/* CampusNotes Hub - Unified Responsive Framework */
/* Mobile-First Approach with Touch-Friendly Design */

:root {
    --oily-green: #2d5016;
    --oily-golden: #b8860b;
    --light-bg: #fafafa;
    --dark-text: #1a1a1a;
    --success-green: #28a745;
    --danger-red: #dc3545;
    --warning-orange: #fd7e14;
    --info-blue: #17a2b8;
    
    /* Responsive Breakpoints */
    --mobile-xs: 320px;
    --mobile-sm: 480px;
    --tablet: 768px;
    --tablet-lg: 1024px;
    --desktop: 1200px;
    --desktop-lg: 1400px;
    
    /* Touch-Friendly Sizing */
    --touch-target-min: 44px;
    --mobile-font-base: 16px;
    --mobile-font-small: 14px;
    --desktop-font-base: 15px;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
}

/* Base Mobile Styles (320px+) */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-size: var(--mobile-font-base);
    line-height: 1.6;
    font-family: 'Inter', sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* Typography Responsive Scale */
h1 { 
    font-size: 1.75rem; 
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}
h2 { 
    font-size: 1.5rem; 
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-md);
}
h3 { 
    font-size: 1.25rem; 
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}
h4 { 
    font-size: 1.125rem; 
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
}
h5 { 
    font-size: 1rem; 
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
}
h6 { 
    font-size: 0.875rem; 
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

/* Tablet Typography */
@media (min-width: 768px) {
    body { font-size: var(--desktop-font-base); }
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    h5 { font-size: 1.125rem; }
    h6 { font-size: 1rem; }
}

/* Desktop Typography */
@media (min-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    h4 { font-size: 1.5rem; }
    h5 { font-size: 1.25rem; }
    h6 { font-size: 1rem; }
}

/* Responsive Navigation */
.navbar-responsive {
    background-color: var(--oily-green);
    padding: var(--space-sm) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1030;
    width: 100%;
}

.navbar-brand-responsive {
    color: #fff !important;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    padding: var(--space-xs) 0;
}

.navbar-brand-responsive:hover {
    color: var(--oily-golden) !important;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-main {
    font-size: 1rem;
    font-weight: 700;
}

.brand-sub {
    font-size: 0.65rem;
    opacity: 0.9;
    font-weight: 400;
}

.navbar-toggler {
    border: none;
    padding: var(--space-xs);
    background: transparent;
    color: #fff;
    font-size: 1.2rem;
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 2px var(--oily-golden);
    outline: none;
}

.navbar-nav {
    gap: var(--space-xs);
}

.navbar-nav .nav-link {
    color: rgba(255,255,255,0.9) !important;
    padding: var(--space-sm) var(--space-md) !important;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    font-weight: 500;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
    color: var(--oily-golden) !important;
    background: rgba(255,255,255,0.1);
    transform: translateY(-1px);
}

.navbar-nav .nav-link.active {
    color: var(--oily-golden) !important;
    background: rgba(255,255,255,0.15);
}

/* Mobile Navigation */
@media (max-width: 767px) {
    .navbar-collapse {
        background: var(--oily-green);
        margin-top: var(--space-sm);
        padding: var(--space-md);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-lg);
    }
    
    .navbar-nav {
        gap: var(--space-xs);
    }
    
    .navbar-nav .nav-link {
        padding: var(--space-md) !important;
        border-radius: var(--radius-md);
        margin-bottom: var(--space-xs);
    }
}

/* Tablet Navigation */
@media (min-width: 768px) {
    .navbar-brand-responsive {
        font-size: 1.3rem;
        gap: 8px;
    }
    
    .brand-main {
        font-size: 1.2rem;
    }
    
    .brand-sub {
        font-size: 0.7rem;
    }
}

/* Desktop Navigation */
@media (min-width: 1024px) {
    .navbar-brand-responsive {
        font-size: 1.5rem;
        gap: 10px;
    }
    
    .brand-main {
        font-size: 1.3rem;
    }
    
    .brand-sub {
        font-size: 0.75rem;
    }
}

/* Mobile-First Button System */
.btn-responsive {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--mobile-font-base);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-weight: 500;
    text-decoration: none;
    line-height: 1.4;
    position: relative;
    overflow: hidden;
}

