/* --- CSS Reset & Variables --- */
:root {
    --primary-color: #6a040f;
    --primary-light: #9d0208;
    --secondary-color: #D4AF37;
    --secondary-hover: #C5A028;
    --bg-color: #F8FAFC;
    --text-main: #0f172a;
    --text-muted: #475569;
    --white: #ffffff;
    --error: #ef4444;
    --success: #10b981;
    --border-color: #cbd5e1;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --glass-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s ease-in-out;
    --nav-height: 70px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    padding-top: var(--nav-height); /* Prevent overlap with fixed nav */
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-weight: 600;
    color: var(--primary-color);
}

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

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    width: 40px;
    height: auto;
}

.nav-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

.btn-register-nav {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 50px;
}

.btn-register-nav:hover {
    background-color: var(--primary-light);
    color: var(--white);
    box-shadow: 0 4px 10px rgba(114,0,0,0.2);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* --- Hero Section --- */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, var(--primary-color) 0%, #4a0000 100%);
    color: var(--white);
    padding: 60px 20px 80px; /* Adjusted padding */
    text-align: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" stroke="rgba(255,215,0,0.1)" stroke-width="2" fill="none"/></svg>') repeat;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    color: var(--secondary-color);
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-content h2 {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 20px;
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 20px;
}

/* --- Container & Layout --- */
.container {
    max-width: 1000px;
    margin: -60px auto 40px; /* Pulls form up over hero */
    padding: 0 20px;
    position: relative;
    z-index: 10;
}

/* --- Why Participate Section --- */
.why-participate {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 25px 20px;
    margin-bottom: 40px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background-color: var(--secondary-color);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    align-items: stretch;
}

.feature-card {
    padding: 20px 15px;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.05);
    border-color: var(--secondary-color);
}

.feature-icon {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.feature-card h4 {
    color: var(--text-main);
    font-size: 0.95rem;
    line-height: 1.4;
    margin: 0;
}

/* --- Registration Form --- */
.registration-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--border-radius);
    padding: 50px;
    box-shadow: var(--glass-shadow);
    max-width: 950px; /* Requested max width */
    margin: 0 auto;
}

.card-title {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-main);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.full-width {
    grid-column: 1 / -1;
}

.form-group {
    margin-bottom: 10px; /* Reduced margin, handled by grid gap */
    position: relative;
}

/* Floating Labels */
.floating-label-group {
    position: relative;
    padding-top: 15px; /* Space for label to float up */
}

.floating-label-group input,
.floating-label-group select,
.floating-label-group textarea {
    width: 100%;
    padding: 16px 14px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
    background-color: transparent; /* Changed for floating label */
    position: relative;
    z-index: 2;
}

/* Background for select to prevent text overlap */
.floating-label-group select {
    background-color: #fff;
}

.floating-label-group label {
    position: absolute;
    top: 30px; /* Initial vertical position inside input */
    left: 14px;
    font-size: 1rem;
    color: var(--text-muted);
    transition: var(--transition);
    pointer-events: none; /* Let clicks pass through to input */
    z-index: 3;
    background-color: rgba(255,255,255,0.9);
    padding: 0 4px;
}

/* Floating Action */
.floating-label-group input:focus ~ label,
.floating-label-group input:not(:placeholder-shown) ~ label,
.floating-label-group select:focus ~ label,
.floating-label-group select:valid ~ label,
.floating-label-group textarea:focus ~ label,
.floating-label-group textarea:not(:placeholder-shown) ~ label {
    top: 5px;
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 500;
}

.static-label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(106, 4, 15, 0.1);
}

textarea {
    resize: vertical;
}

.help-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
    margin-top: 4px;
}

.error-message {
    color: var(--error);
    font-size: 0.85rem;
    margin-top: 4px;
    display: block;
    min-height: 20px;
}

.form-group.invalid input,
.form-group.invalid select,
.form-group.invalid textarea {
    border-color: var(--error);
}

.form-group.invalid .floating-label-group label {
    color: var(--error);
}

/* --- Cards for Radio/Checkboxes --- */
.radio-grid,
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
}

.radio-card input,
.checkbox-card input {
    display: none;
}

.radio-card span,
.checkbox-card span {
    display: block;
    padding: 12px 15px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    user-select: none;
}

