:root {
    --primary: #1A237E;
    --primary-light: #534BAE;
    --primary-dark: #000051;
    --accent: #03A9F4;
    --background: #F5F7FA;
    --surface: #FFFFFF;
    --error: #D32F2F;
    --success: #388E3C;
    --warning: #FBC02D;
    --gray: #757575;
    --gray-light: #E0E0E0;
    --text-main: #121212;
    --white: #FFFFFF;

    --radius-xl: 32px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 12px;

    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Layout */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px;
}

/* Header */
.dashboard-header {
    background: var(--surface);
    padding: 1.25rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
}

/* Main UI Components */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.02);
    cursor: pointer;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 16px;
    flex: 1;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
}

/* Navigation Menu (Android Style) */
.nav-item-card {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
}

.nav-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(26, 35, 126, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.25rem;
}

.nav-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2px;
}

.nav-info p {
    font-size: 0.85rem;
    color: var(--gray);
}

.nav-arrow {
    margin-left: auto;
    color: var(--gray-light);
    font-size: 0.9rem;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    border: none;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background: var(--primary-light);
    box-shadow: 0 4px 15px rgba(26, 35, 126, 0.2);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.8rem;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal {
    background: var(--surface);
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    animation: modalSlideUp 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes modalSlideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.modal-body .form-group {
    margin-bottom: 16px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 32px;
}

/* Form Inputs */
.input-field {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--gray-light);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(26, 35, 126, 0.05);
}

/* Tooltips/Toasts */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 40px;
    box-shadow: var(--shadow-lg);
    font-weight: 600;
    z-index: 2000;
}

/* Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-up {
    animation: slideUp 0.6s ease forwards;
}

/* Detail Overlay (Slide-up) */
.detail-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--surface);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: 32px;
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1100;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.1);
}

.detail-sheet.active {
    transform: translateY(0);
}

/* Responsive & Premium Enhancements */
@media (max-width: 600px) {
    .app-container {
        padding: 16px;
    }

    /* Header Mobile Layout */
    .header-content {
        flex-direction: row;
        gap: 12px;
    }

    .nav-links span {
        display: none;
        /* Hide email on mobile to save space */
    }

    .logo-section span {
        font-size: 1.1rem !important;
        /* Smaller logo text */
    }

    /* Stats Stack */
    .stats-bar {
        flex-direction: column;
        /* Stack stats on mobile */
        gap: 12px;
    }

    .modal {
        padding: 24px;
        border-radius: var(--radius-lg);
        margin: 16px;
        max-height: 90vh;
        /* Prevent overflow */
        overflow-y: auto;
    }

    /* Bigger tap targets */
    .nav-item-card {
        padding: 16px;
        min-height: 80px;
    }

    .fab {
        bottom: 24px;
        right: 24px;
        width: 56px;
        height: 56px;
        font-size: 20px;
    }
}

/* Premium Visuals */

.stat-card {
    background: linear-gradient(135deg, var(--surface) 0%, #F5F7FA 100%);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.4);
}