/* Mobile-Responsive Design System */
/* ================================ */

/* CSS Variables for Consistent Design */
:root {
    /* Colors */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    --secondary-50: #f8fafc;
    --secondary-100: #f1f5f9;
    --secondary-200: #e2e8f0;
    --secondary-300: #cbd5e1;
    --secondary-400: #94a3b8;
    --secondary-500: #64748b;
    --secondary-600: #475569;
    --secondary-700: #334155;
    --secondary-800: #1e293b;
    --secondary-900: #0f172a;

    --success-50: #ecfdf5;
    --success-100: #d1fae5;
    --success-500: #10b981;
    --success-600: #059669;

    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;

    --error-50: #fef2f2;
    --error-100: #fee2e2;
    --error-500: #ef4444;
    --error-600: #dc2626;

    /* 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: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Typography */
    --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: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Base Styles */
/* ============ */

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: var(--leading-normal);
    color: var(--secondary-800);
    background-color: var(--secondary-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container System */
/* ================ */

.container-responsive {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
    .container-responsive {
        padding: 0 var(--spacing-lg);
    }
}

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

/* Grid System */
/* =========== */

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (min-width: 640px) {
    .sm\:grid-cols-1 {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }

    .sm\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sm\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sm\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (min-width: 768px) {
    .md\:grid-cols-1 {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }

    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .md\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .md\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-1 {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }

    .lg\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lg\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .lg\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

/* Flexbox Utilities */
/* ================= */

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-start {
    justify-content: flex-start;
}

.justify-end {
    justify-content: flex-end;
}

.flex-1 {
    flex: 1 1 0%;
}

.flex-auto {
    flex: 1 1 auto;
}

/* Spacing Utilities */
/* ================= */

.gap-1 {
    gap: var(--spacing-xs);
}

.gap-2 {
    gap: var(--spacing-sm);
}

.gap-4 {
    gap: var(--spacing-md);
}

.gap-6 {
    gap: var(--spacing-lg);
}

.gap-8 {
    gap: var(--spacing-xl);
}

.p-1 {
    padding: var(--spacing-xs);
}

.p-2 {
    padding: var(--spacing-sm);
}

.p-4 {
    padding: var(--spacing-md);
}

.p-6 {
    padding: var(--spacing-lg);
}

.p-8 {
    padding: var(--spacing-xl);
}

.px-1 {
    padding-left: var(--spacing-xs);
    padding-right: var(--spacing-xs);
}

.px-2 {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
}

.px-4 {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.px-6 {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

.px-8 {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
}

.py-1 {
    padding-top: var(--spacing-xs);
    padding-bottom: var(--spacing-xs);
}

.py-2 {
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.py-4 {
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.py-6 {
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

.py-8 {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.m-1 {
    margin: var(--spacing-xs);
}

.m-2 {
    margin: var(--spacing-sm);
}

.m-4 {
    margin: var(--spacing-md);
}

.m-6 {
    margin: var(--spacing-lg);
}

.m-8 {
    margin: var(--spacing-xl);
}

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

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

.mb-4 {
    margin-bottom: var(--spacing-md);
}

.mb-6 {
    margin-bottom: var(--spacing-lg);
}

.mb-8 {
    margin-bottom: var(--spacing-xl);
}

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

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

.mt-4 {
    margin-top: var(--spacing-md);
}

.mt-6 {
    margin-top: var(--spacing-lg);
}

.mt-8 {
    margin-top: var(--spacing-xl);
}

/* Card Components */
/* =============== */

.card-modern {
    background: var(--secondary-50);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.card-header-modern {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: var(--secondary-50);
    border-bottom: 1px solid var(--primary-500);
}

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

.card-footer-modern {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--secondary-50);
    border-top: 1px solid var(--secondary-200);
}

/* Form Components */
/* =============== */

.form-group-modern {
    margin-bottom: var(--spacing-lg);
}

.form-label-modern {
    display: block;
    font-weight: var(--font-semibold);
    color: var(--secondary-700);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.form-control-modern {
    display: block;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--secondary-900);
    background-color: var(--secondary-50);
    border: 2px solid var(--secondary-300);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-control-modern:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgb(0 120 215 / 0.1);
    transform: translateY(-1px);
}

