:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    }

    [data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    }

    * {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    }

    body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    }

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

    .gradient-text {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    }

    .card {
    background: var(--bg-secondary);
    border: 1px solid rgba(148, 163, 184, 0.1);
    backdrop-filter: blur(10px);
    }

    .skill-bar {
    background: linear-gradient(90deg, var(--accent), #8b5cf6);
    height: 8px;
    border-radius: 4px;
    transform-origin: left;
    animation: fillBar 2s ease-out forwards;
    }

    @keyframes fillBar {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
    }

    .fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
    }

    .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
    }

    .slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease;
    }

    .slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
    }

    .slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease;
    }

    .slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
    }

    .floating {
    animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    }

    .typewriter {
    overflow: hidden;
    border-right: 2px solid var(--accent);
    white-space: nowrap;
    animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
    }

    @keyframes typing {
    from { width: 0; }
    to { width: 100%; }
    }

    @keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--accent); }
    }

    .nav-blur {
    backdrop-filter: blur(10px);
    background: rgba(15, 23, 42, 0.8);
    }

    [data-theme="light"] .nav-blur {
    background: rgba(255, 255, 255, 0.8);
    }

    .project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }

    .project-card:hover .project-image {
    transform: scale(1.05);
    }

    .project-image {
    transition: transform 0.3s ease;
    }

    .toggle-switch {
    position: relative;
    width: 60px;
    height: 30px;
    background: var(--text-secondary);
    border-radius: 15px;
    cursor: pointer;
    transition: background 0.3s;
    }

    .toggle-switch::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
    }

    .toggle-switch.active {
    background: var(--accent);
    }

    .toggle-switch.active::before {
    transform: translateX(30px);
    }

    .contact-form input:focus,
    .contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }

    #themeToggle.active .theme-thumb {
    transform: translateX(24px); 
}