/* ASTP Space Settlement Contest - Unified CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #0a1f44;
    --secondary: #1a3a6c;
    --accent: #00b4d8;
    --light: #e6f7ff;
    --dark: #051326;
    --astp-red: #e63946;
    --astp-blue: #457b9d;
}

body {
    background-color: var(--dark);
    color: white;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(10, 31, 68, 0.8) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(26, 58, 108, 0.6) 0%, transparent 20%);
}

/* Stars Background */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    animation: twinkle 5s infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 1; }
}

/* Header & Navigation */
header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--astp-red), var(--astp-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-text h1 {
    font-size: 1.8rem;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}

.logo-text span {
    font-size: 0.8rem;
    color: #ccc;
}

/* Desktop Navigation */
.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Mobile Navigation Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1000;
}

/* Mobile Navigation Sidebar */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    z-index: 999;
    flex-direction: column;
    padding: 2rem 1rem;
    box-shadow: 4px 0 15px rgba(0, 0, 0, 0.3);
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    overflow-y: auto;
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-logo-img {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--astp-red), var(--astp-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1rem;
}

.mobile-logo-text {
    display: flex;
    flex-direction: column;
}

.mobile-logo-text h3 {
    font-size: 1.1rem;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}

.mobile-logo-text span {
    font-size: 0.7rem;
    color: #ccc;
}

.close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-nav a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-nav a i {
    width: 20px;
    text-align: center;
}

.mobile-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
    transform: translateX(5px);
}

.mobile-nav-footer {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.mobile-social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1rem 0;
}

.mobile-social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: all 0.3s;
    padding: 0;
}

.mobile-social-links a:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.overlay.active {
    display: block;
    opacity: 1;
}

/* Hero Section */
.hero {
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 180, 216, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(10, 31, 68, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(26, 58, 108, 0.2) 0%, transparent 50%);
    z-index: -1;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* Buttons */
.btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(to right, var(--accent), #0077b6);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 180, 216, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 180, 216, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-secondary:hover {
    background: rgba(0, 180, 216, 0.1);
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

/* Section Titles */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    display: inline-block;
    position: relative;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    border-radius: 2px;
}

/* Contest Details */
.contest-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.detail-card {
    background: rgba(10, 31, 68, 0.6);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s;
    border: 1px solid rgba(0, 180, 216, 0.2);
}

.detail-card:hover {
    transform: translateY(-10px);
}

.detail-card i {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.detail-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.detail-card p {
    line-height: 1.6;
    color: #ccc;
}

/* Forms */
.form-container {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.form-box {
    background: rgba(10, 31, 68, 0.7);
    border-radius: 15px;
    padding: 2.5rem;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 180, 216, 0.3);
}

.form-title {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--accent);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(5, 19, 38, 0.7);
    color: white;
    font-size: 1rem;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(0, 180, 216, 0.2);
}

.submit-btn {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(to right, var(--accent), #0077b6);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.submit-btn:hover {
    background: linear-gradient(to right, #0077b6, var(--accent));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 180, 216, 0.4);
}

.form-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: #ccc;
}

.form-footer a {
    color: var(--accent);
    text-decoration: none;
}

/* About Us Page Styles */
.content-card {
    background: rgba(10, 31, 68, 0.6);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(0, 180, 216, 0.2);
    margin-bottom: 2rem;
}

.content-card h3 {
    color: var(--accent);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-card p {
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: #e0e0e0;
}

.mission-vision {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.mission-card, .vision-card {
    background: rgba(5, 19, 38, 0.7);
    padding: 2rem;
    border-radius: 10px;
    border-left: 4px solid var(--accent);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.team-member {
    text-align: center;
    background: rgba(5, 19, 38, 0.7);
    padding: 2rem;
    border-radius: 10px;
    transition: transform 0.3s;
}

.team-member:hover {
    transform: translateY(-5px);
}

.member-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--astp-blue));
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

/* Contact Page Styles */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(5, 19, 38, 0.7);
    border-radius: 10px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(0, 180, 216, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent);
}

.contact-form {
    margin-top: 2rem;
}

/* Terms Page Styles */
.terms-content h3 {
    color: var(--accent);
    margin: 2rem 0 1rem;
}

.terms-content ul {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.terms-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Page Navigation */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.page-nav a {
    padding: 0.8rem 1.5rem;
    background: rgba(10, 31, 68, 0.6);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    border: 1px solid rgba(0, 180, 216, 0.3);
}

.page-nav a:hover {
    background: rgba(0, 180, 216, 0.2);
    transform: translateY(-2px);
}

/* Tabs */
.tab-container {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.tab {
    padding: 1rem 2rem;
    background: rgba(10, 31, 68, 0.6);
    border: none;
    color: white;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.tab.active {
    background: rgba(10, 31, 68, 0.9);
    border-bottom: 3px solid var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Footer */
footer {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    padding: 3rem 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 2rem 0;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: all 0.3s;
}

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

.copyright {
    color: #ccc;
    margin-top: 2rem;
    font-size: 0.9rem;
}

/* ASTP Info */
.astp-info {
    background: rgba(10, 31, 68, 0.6);
    border-radius: 15px;
    padding: 2rem;
    margin-top: 3rem;
    text-align: center;
}

.astp-info h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.astp-info a {
    color: var(--astp-red);
    text-decoration: none;
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .mobile-nav {
        display: flex;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.1rem;
        padding: 0 1rem;
    }
    
    .form-container {
        flex-direction: column;
        align-items: center;
    }
    
    .contest-details {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .detail-card {
        padding: 1.5rem;
    }
    
    .form-box {
        padding: 2rem 1.5rem;
        margin: 0 1rem;
    }
    
    .tab-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .tab {
        padding: 1rem;
        text-align: center;
    }
    
    .container {
        padding: 3rem 1rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .mission-vision {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .page-nav {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .page-nav a {
        text-align: center;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1rem;
    }
    
    .logo-text h1 {
        font-size: 1.4rem;
    }
    
    .logo-text span {
        font-size: 0.7rem;
    }
    
    .logo-img {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .container {
        padding: 2rem 1rem;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .form-box {
        padding: 1.5rem 1rem;
    }
    
    .mobile-nav {
        width: 260px;
    }
    
    .mobile-nav a {
        font-size: 1rem;
        padding: 0.8rem 1.2rem;
    }
    
    .btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.9rem;
    }
}