/* CSS Variables for Theme */
:root {
    --bg-primary: #000;
    --bg-secondary: #0a0a0a;
    --bg-card: rgba(102, 126, 234, 0.1);
    --bg-card-hover: rgba(102, 126, 234, 0.15);
    --text-primary: #fff;
    --text-secondary: #aaa;
    --text-tertiary: #888;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-hover: rgba(102, 126, 234, 0.5);
    --input-bg: rgba(255, 255, 255, 0.05);
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: rgba(102, 126, 234, 0.05);
    --bg-card-hover: rgba(102, 126, 234, 0.1);
    --text-primary: #000;
    --text-secondary: #555;
    --text-tertiary: #777;
    --border-color: rgba(0, 0, 0, 0.1);
    --border-color-hover: rgba(102, 126, 234, 0.5);
    --input-bg: rgba(0, 0, 0, 0.05);
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-primary);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s ease;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    cursor: pointer;
    z-index: 1001;
}

.nav-center {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Theme Toggle */
.theme-toggle {
    width: 50px;
    height: 26px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 13px;
    position: relative;
    cursor: pointer;
    transition: background 0.3s;
}

.theme-toggle:hover {
    background: var(--bg-card);
}

.theme-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    border-radius: 50%;
    transition: transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

[data-theme="light"] .theme-slider {
    transform: translateX(24px);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s;
}

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

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* CTA Button */
.cta-button {
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    border: none;
    border-radius: 25px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    white-space: nowrap;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 100px auto 50px;
    padding: 0 50px;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: 60px;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-header p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Form Styles */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.form-group select,
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s, background 0.3s;
}

.form-group select:focus,
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gradient-start);
    background: var(--bg-card);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Buttons */
.btn-primary {
    padding: 15px 40px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    border: none;
    border-radius: 12px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

/* Cards */
.card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card) 100%);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    transition: transform 0.3s, border-color 0.3s, background 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--border-color-hover);
    background: var(--bg-card-hover);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    padding: 60px 50px 30px;
    border-top: 1px solid var(--border-color);
    margin-top: 100px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 18px;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
}

/* Animations */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: slideIn 0.5s ease-out;
}

/* Mobile Responsive */
@media (max-width: 968px) {
    nav {
        padding: 15px 30px;
    }

    .container {
        padding: 0 30px;
        margin-top: 80px;
    }

    .page-header h1 {
        font-size: 36px;
    }

    footer {
        padding: 40px 30px 20px;
    }
}

@media (max-width: 768px) {
    nav {
        padding: 15px 20px;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 40px 20px;
        gap: 30px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        border-top: 1px solid var(--border-color);
    }

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

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

    .nav-links a {
        display: block;
        padding: 15px 0;
        font-size: 18px;
        border-bottom: 1px solid var(--border-color);
    }

    .hamburger {
        display: flex;
    }

    .nav-right .cta-button {
        display: none;
    }

    .nav-links .mobile-cta {
        display: block;
        width: 90%;
        margin-top: 20px;
    }

    .container {
        padding: 0 20px;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .page-header p {
        font-size: 16px;
    }

    footer {
        padding: 40px 20px 20px;
        margin-top: 60px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .card {
        padding: 25px;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: 10px;
}

.mt-2 {
    margin-top: 20px;
}

.mt-3 {
    margin-top: 30px;
}

.mt-4 {
    margin-top: 40px;
}

.mt-5 {
    margin-top: 50px;
}

.mb-1 {
    margin-bottom: 10px;
}

.mb-2 {
    margin-bottom: 20px;
}

.mb-3 {
    margin-bottom: 30px;
}

.mb-4 {
    margin-bottom: 40px;
}

.mb-5 {
    margin-bottom: 50px;
}

.p-1 {
    padding: 10px;
}

.p-2 {
    padding: 20px;
}

.p-3 {
    padding: 30px;
}

.p-4 {
    padding: 40px;
}

.p-5 {
    padding: 50px;
}

.gap-1 {
    gap: 10px;
}

.gap-2 {
    gap: 20px;
}

.gap-3 {
    gap: 30px;
}

.gap-4 {
    gap: 40px;
}

.gap-5 {
    gap: 50px;
}