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

.btn-responsive:active {
    transform: translateY(0);
}

.btn-responsive:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.3);
}

.btn-primary-responsive {
    background: var(--oily-green);
    color: #fff;
}

.btn-primary-responsive:hover {
    background: #1e3509;
    color: #fff;
}

.btn-secondary-responsive {
    background: var(--oily-golden);
    color: #fff;
}

.btn-secondary-responsive:hover {
    background: #9a7209;
    color: #fff;
}

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

.btn-outline-responsive:hover {
    background: var(--oily-green);
    color: #fff;
}

.btn-success-responsive {
    background: var(--success-green);
    color: #fff;
}

.btn-success-responsive:hover {
    background: #1e7e34;
}

.btn-danger-responsive {
    background: var(--danger-red);
    color: #fff;
}

.btn-danger-responsive:hover {
    background: #c82333;
}

.btn-sm-responsive {
    min-height: 36px;
    padding: var(--space-xs) var(--space-md);
    font-size: var(--mobile-font-small);
}

.btn-lg-responsive {
    min-height: 52px;
    padding: var(--space-md) var(--space-xl);
    font-size: 1.1rem;
}

/* Button Groups */
.btn-group-responsive {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
}

@media (max-width: 767px) {
    .btn-group-responsive {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-group-responsive .btn-responsive {
        width: 100%;
        justify-content: center;
    }
}

/* Tablet Buttons */
@media (min-width: 768px) {
    .btn-responsive {
        font-size: var(--desktop-font-base);
        padding: var(--space-sm) var(--space-xl);
    }
    
    .btn-sm-responsive {
        padding: var(--space-xs) var(--space-lg);
    }
    
    .btn-lg-responsive {
        padding: var(--space-lg) var(--space-xxl);
        font-size: 1.2rem;
    }
}
    justify-content: center;
    text-decoration: none;
    font-weight: 500;
}

.btn-primary-responsive {
    background: linear-gradient(135deg, var(--oily-green), #1a3a0d);
    color: #fff;
}

.btn-primary-responsive:hover {
    background: linear-gradient(135deg, #1a3a0d, var(--oily-green));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(45, 80, 22, 0.3);
}

.btn-secondary-responsive {
    background: linear-gradient(135deg, var(--oily-golden), #9a7209);
    color: #fff;
}

.btn-secondary-responsive:hover {
    background: linear-gradient(135deg, #9a7209, var(--oily-golden));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(184, 134, 11, 0.3);
}

/* Button Groups */
.btn-group-responsive {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin: var(--space-sm) 0;
}

@media (min-width: 768px) {
    .btn-group-responsive {
        gap: var(--space-sm);
    }
}

/* Responsive Form System */
.form-responsive {
    width: 100%;
    max-width: 100%;
}

.form-group-responsive {
    margin-bottom: var(--space-md);
}

.form-label-responsive {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--dark-text);
    font-size: var(--mobile-font-small);
}

@media (min-width: 768px) {
    .form-label-responsive {
        font-size: var(--desktop-font-base);
    }
}

.form-control-responsive {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--mobile-font-base);
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    background: #fff;
    transition: all 0.3s ease;
    min-height: var(--touch-target-min);
}

.form-control-responsive:focus {
    outline: none;
    border-color: var(--oily-green);
    box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.1);
}

/* Responsive Card System */
.card-responsive {
    background: #fff;
    border-radius: 12px;
    padding: var(--space-md);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin-bottom: var(--space-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-responsive:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

@media (min-width: 768px) {
    .card-responsive {
        padding: var(--space-lg);
    }
}

/* Responsive Grid System */
.grid-responsive {
    display: grid;
    gap: var(--space-md);
    width: 100%;
}

/* Mobile: 1 column */
.grid-responsive-1 { grid-template-columns: 1fr; }
.grid-responsive-2 { grid-template-columns: 1fr; }
.grid-responsive-3 { grid-template-columns: 1fr; }
.grid-responsive-4 { grid-template-columns: 1fr; }

/* Tablet: 2 columns */
@media (min-width: 768px) {
    .grid-responsive-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-responsive-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-responsive-4 { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop: Full columns */
@media (min-width: 1024px) {
    .grid-responsive-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-responsive-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Auto-fit Grid for Cards */
.grid-auto-responsive {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .grid-auto-responsive {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}

