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

:root {
    /* Light mode colors (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-nav: rgba(255, 255, 255, 0.95);
    --text-primary: #333333;
    --text-secondary: #141414;
    --text-muted: #666;
    --accent-color: #7630b7;
    --accent-dark: #5a1f8a;
    --border-color: rgba(118, 48, 183, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Dark mode colors */
    --bg-primary: #141414;
    --bg-secondary: #1a1a1a;
    --bg-card: rgba(26, 26, 26, 0.8);
    --bg-nav: rgba(20, 20, 20, 0.95);
    --text-primary: #e8e8e8;
    --text-secondary: #ffffff;
    --text-muted: #888;
    --accent-color: #7630b7;
    --accent-dark: #5a1f8a;
    --border-color: rgba(118, 48, 183, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
header {
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(118, 48, 183, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(118, 48, 183, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(118, 48, 183, 0.12) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%;
    position: relative;
    color: var(--text-secondary);
    padding: 100px 20px;
    text-align: center;
    overflow: hidden;
    transition: background 0.3s ease;
}

[data-theme="dark"] header {
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(118, 48, 183, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(118, 48, 183, 0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(118, 48, 183, 0.25) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, var(--text-secondary), transparent),
        radial-gradient(2px 2px at 60% 70%, var(--text-secondary), transparent),
        radial-gradient(1px 1px at 50% 50%, var(--text-secondary), transparent),
        radial-gradient(1px 1px at 80% 10%, var(--text-secondary), transparent),
        radial-gradient(2px 2px at 90% 40%, var(--text-secondary), transparent),
        radial-gradient(1px 1px at 33% 60%, var(--text-secondary), transparent),
        radial-gradient(2px 2px at 10% 80%, var(--text-secondary), transparent);
    background-size: 200% 200%, 200% 200%, 200% 200%, 200% 200%, 200% 200%, 200% 200%, 200% 200%;
    background-position: 0% 0%, 100% 0%, 0% 100%, 100% 100%, 50% 50%, 25% 75%, 75% 25%;
    opacity: 0.3;
    animation: twinkle 20s infinite;
}

[data-theme="dark"] header::before {
    opacity: 0.6;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.4; }
}

header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out;
    position: relative;
    z-index: 1;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

header p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out;
    position: relative;
    z-index: 1;
}

header .btn-primary {
    position: relative;
    z-index: 1;
}

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

/* Navigation */
nav {
    background: var(--bg-nav);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

.logo {
    width: auto;
    max-width: 300px;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

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

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

.nav-links a:hover {
    color: var(--accent-color);
    text-shadow: 0 0 8px rgba(118, 48, 183, 0.6);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 50%, var(--accent-color) 100%);
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(118, 48, 183, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(118, 48, 183, 0.6);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-right: 20px;
}

.theme-switch {
    position: relative;
    width: 50px;
    height: 26px;
    cursor: pointer;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    border-radius: 26px;
    transition: 0.3s;
}

.theme-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: 0.3s;
}

input:checked + .theme-slider {
    background-color: var(--accent-color);
}

input:checked + .theme-slider:before {
    transform: translateX(24px);
}

.theme-icon {
    font-size: 1.2rem;
}

/* Sections */
section {
    padding: 80px 20px;
}

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

/* Services */
#services {
    background: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-secondary);
    text-shadow: 0 0 10px rgba(118, 48, 183, 0.3);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px var(--shadow-color);
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s, background-color 0.3s;
    color: var(--text-primary);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(118, 48, 183, 0.4);
    border-color: rgba(118, 48, 183, 0.5);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 5px rgba(118, 48, 183, 0.5));
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--accent-color);
    text-shadow: 0 0 8px rgba(118, 48, 183, 0.4);
}

/* About */
#about {
    background: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-secondary);
    text-shadow: 0 0 10px rgba(118, 48, 183, 0.3);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 50%, var(--accent-color) 100%);
    color: white;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(118, 48, 183, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 10px;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* Contact Form */
#contact {
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(118, 48, 183, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(118, 48, 183, 0.15) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-secondary);
    transition: background 0.3s ease;
}

[data-theme="dark"] #contact {
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(118, 48, 183, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(118, 48, 183, 0.3) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 12px;
    color: var(--text-primary);
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.contact-form h2 {
    color: var(--text-secondary);
    text-shadow: 0 0 10px rgba(118, 48, 183, 0.4);
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-primary);
    transition: border-color 0.3s, box-shadow 0.3s, background-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(118, 48, 183, 0.3);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

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

.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 50%, var(--accent-color) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(118, 48, 183, 0.4);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(118, 48, 183, 0.6);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info h2 {
    margin-bottom: 30px;
}

.info-item {
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.info-icon {
    font-size: 2rem;
}

/* Footer */
footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 40px 20px;
    text-align: center;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    .nav-links {
        display: none;
    }

    .logo {
        max-width: 150px;
    }

    .theme-toggle {
        margin-right: 10px;
    }

    .theme-icon {
        font-size: 1rem;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

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

/* Benefits Section */
.benefits-list {
    list-style: none;
    margin-top: 30px;
}

.benefits-list li {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-primary);
}

.benefits-list li:last-child {
    border-bottom: none;
}

.check-icon {
    color: var(--accent-color);
    font-size: 1.5rem;
    text-shadow: 0 0 8px rgba(118, 48, 183, 0.6);
}