.form-control-modern:disabled {
    background-color: var(--secondary-100);
    color: var(--secondary-500);
    cursor: not-allowed;
}

.form-select-modern {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    appearance: none;
}

/* Button Components */
/* ================= */

.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-modern:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary-modern {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: var(--secondary-50);
    box-shadow: var(--shadow-md);
}

.btn-primary-modern:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary-modern {
    background: var(--secondary-50);
    color: var(--secondary-700);
    border-color: var(--secondary-300);
    box-shadow: var(--shadow-sm);
}

.btn-secondary-modern:hover:not(:disabled) {
    background: var(--secondary-50);
    border-color: var(--secondary-400);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-success-modern {
    background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
    color: var(--secondary-50);
    box-shadow: var(--shadow-md);
}

.btn-success-modern:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--success-600) 0%, var(--success-700) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-sm-modern {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg-modern {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* Alert Components */
/* ================ */

.alert-modern {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.alert-success-modern {
    background-color: var(--success-50);
    border-color: var(--success-200);
    color: var(--success-800);
}

.alert-warning-modern {
    background-color: var(--warning-50);
    border-color: var(--warning-200);
    color: var(--warning-800);
}

.alert-error-modern {
    background-color: var(--error-50);
    border-color: var(--error-200);
    color: var(--error-800);
}

.alert-info-modern {
    background-color: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-800);
}

/* Badge Components */
/* ================ */

.badge-modern {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-md);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-primary-modern {
    background-color: var(--primary-100);
    color: var(--primary-800);
}

.badge-success-modern {
    background-color: var(--success-100);
    color: var(--success-800);
}

.badge-warning-modern {
    background-color: var(--warning-100);
    color: var(--warning-800);
}

.badge-error-modern {
    background-color: var(--error-100);
    color: var(--error-800);
}

/* Loading States */
/* ============== */

.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--secondary-300);
    border-radius: 50%;
    border-top-color: var(--primary-600);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgb(248 250 252 / 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}

/* Animation Classes */
/* ================= */

.animate-fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

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

.animate-bounce-in {
    animation: bounceIn 0.8s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }

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

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }

    50% {
        transform: scale(1.05);
    }

    70% {
        transform: scale(0.9);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Mobile-First Responsive Breakpoints */
/* =================================== */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
    .container-responsive {
        max-width: 540px;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .container-responsive {
        max-width: 720px;
    }

    .md\:flex-row {
        flex-direction: row;
    }

    .md\:items-center {
        align-items: center;
    }

    .md\:justify-between {
        justify-content: space-between;
    }

    .md\:text-left {
        text-align: left;
    }

    .md\:text-center {
        text-align: center;
    }

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

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .container-responsive {
        max-width: 960px;
    }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .container-responsive {
        max-width: 1140px;
    }
}

/* Mobile-Specific Styles */
/* ====================== */

@media (max-width: 767px) {
    .mobile-stack {
        flex-direction: column !important;
    }

    .mobile-full-width {
        width: 100% !important;
    }

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

    .mobile-mb-4 {
        margin-bottom: var(--spacing-md) !important;
    }

    .mobile-p-4 {
        padding: var(--spacing-md) !important;
    }

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

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

    .btn-modern {
        width: 100%;
        justify-content: center;
    }

    .form-control-modern {
        font-size: 16px;
        /* Prevents zoom on iOS */
    }
}

/* Touch-Friendly Interactions */
/* =========================== */

@media (hover: none) and (pointer: coarse) {
    .btn-modern {
        min-height: 44px;
        /* iOS recommended touch target size */
    }

    .form-control-modern {
        min-height: 44px;
    }

    .card-modern:hover {
        transform: none;
        /* Disable hover effects on touch devices */
    }
}

/* High DPI Display Support */
/* ======================== */

@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {
    .card-modern {
        border-width: 0.5px;
    }
}



/* Print Styles */
/* ============ */

@media print {
    .no-print {
        display: none !important;
    }

    .card-modern {
        box-shadow: none;
        border: 1px solid var(--secondary-900);
    }

    .btn-modern {
        display: none;
    }
}

/* Accessibility Improvements */
/* =========================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.focus-visible:focus {
    outline: 2px solid var(--primary-600);
    outline-offset: 2px;
}

/* 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;
    }
}