/* Responsive Table System */
.table-responsive-custom {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.table-responsive-custom table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
    background: #fff;
}

.table-responsive-custom th,
.table-responsive-custom td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
    font-size: var(--mobile-font-small);
}

@media (min-width: 768px) {
    .table-responsive-custom th,
    .table-responsive-custom td {
        font-size: var(--desktop-font-base);
        padding: 16px 20px;
    }
}

.table-responsive-custom th {
    background: var(--light-bg);
    font-weight: 600;
    color: var(--oily-green);
}

/* Mobile Table Cards Alternative */
@media (max-width: 767px) {
    .table-card-mobile {
        display: none;
    }
    
    .table-card-mobile.active {
        display: block;
    }
    
    .table-responsive-custom {
        display: none;
    }
    
    .table-responsive-custom.show-table {
        display: block;
    }
}

.table-card-item {
    background: #fff;
    border-radius: 8px;
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.table-card-item .card-label {
    font-weight: 600;
    color: var(--oily-green);
    font-size: var(--mobile-font-small);
    margin-bottom: 4px;
}

.table-card-item .card-value {
    font-size: var(--mobile-font-base);
    margin-bottom: var(--space-sm);
}

/* Responsive Modal System */
.modal-responsive .modal-dialog {
    margin: var(--space-sm);
    max-width: calc(100vw - 2rem);
}

@media (min-width: 768px) {
    .modal-responsive .modal-dialog {
        margin: 1.75rem auto;
        max-width: 500px;
    }
}

@media (min-width: 1024px) {
    .modal-responsive .modal-dialog {
        max-width: 600px;
    }
}

.modal-responsive .modal-content {
    border-radius: 12px;
    border: none;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.modal-responsive .modal-header {
    padding: var(--space-md);
    border-bottom: 1px solid #e0e0e0;
}

.modal-responsive .modal-body {
    padding: var(--space-md);
}

.modal-responsive .modal-footer {
    padding: var(--space-md);
    border-top: 1px solid #e0e0e0;
}

/* Responsive Sidebar System */
.sidebar-responsive {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: var(--oily-green);
    transition: left 0.3s ease;
    z-index: 1040;
    overflow-y: auto;
}

.sidebar-responsive.active {
    left: 0;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    z-index: 1035;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

@media (min-width: 1024px) {
    .sidebar-responsive {
        position: static;
        left: 0;
        width: 250px;
        height: calc(100vh - 60px);
    }
    
    .sidebar-overlay {
        display: none;
    }
}

/* Responsive Stats Cards */
.stats-grid-responsive {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

@media (min-width: 480px) {
    .stats-grid-responsive {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .stats-grid-responsive {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card-responsive {
    background: #fff;
    padding: var(--space-md);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card-responsive:hover {
    transform: translateY(-4px);
}

.stat-icon-responsive {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-sm);
    font-size: 1.5rem;
    color: #fff;
}

.stat-number-responsive {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--oily-green);
    margin-bottom: var(--space-xs);
}

.stat-label-responsive {
    font-size: var(--mobile-font-small);
    color: #666;
    font-weight: 500;
}

/* Responsive Utilities */
.hide-mobile {
    display: none;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: block;
    }
}

.show-mobile {
    display: block;
}

@media (min-width: 768px) {
    .show-mobile {
        display: none;
    }
}

.text-center-mobile {
    text-align: center;
}

@media (min-width: 768px) {
    .text-center-mobile {
        text-align: left;
    }
}

/* Responsive Spacing */
.p-responsive { padding: var(--space-sm); }
.px-responsive { padding-left: var(--space-sm); padding-right: var(--space-sm); }
.py-responsive { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.m-responsive { margin: var(--space-sm); }
.mx-responsive { margin-left: var(--space-sm); margin-right: var(--space-sm); }
.my-responsive { margin-top: var(--space-sm); margin-bottom: var(--space-sm); }

@media (min-width: 768px) {
    .p-responsive { padding: var(--space-md); }
    .px-responsive { padding-left: var(--space-md); padding-right: var(--space-md); }
    .py-responsive { padding-top: var(--space-md); padding-bottom: var(--space-md); }
    .m-responsive { margin: var(--space-md); }
    .mx-responsive { margin-left: var(--space-md); margin-right: var(--space-md); }
    .my-responsive { margin-top: var(--space-md); margin-bottom: var(--space-md); }
}

