/* ==========================================
   MOBILE-RESPONSIVE CSS FRAMEWORK
   Mobile-first responsive design with sidebar navigation
   ========================================== */

/* ==========================================
   CSS VARIABLES & ROOT SETTINGS
   ========================================== */
:root {
    /* Colors */
    --primary-color: #2196F3;
    /* Brand blues (editable via Settings) */
    --brand-blue: #2a61cf;
    --brand-blue-deep: #1847af;
    --primary-dark: #1976D2;
    --secondary-color: #4CAF50;
    --accent-color: #FF9800;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --info-color: #2196F3;
    --success-color: #4CAF50;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #757575;
    --darker-gray: #424242;
    --black: #212121;
    
    /* Dark Theme Colors */
    --dark-bg: #121212;
    --dark-surface: #1e1e1e;
    --dark-surface-variant: #2d2d2d;
    --dark-text: #ffffff;
    --dark-text-secondary: #b3b3b3;
    
    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 60px;
    --header-height: 64px;
    --mobile-breakpoint: 768px;
    --tablet-breakpoint: 1024px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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-xxl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);
    --shadow-xl: 0 15px 35px rgba(0,0,0,0.15), 0 5px 15px rgba(0,0,0,0.07);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--black);
    background-color: var(--light-gray);
    overflow-x: hidden;
    transition: background-color var(--transition-normal);
}

/* ==========================================
   MOBILE-FIRST RESPONSIVE GRID SYSTEM
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--spacing-md));
}

.col {
    flex: 1;
    padding: 0 var(--spacing-md);
    min-width: 0;
}

/* Mobile-first column system */
.col-12 { width: 100%; }
.col-11 { width: 91.666667%; }
.col-10 { width: 83.333333%; }
.col-9 { width: 75%; }
.col-8 { width: 66.666667%; }
.col-7 { width: 58.333333%; }
.col-6 { width: 50%; }
.col-5 { width: 41.666667%; }
.col-4 { width: 33.333333%; }
.col-3 { width: 25%; }
.col-2 { width: 16.666667%; }
.col-1 { width: 8.333333%; }

/* Responsive breakpoints */
@media (min-width: 576px) {
    .col-sm-12 { width: 100%; }
    .col-sm-11 { width: 91.666667%; }
    .col-sm-10 { width: 83.333333%; }
    .col-sm-9 { width: 75%; }
    .col-sm-8 { width: 66.666667%; }
    .col-sm-7 { width: 58.333333%; }
    .col-sm-6 { width: 50%; }
    .col-sm-5 { width: 41.666667%; }
    .col-sm-4 { width: 33.333333%; }
    .col-sm-3 { width: 25%; }
    .col-sm-2 { width: 16.666667%; }
    .col-sm-1 { width: 8.333333%; }
}

@media (min-width: 768px) {
    .col-md-12 { width: 100%; }
    .col-md-11 { width: 91.666667%; }
    .col-md-10 { width: 83.333333%; }
    .col-md-9 { width: 75%; }
    .col-md-8 { width: 66.666667%; }
    .col-md-7 { width: 58.333333%; }
    .col-md-6 { width: 50%; }
    .col-md-5 { width: 41.666667%; }
    .col-md-4 { width: 33.333333%; }
    .col-md-3 { width: 25%; }
    .col-md-2 { width: 16.666667%; }
    .col-md-1 { width: 8.333333%; }
}

@media (min-width: 992px) {
    .col-lg-12 { width: 100%; }
    .col-lg-11 { width: 91.666667%; }
    .col-lg-10 { width: 83.333333%; }
    .col-lg-9 { width: 75%; }
    .col-lg-8 { width: 66.666667%; }
    .col-lg-7 { width: 58.333333%; }
    .col-lg-6 { width: 50%; }
    .col-lg-5 { width: 41.666667%; }
    .col-lg-4 { width: 33.333333%; }
    .col-lg-3 { width: 25%; }
    .col-lg-2 { width: 16.666667%; }
    .col-lg-1 { width: 8.333333%; }
}

@media (min-width: 1200px) {
    .col-xl-12 { width: 100%; }
    .col-xl-11 { width: 91.666667%; }
    .col-xl-10 { width: 83.333333%; }
    .col-xl-9 { width: 75%; }
    .col-xl-8 { width: 66.666667%; }
    .col-xl-7 { width: 58.333333%; }
    .col-xl-6 { width: 50%; }
    .col-xl-5 { width: 41.666667%; }
    .col-xl-4 { width: 33.333333%; }
    .col-xl-3 { width: 25%; }
    .col-xl-2 { width: 16.666667%; }
    .col-xl-1 { width: 8.333333%; }
}

