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

:root {
    --primary: #00d4ff;
    --primary-dark: #00b8e6;
    --secondary: #7c3aed;
    --accent: #06b6d4;
    --dark: #0f172a;
    --dark-lighter: #1e293b;
    --gray: #64748b;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --shadow: 0 10px 40px rgba(0,0,0,0.3);
    --shadow-hover: 0 20px 60px rgba(0,0,0,0.4);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--light);
    background: linear-gradient(to bottom, #0f172a 0%, #1e293b 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

html {
    overflow-x: hidden;
    width: 100%;
}

/* Navigation */
nav {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

nav.scrolled {
    padding: 0.5rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

/* Main Content */
main {
    margin-top: 80px;
    min-height: calc(100vh - 80px - 200px);
    width: 100%;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    box-sizing: border-box;
}

/* Hero Section */
.hero {
    background: var(--gradient);
    color: var(--white);
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 2px solid rgba(0, 212, 255, 0.3);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero p {
    font-size: 1.5rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

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

/* Cards */
.card {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(0, 212, 255, 0.3);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--gradient-primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.4);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 212, 255, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: none;
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--dark);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.4);
}

/* Footer */
footer {
    background: rgba(15, 23, 42, 0.95);
    color: var(--white);
    padding: 3rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section a {
    color: var(--light);
    text-decoration: none;
    display: block;
    margin: 0.5rem 0;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.social-links a:hover {
    transform: scale(1.1) rotate(5deg);
}

.copyright {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.7;
}

/* Flash Messages */
.flash-messages {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 1001;
    max-width: 400px;
}

.flash {
    padding: 1.2rem 1.5rem;
    margin-bottom: 1rem;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(0, 212, 255, 0.3);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    animation: slideInRight 0.5s ease;
    color: var(--light);
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.flash.success {
    border-color: #48bb78;
    background: rgba(72, 187, 120, 0.15);
}

.flash.success::before {
    content: '✅';
    font-size: 1.5rem;
}

.flash.error {
    border-color: #f56565;
    background: rgba(245, 101, 101, 0.15);
}

.flash.error::before {
    content: '❌';
    font-size: 1.5rem;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
    background: transparent;
    border: none;
    z-index: 1002;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-container {
        position: relative;
        padding: 1rem;
        width: 100%;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        gap: 2rem;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
        transition: right 0.4s ease;
        border-left: 2px solid rgba(0, 212, 255, 0.3);
        z-index: 1001;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        font-size: 1.2rem;
        padding: 0.8rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links a::after {
        bottom: 0;
    }

    .logo {
        font-size: 1.4rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .container {
        padding: 1rem;
        width: 100%;
        max-width: 100%;
    }

    .btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.95rem;
    }

    .flash-messages {
        right: 10px;
        left: 10px;
        max-width: calc(100% - 20px);
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .logo {
        font-size: 1.3rem;
    }

    .nav-links {
        width: 100%;
        right: -100%;
    }
}