/* Loading States */
.loading-responsive {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    color: var(--oily-green);
}

.spinner-responsive {
    width: 40px;
    height: 40px;
    border: 3px solid #e0e0e0;
    border-top: 3px solid var(--oily-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Alerts */
.alert-responsive {
    padding: var(--space-md);
    border-radius: 8px;
    margin-bottom: var(--space-md);
    border: 1px solid transparent;
}

.alert-success-responsive {
    background: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-error-responsive {
    background: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.alert-warning-responsive {
    background: #fff3cd;
    border-color: #ffeaa7;
    color: #856404;
}

/* Print Styles */
@media print {
    .sidebar-responsive,
    .navbar-responsive,
    .btn-responsive,
    .hide-print {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .card-responsive {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* Responsive Form System */
.form-responsive {
    width: 100%;
}

.form-group-responsive {
    margin-bottom: var(--space-lg);
}

.form-label-responsive {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--dark-text);
    font-size: var(--mobile-font-small);
}

.form-control-responsive {
    width: 100%;
    min-height: var(--touch-target-min);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--mobile-font-base);
    border: 2px solid #e1e5e9;
    border-radius: var(--radius-md);
    background: #fff;
    color: var(--dark-text);
    transition: all 0.3s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-control-responsive:focus {
    outline: none;
    border-color: var(--oily-green);
    box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.1);
    transform: translateY(-1px);
}

.form-control-responsive::placeholder {
    color: #6c757d;
    opacity: 0.7;
}

.form-select-responsive {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--space-sm) center;
    background-size: 16px 12px;
    padding-right: calc(var(--space-xl) + 16px);
}

.form-check-responsive {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.form-check-input-responsive {
    width: 20px;
    height: 20px;
    border: 2px solid #dee2e6;
    border-radius: var(--radius-sm);
    background: #fff;
    cursor: pointer;
}

.form-check-input-responsive:checked {
    background: var(--oily-green);
    border-color: var(--oily-green);
}

.form-check-label-responsive {
    font-size: var(--mobile-font-small);
    cursor: pointer;
    line-height: 1.4;
}

/* Tablet Forms */
@media (min-width: 768px) {
    .form-label-responsive {
        font-size: var(--desktop-font-base);
    }
    
    .form-control-responsive {
        font-size: var(--desktop-font-base);
        padding: var(--space-md) var(--space-lg);
    }
    
    .form-check-label-responsive {
        font-size: var(--desktop-font-base);
    }
}

/* Responsive Card System */
.card-responsive {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

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

.card-header-responsive {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid #e9ecef;
}

.card-title-responsive {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: var(--space-xs);
}

.card-subtitle-responsive {
    font-size: var(--mobile-font-small);
    color: #6c757d;
    margin-bottom: 0;
}

.card-body-responsive {
    flex: 1;
}

.card-footer-responsive {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Tablet Cards */
@media (min-width: 768px) {
    .card-responsive {
        padding: var(--space-xl);
    }
    
    .card-title-responsive {
        font-size: 1.5rem;
    }
    
    .card-subtitle-responsive {
        font-size: var(--desktop-font-base);
    }
}

/* Responsive Grid System */
.grid-responsive {
    display: grid;
    gap: var(--space-lg);
    width: 100%;
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

/* Tablet Grid */
@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop Grid */
@media (min-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Auto-fit Grid */
.grid-auto-responsive {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

@media (max-width: 767px) {
    .grid-auto-responsive {
        grid-template-columns: 1fr;
    }
}

/* Statistics Grid */
.stats-grid-responsive {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: 1fr;
}

@media (min-width: 480px) {
    .stats-grid-responsive {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .stats-grid-responsive {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Responsive Tables */
.table-responsive-custom {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-responsive-custom table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-lg);
}

.table-responsive-custom th,
.table-responsive-custom td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid #dee2e6;
    font-size: var(--mobile-font-small);
}

.table-responsive-custom th {
    background: var(--light-bg);
    font-weight: 600;
    color: var(--dark-text);
    position: sticky;
    top: 0;
    z-index: 10;
}

/* Mobile Table Cards */
@media (max-width: 767px) {
    .table-mobile-cards {
        display: none;
    }
    