/* ==========================================
   MOBILE-RESPONSIVE LAYOUT STRUCTURE
   ========================================== */
.app-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Header */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    transition: all var(--transition-normal);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    padding: var(--spacing-sm);
    cursor: pointer;
    color: var(--dark-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
    background: var(--light-gray);
    color: var(--primary-color);
}

/* Sidebar */
.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 999;
    overflow-y: auto;
    transition: transform var(--transition-normal);
    transform: translateX(0);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    border-bottom: 1px solid var(--medium-gray);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--black);
}

.sidebar-logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.sidebar-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--dark-gray);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-close:hover {
    background: var(--light-gray);
    color: var(--primary-color);
}

.sidebar-nav {
    padding: var(--spacing-lg) 0;
}

.nav-section {
    margin-bottom: var(--spacing-lg);
}

.nav-section-title {
    padding: 0 var(--spacing-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--black);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    gap: var(--spacing-md);
}

.nav-link:hover {
    background: var(--light-gray);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-color);
    color: var(--white);
    border-left-color: var(--primary-dark);
}

.nav-link i {
    font-size: var(--font-size-lg);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.nav-text {
    font-weight: 500;
    flex: 1;
}

.nav-badge {
    background: var(--danger-color);
    color: var(--white);
    border-radius: 12px;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    min-width: 20px;
    text-align: center;
}

/* Submenu */
.nav-submenu {
    background: rgba(0,0,0,0.03);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.nav-item.expanded .nav-submenu {
    max-height: 500px;
}

.nav-submenu .nav-link {
    padding-left: calc(var(--spacing-lg) + 20px + var(--spacing-md));
    font-size: var(--font-size-sm);
}

.submenu-toggle {
    padding: var(--spacing-xs);
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    transition: transform var(--transition-fast);
}

.nav-item.expanded .submenu-toggle {
    transform: rotate(180deg);
}

/* Main Content */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    padding: var(--spacing-lg);
    transition: margin-left var(--transition-normal);
}

/* Mobile Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ==========================================
   MOBILE-RESPONSIVE BREAKPOINTS
   ========================================== */

/* Mobile Devices (up to 768px) */
@media (max-width: 767.98px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .app-header {
        padding: 0 var(--spacing-md);
    }
    
    .app-sidebar {
        transform: translateX(-100%);
    }
    
    .app-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .sidebar-close {
        display: block;
    }
    
    .app-main {
        margin-left: 0;
        padding: var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .row {
        margin: 0 calc(-1 * var(--spacing-sm));
    }
    
    .col {
        padding: 0 var(--spacing-sm);
    }
    
    /* Mobile-specific adjustments */
    .sidebar-nav {
        padding-bottom: 80px; /* Extra space for mobile navigation */
    }
    
    .nav-link {
        padding: var(--spacing-lg) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
    
    .nav-link i {
        font-size: var(--font-size-xl);
    }
}

/* Tablet Devices (768px to 1023px) */
@media (min-width: 768px) and (max-width: 1023.98px) {
    .app-sidebar {
        width: 260px;
    }
    
    .app-main {
        margin-left: 260px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Desktop Devices (1024px and up) */
@media (min-width: 1024px) {
    .app-sidebar {
        width: var(--sidebar-width);
    }
    
    .app-main {
        margin-left: var(--sidebar-width);
    }
}

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .app-main {
        padding: var(--spacing-xl);
    }
}

/* ==========================================
   MOBILE-FRIENDLY COMPONENTS
   ========================================== */

/* Touch-friendly buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px; /* iOS recommended touch target */
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

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

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background: var(--medium-gray);
    color: var(--black);
    border-color: var(--medium-gray);
}

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

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

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

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

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--black);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--black);
    background: var(--white);
    border: 1px solid var(--medium-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    min-height: 44px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

/* Mobile cards */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--medium-gray);
    background: var(--light-gray);
}

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

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--medium-gray);
    background: var(--light-gray);
}

/* ==========================================
   DARK THEME SUPPORT
   ========================================== */
.dark-theme {
    --white: var(--dark-surface);
    --light-gray: var(--dark-bg);
    --medium-gray: var(--dark-surface-variant);
    --black: var(--dark-text);
    --dark-gray: var(--dark-text-secondary);
}

.dark-theme .app-header,
.dark-theme .app-sidebar {
    background: var(--dark-surface);
    color: var(--dark-text);
}

.dark-theme .sidebar-header {
    border-bottom-color: var(--dark-surface-variant);
}

.dark-theme .nav-link:hover {
    background: var(--dark-surface-variant);
}

.dark-theme .form-control {
    background: var(--dark-surface);
    border-color: var(--dark-surface-variant);
    color: var(--dark-text);
}

