/* Habit Tracker - Modern Sleek Stylesheet with Full Persian & Multi-Theme Support */

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.25);
    --bg-main: #0b0f19;
    --bg-card: rgba(19, 26, 43, 0.75);
    --bg-card-hover: rgba(28, 38, 63, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --warning: #f59e0b;
    --danger: #ef4444;
    --font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Theme Variations */
body.theme-light {
    --bg-main: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
}

body.theme-neon {
    --primary-color: #06b6d4;
    --primary-hover: #0891b2;
    --primary-glow: rgba(6, 182, 212, 0.4);
    --bg-main: #05050f;
    --bg-card: rgba(16, 18, 38, 0.8);
    --border-color: rgba(6, 182, 212, 0.2);
    --text-primary: #f0fdf4;
}

body.theme-emerald {
    --primary-color: #10b981;
    --primary-hover: #059669;
    --primary-glow: rgba(16, 185, 129, 0.3);
    --bg-main: #061814;
    --bg-card: rgba(8, 34, 27, 0.75);
    --border-color: rgba(16, 185, 129, 0.15);
}

body.theme-sunset {
    --primary-color: #f43f5e;
    --primary-hover: #e11d48;
    --primary-glow: rgba(244, 63, 94, 0.3);
    --bg-main: #14080e;
    --bg-card: rgba(35, 15, 24, 0.8);
    --border-color: rgba(244, 63, 94, 0.15);
}

/* Font Variations */
body.font-vazirmatn { font-family: 'Vazirmatn', sans-serif !important; }
body.font-shabnam { font-family: 'Shabnam', sans-serif !important; }
body.font-sahel { font-family: 'Sahel', sans-serif !important; }
body.font-samim { font-family: 'Samim', sans-serif !important; }
body.font-system { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif !important; }

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

body {
    direction: rtl;
    text-align: right;
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Ambient Background Glow */
body::before {
    content: '';
    position: fixed;
    top: -200px;
    right: -100px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
    opacity: 0.5;
}

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

/* Header & Navigation */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 28px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
}

.brand-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), #ec4899);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: var(--primary-color);
    background: var(--primary-glow);
    font-weight: 700;
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

/* Layout */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 24px 20px;
}

/* Date Ribbon / Bar */
.date-ribbon {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    margin-bottom: 24px;
    backdrop-filter: blur(12px);
}

.date-info h2 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 4px;
}

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

.date-nav {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-hover);
}

/* Grid & Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 12px;
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 6px;
}

.stat-sub {
    font-size: 12px;
    color: var(--text-muted);
}

/* Section Header */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 28px 0 16px;
}

.section-title {
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

/* Habit List & Items */
.habits-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.habit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

.habit-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.habit-card.completed {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.06);
}

.habit-main {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
}

.habit-check-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: transparent;
    font-size: 20px;
    flex-shrink: 0;
}

.habit-check-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-glow);
}

.habit-card.completed .habit-check-btn {
    background: var(--success);
    border-color: var(--success);
    color: #fff;
    box-shadow: 0 4px 14px var(--success-glow);
}

.habit-details h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.habit-details p {
    font-size: 13px;
    color: var(--text-secondary);
}

.habit-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 6px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}

.streak-badge {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.habit-numeric-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.num-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
}

.num-btn:hover {
    background: rgba(255, 255, 255, 0.12);
}

.num-display {
    font-size: 14px;
    font-weight: 700;
    min-width: 48px;
    text-align: center;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    backdrop-filter: blur(12px);
}

.chart-card h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* GitHub Heatmap Grid */
.heatmap-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
    overflow-x: auto;
}

.heatmap-grid {
    display: grid;
    grid-template-rows: repeat(7, 14px);
    grid-auto-flow: column;
    grid-auto-columns: 14px;
    gap: 4px;
    direction: ltr; /* Chronological order left to right */
}

.heatmap-cell {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: transform 0.15s ease;
    position: relative;
}

.heatmap-cell:hover {
    transform: scale(1.3);
    z-index: 5;
}

.heatmap-cell.level-0 { background: rgba(255, 255, 255, 0.04); }
.heatmap-cell.level-1 { background: rgba(16, 185, 129, 0.3); }
.heatmap-cell.level-2 { background: rgba(16, 185, 129, 0.55); }
.heatmap-cell.level-3 { background: rgba(16, 185, 129, 0.8); }
.heatmap-cell.level-4 { background: #10b981; box-shadow: 0 0 6px var(--success-glow); }

/* Forms & Inputs */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-backdrop.open {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 520px;
    padding: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    animation: modalPop 0.25s ease-out;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

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

.modal-title {
    font-size: 18px;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

/* Mobile Bottom Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    padding: 8px 16px;
    z-index: 99;
    justify-content: space-around;
}

@media (max-width: 768px) {
    .mobile-nav {
        display: flex;
    }
    .navbar .nav-links {
        display: none;
    }
    body {
        padding-bottom: 70px;
    }
}