/* ===== CSS Variables ===== */
:root {
    --color-primary: hsl(210, 100%, 12%);
    --color-primary-light: hsl(210, 80%, 25%);
    --color-accent: hsl(195, 85%, 45%);
    --color-accent-dark: hsl(195, 85%, 35%);
    --color-bg: hsl(210, 20%, 98%);
    --color-surface: hsl(0, 0%, 100%);
    --color-text: hsl(210, 15%, 20%);
    --color-text-muted: hsl(210, 10%, 45%);
    --color-border: hsl(210, 15%, 90%);
    
    --gradient-hero: linear-gradient(135deg, 
        hsl(210, 100%, 12%) 0%, 
        hsl(210, 80%, 25%) 50%, 
        hsl(195, 85%, 35%) 100%);
    
    --gradient-accent: linear-gradient(135deg, 
        hsl(195, 85%, 55%) 0%, 
        hsl(195, 85%, 45%) 100%);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    
    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-display: 'Space Grotesk', var(--font-base);
    
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Base Reset ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: 0 24px;
    height: 70px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-primary);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
}

.nav-brand:hover {
    transform: translateY(-2px);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: var(--color-accent);
    background: hsla(195, 85%, 45%, 0.05);
}

.nav-links a:hover::after {
    width: 80%;
}

.nav-links a.active {
    color: var(--color-accent);
    background: hsla(195, 85%, 45%, 0.1);
    font-weight: 600;
}

.nav-links a.active::after {
    width: 80%;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.scroll-to-top:active {
    transform: translateY(-2px);
}

/* Form Progress Indicator */
.form-progress {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-border);
    z-index: 999;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-background {
    position: absolute;
    inset: 0;
    opacity: 0.15;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255, 255, 255, 0.03) 2px, rgba(255, 255, 255, 0.03) 4px);
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(2deg); }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-container {
    margin-bottom: 2rem;
}

.logo {
    height: 100px;
    width: auto;
    object-fit: contain;
    filter: brightness(0) invert(1);
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-date {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.03); opacity: 0.9; }
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 700px;
    margin: 0 auto 1rem;
    opacity: 0.9;
    line-height: 1.6;
}

.deadline {
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    margin-bottom: 2.5rem;
    opacity: 0.85;
}

.highlight {
    color: hsl(45, 100%, 70%);
    font-weight: 600;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    background: white;
    border: none;
    border-radius: var(--radius);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.cta-button svg {
    transition: var(--transition);
}

.cta-button:hover svg {
    transform: translateY(3px);
}

/* ===== About Section ===== */
.about {
    padding: 6rem 0;
    background: var(--color-bg);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.divider {
    width: 80px;
    height: 4px;
    background: var(--gradient-accent);
    margin: 0 auto 3rem;
    border-radius: 2px;
}

.intro-text {
    font-size: 1.2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    padding: 2.5rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.feature-card:nth-child(2) .feature-icon {
    animation-delay: 0.5s;
}

.feature-card:nth-child(3) .feature-icon {
    animation-delay: 1s;
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ===== Submission Section ===== */
.submission {
    padding: 6rem 0;
    background: linear-gradient(to bottom, var(--color-bg), var(--color-surface));
}

.submission-form {
    max-width: 700px;
    margin: 0 auto;
    padding: 3rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

/* ===== Form Group with Floating Label Effect ===== */
.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-base);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px hsla(195, 85%, 45%, 0.1);
    transform: translateY(-1px);
}

.form-group input:valid:not(:placeholder-shown),
.form-group textarea:valid:not(:placeholder-shown) {
    border-color: #16a34a;
}

.form-group input.error,
.form-group textarea.error,
.form-group select.error {
    border-color: #dc2626;
    background: #fef2f2;
}

.form-group .error-message {
    color: #dc2626;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    display: none;
}

.form-group.has-error .error-message {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.word-count {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    text-align: right;
}

.submit-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

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

.submit-button:active {
    transform: translateY(0);
}

.submit-button svg {
    transition: var(--transition);
}

.submit-button:hover svg {
    transform: translateX(5px);
}

/* ===== Page Header (for apply/admin) ===== */
.page-header {
    padding: 8rem 0 3rem;
    background: var(--gradient-hero);
    color: white;
    text-align: center;
}

.page-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 1rem;
}

.deadline-banner {
    font-size: 0.95rem;
    opacity: 0.85;
}

/* ===== Form Section Title ===== */
.form-section-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

/* ===== Select Dropdown ===== */
.form-group select {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-base);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23666' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-group select:focus {
    border-color: var(--color-accent);
    background-color: var(--color-surface);
    box-shadow: 0 0 0 3px hsla(195, 85%, 45%, 0.1);
}

/* ===== Status Message ===== */
.status-message {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.status-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.status-success {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

/* ===== Benefits Section ===== */
.benefits {
    padding: 6rem 0;
    background: linear-gradient(to bottom, var(--color-surface), var(--color-bg));
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin: 3rem 0;
}

.benefit-item {
    text-align: left;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.benefit-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: var(--transition);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.benefit-item:hover::before {
    transform: scaleX(1);
}

.benefit-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    line-height: 1;
}

.benefit-item h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.benefit-item p {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.cta-section {
    text-align: center;
    margin-top: 3rem;
}

/* ===== Footer ===== */
.footer {
    padding: 3rem 0;
    background: var(--color-primary);
    color: white;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
    opacity: 0.9;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-accent);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .hero {
        min-height: 90vh;
        padding-top: 70px;
    }
    
    .logo {
        height: 70px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .submission-form {
        padding: 2rem 1.5rem;
    }
    
    .features-grid {
        gap: 1.5rem;
    }
    
    .about,
    .submission {
        padding: 4rem 0;
    }

    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1.5rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        width: 100%;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        text-align: left;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    .page-header {
        padding: 6rem 0 2rem;
    }

    .stat-card {
        padding: 1.25rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .cta-button {
        padding: 14px 28px;
        font-size: 1rem;
    }
    
    .submission-form {
        padding: 1.5rem 1rem;
    }

    .stats-bar {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .nav-brand span {
        font-size: 0.95rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
    }
}

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