@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap");

/* ===== CSS RESET & BASE ===== */
html, body, div, span, applet, object,
iframe, h1, h2, h3, h4, h5, h6, p, blockquote,
pre, a, abbr, acronym, address, big, cite,
code, del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var, b,
u, i, center, dl, dt, dd, ol, ul, li, fieldset,
form, label, legend, table, caption, tbody,
tfoot, thead, tr, th, td, article, aside,
canvas, details, embed, figure, figcaption,
footer, header, hgroup, menu, nav, output, ruby,
section, summary, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
    display: block;
}

body {
    line-height: 1.6;
}

ol, ul {
    list-style: none;
}

blockquote, q {
    quotes: none;
}

blockquote:before, blockquote:after, q:before, q:after {
    content: '';
    content: none;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* ===== MODERN BASE STYLES ===== */
:root {
    /* Color System */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;
    
    --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: #f0fdf4;
    --success-500: #22c55e;
    --success-600: #16a34a;
    
    --warning-50: #fffbeb;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    
    --error-50: #fef2f2;
    --error-500: #ef4444;
    --error-600: #dc2626;
    
    /* 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

html {
    box-sizing: border-box;
    scroll-behavior: smooth;
}

*, *:before, *:after {
    box-sizing: inherit;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--secondary-700);
    background-color: var(--secondary-50);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--secondary-900);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-4);
    letter-spacing: -0.025em;
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
}

h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
}

h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

h5 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

h6 {
    font-size: var(--font-size-base);
    font-weight: 600;
}

p {
    margin-bottom: var(--space-4);
    color: var(--secondary-600);
}

strong {
    font-weight: 600;
    color: var(--secondary-800);
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--primary-700);
    text-decoration: underline;
}

/* ===== MODERN BUTTON SYSTEM ===== */
.button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    outline: none;
    position: relative;
    overflow: hidden;
}

.button:focus, .btn:focus {
    ring: 2px solid var(--primary-500);
    ring-offset: 2px;
}

/* Primary Button */
.button, .btn-primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: white;
    border-color: var(--primary-600);
    box-shadow: var(--shadow-md);
}

.button:hover, .btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
    text-decoration: none;
}

/* Secondary Button */
.btn-secondary {
    background: white;
    color: var(--secondary-700);
    border-color: var(--secondary-300);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--secondary-50);
    border-color: var(--secondary-400);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

/* ===== MODERN CONTAINER SYSTEM ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (max-width: 1280px) {
    .container {
        max-width: 1024px;
        padding: 0 var(--space-5);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

/* ===== MODERN GRID SYSTEM ===== */
.row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    margin: 0;
}

.col-1 { flex: 0 0 calc(8.333% - var(--space-6)); }
.col-2 { flex: 0 0 calc(16.667% - var(--space-6)); }
.col-3 { flex: 0 0 calc(25% - var(--space-6)); }
.col-4 { flex: 0 0 calc(33.333% - var(--space-6)); }
.col-5 { flex: 0 0 calc(41.667% - var(--space-6)); }
.col-6 { flex: 0 0 calc(50% - var(--space-6)); }
.col-7 { flex: 0 0 calc(58.333% - var(--space-6)); }
.col-8 { flex: 0 0 calc(66.667% - var(--space-6)); }
.col-9 { flex: 0 0 calc(75% - var(--space-6)); }
.col-10 { flex: 0 0 calc(83.333% - var(--space-6)); }
.col-11 { flex: 0 0 calc(91.667% - var(--space-6)); }
.col-12 { flex: 0 0 calc(100% - var(--space-6)); }

@media (max-width: 768px) {
    .row {
        gap: var(--space-4);
    }
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
    .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
        flex: 0 0 100%;
    }
}

/* ===== MODERN FORM SYSTEM ===== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    color: var(--secondary-700);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--secondary-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    background-color: white;
    transition: all 0.2s ease;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgb(14 165 233 / 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--secondary-400);
}

/* ===== MODERN CARD SYSTEM ===== */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
    transition: all 0.3s ease;
}

