/* Main CSS - Base Styles and Variables */

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

:root {
    /* Light theme colors (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent-primary: #6366f1;
    --accent-secondary: #4f46e5;
    --accent-hover: #4338ca;
    --border-color: #e0e0e0;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    /* Dark theme colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #888888;
    --accent-primary: #6366f1;
    --accent-secondary: #4f46e5;
    --accent-hover: #4338ca;
    --border-color: #333333;
}

body {
    font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Full Screen Sections */
.full-screen-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 5%;
    position: relative;
    width: 100%;
    box-sizing: border-box;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 70px;
    width: 100%;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    color: var(--text-primary);
    margin-bottom: 15px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 15px 35px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-primary);
}

.btn-outline:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

/* Main Content */
.main-content {
    width: 100%;
    padding: 0;
    margin: 0;
    overflow-x: hidden;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        padding: 0 4%;
    }
    
    .full-screen-section {
        padding: 80px 4%;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 968px) {
    .container {
        padding: 0 3%;
    }

    .full-screen-section {
        padding: 70px 3%;
    }

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

    .section-subtitle {
        font-size: 0.85rem;
        letter-spacing: 2px;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 4%;
    }
    
    .full-screen-section {
        padding: 60px 4%;
    }

    .section-title {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 0.75rem;
        letter-spacing: 2px;
    }
}