cursor: pointer;
    transition: var(--transition-bounce);
}

.reward-card:hover {
    transform: scale(1.02) translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.reward-icon {
    font-size: 16px;
    margin-bottom: 0.75rem;
    color: var(--color-accent);
    font-weight: 600;
}

.reward-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-family: var(--font-family);
}

.reward-cost {
    background: var(--color-accent);
    color: white;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: inline-block;
    font-family: var(--font-family);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--color-white);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    padding: 2rem;
    max-width: 480px;
    width: 90%;
    animation: scaleIn 0.2s ease;
    box-shadow: var(--shadow-strong);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* Clean Form Styles */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-family: var(--font-family);
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    background: var(--color-white);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: var(--transition-smooth);
}

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

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(73, 80, 87, 0.1);
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Clean Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--color-white);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    z-index: 1001;
    animation: slideIn 0.2s ease;
    box-shadow: var(--shadow-medium);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.notification.success {
    border-left: 4px solid var(--color-accent);
}

.notification.error {
    border-left: 4px solid #dc3545;
}

/* Utility Classes */
.activity-text {
    color: var(--text-primary);
    font-family: var(--font-family);
}

.empty-state {
    color: var(--text-secondary);
    font-family: var(--font-family);
}

.credits-display {
    color: var(--color-accent-dark);
    font-family: var(--font-family);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .nav-tabs {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .dotted-text {
        font-size: 14px;
    }
}

/* Focus Styles */
.btn:focus, .nav-tab:focus, .task-checkbox:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Clean spacing */
.content-spacing {
    padding: 1.5rem;
}