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

.card-header {
    padding: var(--space-6) var(--space-6) 0;
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: 0 var(--space-6) var(--space-6);
    border-top: 1px solid var(--secondary-200);
    margin-top: var(--space-6);
    padding-top: var(--space-6);
}

/* ===== MODERN ALERT SYSTEM ===== */
.alert {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid;
    margin: var(--space-4) 0;
    font-weight: 500;
}

.alert-success {
    background-color: var(--success-50);
    border-color: var(--success-500);
    color: var(--success-600);
}

.alert-warning {
    background-color: var(--warning-50);
    border-color: var(--warning-500);
    color: var(--warning-600);
}

.alert-error {
    background-color: var(--error-50);
    border-color: var(--error-500);
    color: var(--error-600);
}

/* ===== MODERN HEADER SYSTEM ===== */
#header-wrapper {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 50%, var(--primary-800) 100%);
    padding: var(--space-4) 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

#header-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><radialGradient id="grain"><stop offset="0%" stop-color="white" stop-opacity="0.03"/><stop offset="100%" stop-color="white" stop-opacity="0"/></radialGradient></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
}

#header {
    position: relative;
    z-index: 2;
    text-align: center;
}

#nav {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-2);
    border-radius: var(--space-8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl);
}

#nav a {
    color: white;
    padding: var(--space-3) var(--space-6);
    margin: 0 var(--space-1);
    border-radius: var(--space-6);
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

#nav a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

#nav a:hover::before {
    left: 100%;
}

#nav a:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
    text-decoration: none;
}

#nav a.current-page-item {
    background: rgba(255, 255, 255, 0.25);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

/* ===== MODERN BANNER SYSTEM ===== */
#banner-wrapper {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 50%, var(--primary-800) 100%);
    position: relative;
    overflow: hidden;
    padding: var(--space-20) 0;
}

#banner-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="white" opacity="0.1"><polygon points="0,0 1000,100 1000,0"/></svg>');
    background-size: cover;
}

#banner {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

#banner h1,
#banner h2 {
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

#banner span {
    display: block;
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin: var(--space-4) 0 var(--space-8);
}

/* ===== MODERN MAIN CONTENT ===== */
#main {
    background: white;
    padding: var(--space-16) 0;
    min-height: 50vh;
}

/* ===== MODERN FOOTER SYSTEM ===== */
#footer-wrapper {
    background: var(--secondary-900);
    color: var(--secondary-400);
    padding: var(--space-16) 0 var(--space-8);
}

#copyright {
    text-align: center;
    color: var(--secondary-500);
    border-top: 1px solid var(--secondary-800);
    padding: var(--space-8) 0 0;
    margin: var(--space-8) 0 0;
    font-size: var(--font-size-sm);
}

#copyright a {
    color: var(--secondary-400);
}

#copyright a:hover {
    color: var(--secondary-300);
}

/* ===== MODERN UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: var(--space-2) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }
.mb-8 { margin-bottom: var(--space-8) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-2 { margin-top: var(--space-2) !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-6 { margin-top: var(--space-6) !important; }
.mt-8 { margin-top: var(--space-8) !important; }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }

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

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ===== MODERN RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --space-16: 3rem;
        --space-20: 4rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --space-16: 2rem;
        --space-20: 3rem;
    }
    
    #nav {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        padding: var(--space-2);
    }
    
    #nav a {
        margin: var(--space-1) 0;
        text-align: center;
    }
    
    #banner {
        padding: 0 var(--space-4);
    }
    
    .container {
        padding: 0 var(--space-4);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 1.5rem;
        --font-size-3xl: 1.25rem;
        --space-16: 1.5rem;
        --space-20: 2rem;
    }
    
    .card-body {
        padding: var(--space-4);
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: var(--font-size-base);
    }
}

/* ===== MODERN ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

.animate-slide-in-left {
    animation: slideInFromLeft 0.6s ease-out;
}

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

.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;
}

/* ===== MODERN LOADING STATES ===== */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--secondary-300);
    border-top: 2px solid var(--primary-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ===== MODERN FOCUS STYLES ===== */
*:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

.focus-visible:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Remove outline for mouse users */
.js-focus-visible *:focus:not(.focus-visible) {
    outline: none;
}