/* PiTax - Modern CSS Framework */
/* Mobile-first, responsive design with dark mode support */

/* ============================================
   CSS VARIABLES & THEME SYSTEM
   ============================================ */
:root {
    /* Primary Colors - Nigerian Green & White theme with modern accents */
    --primary-color: #008751;
    --primary-dark: #006B3F;
    --primary-light: #00A862;
    --secondary-color: #2C3E50;
    --accent-color: #3498DB;
    --accent-hover: #2980B9;

    /* Semantic Colors */
    --success-color: #27AE60;
    --warning-color: #F39C12;
    --error-color: #E74C3C;
    --info-color: #3498DB;

    /* Neutral Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #E9ECEF;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --text-muted: #95A5A6;
    --border-color: #DEE2E6;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Mobile WebView Optimization */
    --touch-target: 48px;
    --nav-bottom-height: calc(110px + env(safe-area-inset-bottom, 0px));
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-primary: #1A1A2E;
    --bg-secondary: #16213E;
    --bg-tertiary: #0F3460;
    --text-primary: #EAEAEA;
    --text-secondary: #B8B8B8;
    --text-muted: #8E8E8E;
    --border-color: #2C3E50;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

h5 {
    font-size: var(--font-size-base);
}

h6 {
    font-size: var(--font-size-sm);
}

p {
    margin-bottom: var(--spacing-md);
}

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

a:hover {
    color: var(--accent-hover);
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-sm {
    max-width: 600px;
}

.container-lg {
    max-width: 1400px;
}

/* ============================================
   CARDS & CONTAINERS
   ============================================ */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.glass-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.05);
    transition: all var(--transition-base);
}

.glass-card:hover {
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
}

.card-header {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

/* Utilities */
.font-weight-800 { font-weight: 800; }
.font-weight-700 { font-weight: 700; }
.shadow-premium { box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1) !important; }

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237F8C8D' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

.form-check-label {
    cursor: pointer;
    user-select: none;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

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

.btn-secondary:hover {
    background: #34495E;
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

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

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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

.alert-success {
    background: #D4EDDA;
    color: #155724;
    border-left-color: var(--success-color);
}

.alert-error {
    background: #F8D7DA;
    color: #721C24;
    border-left-color: var(--error-color);
}

.alert-warning {
    background: #FFF3CD;
    color: #856404;
    border-left-color: var(--warning-color);
}

.alert-info {
    background: #D1ECF1;
    color: #0C5460;
    border-left-color: var(--info-color);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.navbar-brand {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.navbar-link {
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.navbar-link:hover {
    color: var(--primary-color);
}

/* ============================================
   DARK MODE TOGGLE
   ============================================ */
.theme-toggle {
    background: var(--bg-tertiary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: var(--font-size-lg);
    transition: transform var(--transition-fast);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
    text-align: center;
}

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

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

.text-primary {
    color: var(--primary-color);
}

.text-success {
    color: var(--success-color);
}

.text-error {
    color: var(--error-color);
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.d-none {
    display: none;
}

.d-block {
    display: block;
}

.d-flex {
    display: flex;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    .navbar {
        display: none;
        /* Hide top nav on mobile, use bottom nav instead */
    }

    body {
        padding-bottom: var(--nav-bottom-height);
        /* Space for bottom nav */
    }

    .card {
        padding: var(--spacing-md);
    }

    .btn,
    .form-control,
    select.form-control {
        min-height: var(--touch-target);
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ============================================
   MOBILE BOTTOM NAVIGATION
   ============================================ */
.mobile-nav {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: var(--nav-bottom-height) !important;
    background: var(--bg-primary) !important;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.3) !important;
    display: none;
    /* Controlled by media query below */
    grid-template-columns: repeat(5, 1fr) !important;
    grid-template-rows: repeat(2, 1fr) !important;
    z-index: 999998 !important;
    border-top: 2px solid var(--primary-color) !important;
    padding: 5px 0 calc(5px + env(safe-area-inset-bottom, 0px)) 0 !important;
    overflow: visible !important;
}

@media (max-width: 768px) {
    .mobile-nav {
        display: grid;
    }
}

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

.mobile-nav-item {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    color: var(--text-primary) !important;
    /* Back to neutral but strong */
    text-decoration: none !important;
    font-size: 0.72rem !important;
    /* Slightly smaller */
    font-weight: 600 !important;
    gap: 1px !important;
    transition: all var(--transition-fast) !important;
    padding: 2px !important;
    height: 100% !important;
    text-align: center !important;
    border: none !important;
    background: transparent !important;
    position: relative !important;
    z-index: 999999 !important;
}

.mobile-nav-item span {
    display: block !important;
    font-weight: 600 !important;
    font-size: 0.68rem !important;
    line-height: 1.1 !important;
    width: 60px !important;
    white-space: normal !important;
    overflow: visible !important;
    text-transform: capitalize !important;
}

.mobile-nav-item i {
    font-size: 1.25rem !important;
    /* Slightly smaller icons */
    margin-bottom: 2px !important;
    display: block !important;
}

.mobile-nav-item.theme-toggle-mobile {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}


/* ============================================
   AUTH PAGES SPECIFIC
   ============================================ */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #001B10 0%, #71b280 100%);
}

.auth-card {
    width: 100%;
    max-width: 450px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
}

.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo h1 {
    color: var(--primary-color);
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xs);
}

.auth-logo p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}