.radio-card:hover span,
.checkbox-card:hover span {
    background: var(--bg-color);
    border-color: var(--primary-light);
}

.radio-card input:checked + span,
.checkbox-card input:checked + span {
    background: #fdf2f2;
    color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: 500;
    box-shadow: 0 0 0 1px var(--primary-color);
}

.form-group.invalid .radio-card span,
.form-group.invalid .checkbox-card span {
    border-color: var(--error);
}

/* --- Character Counter --- */
.char-counter {
    position: absolute;
    right: 14px;
    top: -5px; /* Adjusted due to floating label padding */
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Toggle Switch --- */
.toggle-switch {
    display: flex;
    gap: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    width: max-content;
    background: #fff;
}

.toggle-switch input {
    display: none;
}

.toggle-btn {
    padding: 10px 30px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.toggle-switch input:checked + .toggle-btn {
    background: #fdf2f2;
    color: var(--primary-color);
    font-weight: 600;
}

.form-group.invalid .toggle-switch {
    border-color: var(--error);
}

/* --- Custom Radio Inline --- */
.radio-inline {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.custom-radio {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    padding-left: 30px;
    font-weight: 400;
}

.custom-radio input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.radio-mark {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 20px;
    width: 20px;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    transition: var(--transition);
}

.custom-radio input:checked ~ .radio-mark {
    border-color: var(--primary-color);
}

.custom-radio input:checked ~ .radio-mark::after {
    content: '';
    position: absolute;
    display: block;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary-color);
}

/* --- Submit Button --- */
.submit-btn {
    width: 100%;
    padding: 16px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.submit-btn:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(114,0,0,0.2);
}

.submit-btn i {
    transition: transform 0.3s ease;
}

.submit-btn:hover i {
    transform: translateX(5px);
}

/* --- Footer --- */
.site-footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 50px 20px 30px;
    text-align: center;
    margin-top: 60px;
}

.footer-content h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.tagline {
    font-style: italic;
    opacity: 0.9;
    margin-bottom: 20px;
}

.social-links {
    margin-bottom: 20px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    background: rgba(255,255,255,0.1);
    color: var(--white);
    border-radius: 50%;
    margin: 0 5px;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.copyright {
    font-size: 0.85rem;
    opacity: 0.7;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    max-width: 600px;
    margin: 0 auto;
}

.developed-by {
    font-size: 0.85rem;
    margin-top: 10px;
    opacity: 0.9;
}

.developed-by a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.developed-by a:hover {
    color: var(--white);
    text-decoration: underline;
}

/* --- Modal --- */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: 0 25px 50px rgba(0,0,0,0.2);
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.success-icon {
    font-size: 4rem;
    color: var(--success);
    margin-bottom: 20px;
}

.modal-content h2 {
    color: var(--text-main);
    margin-bottom: 15px;
}

.modal-content p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.btn-primary {
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

/* --- Animations --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive Design Breakpoints --- */

/* 1440px+: Desktops (Default styling handles this well, max-width applied to containers) */

/* 1024px: Laptops / Tablets Landscape */
@media (max-width: 1024px) {
    .registration-card {
        padding: 40px 30px;
    }
}

/* 768px: Tablets Portrait */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: -100%;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        padding: 20px 0;
        gap: 20px;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .btn-register-nav {
        display: inline-block;
        width: auto;
    }

    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content h2 {
        font-size: 1.2rem;
    }
    
    /* Collapse form grid to single column */
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .registration-card {
        padding: 30px 20px;
    }
    
    .container {
        margin-top: -30px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 425px: Large Mobile */
@media (max-width: 425px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .radio-grid,
    .checkbox-grid {
        grid-template-columns: 1fr 1fr; /* Two columns for tiny cards */
        gap: 10px;
    }
    
    .radio-card span,
    .checkbox-card span {
        padding: 10px;
        font-size: 0.85rem;
    }
    
    .radio-inline {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
}

/* 375px: Standard Mobile */
@media (max-width: 375px) {
    .radio-grid,
    .checkbox-grid {
        grid-template-columns: 1fr; /* Single column for very small */
    }
    
    .nav-title {
        font-size: 1rem;
    }
}

/* 320px: Small Mobile */
@media (max-width: 320px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }
    
    .card-title {
        font-size: 1.5rem;
    }
    
    .registration-card {
        padding: 20px 15px;
    }
}