    .table-mobile-cards.active {
        display: block;
    }
    
    .table-responsive-custom table {
        display: none;
    }
    
    .table-responsive-custom table.active {
        display: table;
    }
    
    .mobile-card {
        background: #fff;
        border-radius: var(--radius-md);
        padding: var(--space-lg);
        margin-bottom: var(--space-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid #e9ecef;
    }
    
    .mobile-card-header {
        font-weight: 600;
        margin-bottom: var(--space-sm);
        color: var(--oily-green);
    }
    
    .mobile-card-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--space-xs) 0;
        border-bottom: 1px solid #f8f9fa;
    }
    
    .mobile-card-row:last-child {
        border-bottom: none;
    }
    
    .mobile-card-label {
        font-weight: 500;
        color: #6c757d;
        font-size: var(--mobile-font-small);
    }
    
    .mobile-card-value {
        font-weight: 500;
        color: var(--dark-text);
    }
}

/* Tablet Tables */
@media (min-width: 768px) {
    .table-responsive-custom th,
    .table-responsive-custom td {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--desktop-font-base);
    }
}

/* Responsive Sidebar */
.sidebar-responsive {
    width: 100%;
    background: var(--oily-green);
    color: #fff;
    transition: all 0.3s ease;
    position: fixed;
    top: 0;
    left: -100%;
    height: 100vh;
    z-index: 1040;
    overflow-y: auto;
    padding-top: 60px;
}

.sidebar-responsive.active {
    left: 0;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1035;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.sidebar-responsive .nav-link {
    color: rgba(255,255,255,0.9);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all 0.3s ease;
    border-radius: 0;
    font-weight: 500;
    min-height: var(--touch-target-min);
}

.sidebar-responsive .nav-link:hover,
.sidebar-responsive .nav-link:focus {
    color: var(--oily-golden);
    background: rgba(255,255,255,0.1);
    padding-left: calc(var(--space-lg) + var(--space-sm));
}

.sidebar-responsive .nav-link.active {
    color: #fff;
    background: var(--oily-golden);
}

.sidebar-responsive .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.sidebar-toggle {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.2rem;
    padding: var(--space-xs);
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.sidebar-toggle:hover {
    background: rgba(255,255,255,0.1);
}

/* Desktop Sidebar */
@media (min-width: 1024px) {
    .sidebar-responsive {
        position: static;
        width: 250px;
        height: auto;
        left: 0;
        padding-top: 0;
    }
    
    .sidebar-overlay {
        display: none;
    }
    
    .sidebar-toggle {
        display: none;
    }
}

/* Main Content Layout */
.main-content-responsive {
    flex: 1;
    padding: var(--space-md);
    min-height: calc(100vh - 60px);
    transition: all 0.3s ease;
}

@media (min-width: 768px) {
    .main-content-responsive {
        padding: var(--space-lg);
    }
}

@media (min-width: 1024px) {
    .main-content-responsive {
        padding: var(--space-xl);
    }
}

/* Layout Containers */
.container-responsive {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container-responsive {
        padding: 0 var(--space-lg);
    }
}

@media (min-width: 1024px) {
    .container-responsive {
        padding: 0 var(--space-xl);
    }
}

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

@media (min-width: 768px) {
    .container-fluid-responsive {
        padding: 0 var(--space-lg);
    }
}

/* Responsive Modals */
.modal-responsive {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1050;
    padding: var(--space-md);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-responsive.active {
    opacity: 1;
    visibility: visible;
}

.modal-content-responsive {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: all 0.3s ease;
}

.modal-responsive.active .modal-content-responsive {
    transform: scale(1);
}

.modal-header-responsive {
    padding: var(--space-lg);
    border-bottom: 1px solid #e9ecef;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title-responsive {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-text);
    margin: 0;
}

.modal-close-responsive {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: #6c757d;
    cursor: pointer;
    padding: var(--space-xs);
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.modal-close-responsive:hover {
    background: #f8f9fa;
    color: var(--dark-text);
}

.modal-body-responsive {
    padding: var(--space-lg);
}

.modal-footer-responsive {
    padding: var(--space-lg);
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
    flex-wrap: wrap;
}

/* Tablet Modals */
@media (min-width: 768px) {
    .modal-content-responsive {
        max-width: 600px;
    }
    