.dark-theme .card {
    background: var(--dark-surface);
}

/* ==========================================
   MOBILE ACCESSIBILITY & TOUCH IMPROVEMENTS
   ========================================== */
@media (hover: none) and (pointer: coarse) {
    /* Touch device specific styles */
    .btn {
        min-height: 48px; /* Larger touch targets on touch devices */
    }
    
    .nav-link {
        padding: var(--spacing-lg);
    }
    
    .form-control {
        min-height: 48px;
        padding: var(--spacing-lg);
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

/* Display utilities */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }

/* Mobile display utilities */
@media (max-width: 767.98px) {
    .d-mobile-none { display: none !important; }
    .d-mobile-block { display: block !important; }
    .d-mobile-flex { display: flex !important; }
}

/* Spacing utilities */
.m-0 { margin: 0 !important; }
.m-1 { margin: var(--spacing-xs) !important; }
.m-2 { margin: var(--spacing-sm) !important; }
.m-3 { margin: var(--spacing-md) !important; }
.m-4 { margin: var(--spacing-lg) !important; }
.m-5 { margin: var(--spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacing-xs) !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing-md) !important; }
.p-4 { padding: var(--spacing-lg) !important; }
.p-5 { padding: var(--spacing-xl) !important; }

/* Text utilities */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }

/* ==========================================
   ANIMATIONS & TRANSITIONS
   ========================================== */
@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

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

.slide-in-left {
    animation: slideInLeft var(--transition-normal);
}

.slide-in-right {
    animation: slideInRight var(--transition-normal);
}

.fade-in {
    animation: fadeIn var(--transition-normal);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================
   CONTRAST FIXES (Transactions Page)
   Ensures text is visible on dark and light themes
   ========================================== */
#transactions-page .card,
#transactions-page .card-header,
#transactions-page .card-body {
    background: var(--white);
    color: var(--black);
}

#transactions-page .card-header h2,
#transactions-page .card-header p,
#transactions-page .card-body h3,
#transactions-page .card-body h4,
#transactions-page .card-body p,
#transactions-page .card-body li {
    color: inherit;
}

.dark-theme #transactions-page .card,
.dark-theme #transactions-page .card-header,
.dark-theme #transactions-page .card-body {
    background: var(--dark-surface);
    color: var(--dark-text);
}

.dark-theme #transactions-page .card-body a.btn,
#transactions-page .card-body a.btn {
    color: #ffffff;
}

#transactions-page .card-body ul { margin-left: 1.25rem; }
#transactions-page .card-body ul li { list-style: disc; }

/* ==========================================
   GLOBAL LIGHT BLUE THEME (white text everywhere)
   ========================================== */
body {
    /* Theme-managed colors (Aurora/Carbon/NavyGold) */
    background: var(--bg-main);
    color: var(--text-primary);
}

[data-theme='legacy-blue'] .app-header, [data-theme='legacy-blue'] .header, [data-theme='legacy-blue'] .app-sidebar, [data-theme='legacy-blue'] .sidebar {
    background: color-mix(in srgb, var(--brand-blue-deep) 95%, #000 0%);
    color: #ffffff;
}

/* Sidebar text and links */
.sidebar .nav-link,
.sidebar .nav-section-title,
.sidebar .nav-link i { color: #ffffff; }

.sidebar .nav-link:hover {
    background: rgba(255,255,255,0.12);
    color: #ffffff;
    border-left-color: #ffffff;
}

.sidebar .nav-link.active {
    background: rgba(255,255,255,0.18);
    color: #ffffff;
    border-left-color: #ffffff;
}

/* Main content and cards */
.app-main, .page { background: transparent; }
.card, .card-header, .card-body { background: var(--bg-card); color: var(--text-primary); }

/* Typography */
.page h1, .page h2, .page h3, .page h4, .page h5, .page h6,
.page p, .page li, .page label, .page small, .page span,
.page a, .page th, .page td,
.card h1, .card h2, .card h3, .card h4, .card h5, .card h6,
.card p, .card li, .card small, .card label, .card a, .card th, .card td,
.card i { color: var(--text-primary); }

/* Forms */
.form-label { color: var(--text-primary); }
.form-control {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
}
.form-control::placeholder { color: var(--text-secondary); }
select.form-control option { color: #000; background: #fff; }

/* Buttons */
.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border);
}
.btn-secondary:hover { background: rgba(255,255,255,0.22); }

/* Tables */
.table, table { color: var(--text-primary); }
.table th, table th { color: var(--text-primary); background: var(--bg-hover); }
.table td, table td { color: var(--text-primary); }

/* Links */
a { color: var(--primary); }
a:hover { color: var(--primary-dark); }

/* Ensure transactions page follows theme (override earlier block) */
#transactions-page .card, #transactions-page .card-header, #transactions-page .card-body {
    background: var(--bg-card);
    color: var(--text-primary);
}