    .modal-title-responsive {
        font-size: 1.5rem;
    }
}

/* Desktop Modals */
@media (min-width: 1024px) {
    .modal-content-responsive {
        max-width: 800px;
    }
}

/* Responsive Alerts */
.alert-responsive {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    border: 1px solid transparent;
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.alert-success-responsive {
    background: #d1eddd;
    border-color: #badbcc;
    color: #0f5132;
}

.alert-danger-responsive {
    background: #f8d7da;
    border-color: #f5c2c7;
    color: #842029;
}

.alert-warning-responsive {
    background: #fff3cd;
    border-color: #ffecb5;
    color: #664d03;
}

.alert-info-responsive {
    background: #d1ecf1;
    border-color: #b6effb;
    color: #055160;
}

.alert-icon-responsive {
    font-size: 1.2rem;
    margin-top: 2px;
}

.alert-content-responsive {
    flex: 1;
}

.alert-title-responsive {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.alert-message-responsive {
    margin: 0;
    line-height: 1.5;
}

/* Responsive Badges */
.badge-responsive {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary-responsive {
    background: var(--oily-green);
    color: #fff;
}

.badge-secondary-responsive {
    background: var(--oily-golden);
    color: #fff;
}

.badge-success-responsive {
    background: var(--success-green);
    color: #fff;
}

.badge-danger-responsive {
    background: var(--danger-red);
    color: #fff;
}

.badge-warning-responsive {
    background: var(--warning-orange);
    color: #fff;
}

.badge-info-responsive {
    background: var(--info-blue);
    color: #fff;
}

/* Responsive Loading States */
.loading-responsive {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: #6c757d;
    font-size: var(--mobile-font-small);
}

.spinner-responsive {
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--oily-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Utilities */
.text-center-responsive { text-align: center; }
.text-left-responsive { text-align: left; }
.text-right-responsive { text-align: right; }

.d-none-mobile { display: none; }
.d-block-mobile { display: block; }
.d-flex-mobile { display: flex; }

@media (min-width: 768px) {
    .d-none-tablet { display: none; }
    .d-block-tablet { display: block; }
    .d-flex-tablet { display: flex; }
    .d-none-mobile { display: initial; }
}

@media (min-width: 1024px) {
    .d-none-desktop { display: none; }
    .d-block-desktop { display: block; }
    .d-flex-desktop { display: flex; }
}

/* Responsive Spacing */
.mt-responsive { margin-top: var(--space-md); }
.mb-responsive { margin-bottom: var(--space-md); }
.ml-responsive { margin-left: var(--space-md); }
.mr-responsive { margin-right: var(--space-md); }
.mx-responsive { margin-left: var(--space-md); margin-right: var(--space-md); }
.my-responsive { margin-top: var(--space-md); margin-bottom: var(--space-md); }

.pt-responsive { padding-top: var(--space-md); }
.pb-responsive { padding-bottom: var(--space-md); }
.pl-responsive { padding-left: var(--space-md); }
.pr-responsive { padding-right: var(--space-md); }
.px-responsive { padding-left: var(--space-md); padding-right: var(--space-md); }
.py-responsive { padding-top: var(--space-md); padding-bottom: var(--space-md); }

@media (min-width: 768px) {
    .mt-responsive { margin-top: var(--space-lg); }
    .mb-responsive { margin-bottom: var(--space-lg); }
    .ml-responsive { margin-left: var(--space-lg); }
    .mr-responsive { margin-right: var(--space-lg); }
    .mx-responsive { margin-left: var(--space-lg); margin-right: var(--space-lg); }
    .my-responsive { margin-top: var(--space-lg); margin-bottom: var(--space-lg); }
    
    .pt-responsive { padding-top: var(--space-lg); }
    .pb-responsive { padding-bottom: var(--space-lg); }
    .pl-responsive { padding-left: var(--space-lg); }
    .pr-responsive { padding-right: var(--space-lg); }
    .px-responsive { padding-left: var(--space-lg); padding-right: var(--space-lg); }
    .py-responsive { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
}

/* Print Styles */
@media print {
    .navbar-responsive,
    .sidebar-responsive,
    .btn-responsive,
    .modal-responsive {
        display: none !important;
    }
    
    .main-content-responsive {
        padding: 0;
        margin: 0;
    }
    
    .card-responsive {
        box-shadow: none;
        border: 1px solid #000;
    }
}