:root {
    --transition-speed: 0.4s;
}

[data-theme="dark"] {
    --bg-primary: #0a0a1a;
    --bg-card: rgba(15, 15, 46, 0.7);
    --text-primary: #e0e0ff;
    --text-secondary: #8888bb;
    --accent-1: #00d4ff;
    --accent-2: #7b2fff;
    --accent-gradient: linear-gradient(135deg, #00d4ff, #7b2fff, #ff2d95);
    --border-color: rgba(100, 100, 200, 0.15);
    --input-bg: rgba(15, 15, 46, 0.8);
    --glow-1: rgba(0, 213, 255, 0.253);
    --particle-color: rgba(0, 213, 255, 0.205);
}

[data-theme="light"] {
    --bg-primary: #f0f2ff;
    --bg-card: rgba(255, 255, 255, 0.8);
    --text-primary: #1a1a3e;
    --text-secondary: #4a4a7a;
    --accent-1: #0088cc;
    --accent-2: #6b1fff;
    --accent-gradient: linear-gradient(135deg, #0088cc, #6b1fff, #e0006f);
    --border-color: rgba(100, 100, 200, 0.2);
    --input-bg: rgba(255, 255, 255, 0.9);
    --glow-1: rgba(0, 136, 204, 0.2);
    --particle-color: rgba(107, 31, 255, 0.4);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow-x: hidden;
    overflow-y: auto;
    transition: background var(--transition-speed);
}

#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.cursor-glow {
    position: fixed;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--glow-1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 1;
    transition: opacity 0.3s;
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    left: 2rem;
    width: 50px;
    height: 50px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    backdrop-filter: blur(10px);
    transition: all var(--transition-speed);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--glow-1);
}

.toggle-ball {
    font-size: 1.5rem;
}

.register-container {
    position: relative;
    z-index: 10;
    width: 90%;
    max-width: 450px;
    animation: fadeInUp 0.8s ease;
}

.register-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem 2.5rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-speed);
}

.register-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.4);
}

.register-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.register-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-1);
    margin-bottom: 1.5rem;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--accent-1);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.4);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(0, 255, 136, 0);
    }
}

.register-title {
    font-size: 2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.register-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.input-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 0.9rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-speed);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px var(--glow-1);
}

.form-control::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-gradient);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--glow-1);
}

.btn:active {
    transform: translateY(0);
}

.login-link {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.login-link a {
    color: var(--accent-1);
    text-decoration: none;
    font-weight: 600;
}

.login-link a:hover {
    color: var(--accent-2);
}

.nav-logo {
    position: fixed;
    top: 2rem;
    right: 2rem;
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
    z-index: 100;
    text-decoration: none;
}

.nav-logo::after {
    content: '_';
    -webkit-text-fill-color: var(--accent-1);
    animation: blink 1s infinite;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

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

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

@media (max-width: 768px) {
    body {
        overflow-y: auto;
        overflow-x: hidden;
        align-items: flex-start;
        padding: 2rem 0;
    }

    .register-container {
        margin: 2rem auto;
    }

    .register-card {
        padding: 2rem 1.5rem;
    }

    .theme-toggle {
        top: 1rem;
        left: 1rem;
        width: 45px;
        height: 45px;
        position: fixed;
    }

    .nav-logo {
        top: 1rem;
        right: 1rem;
        position: fixed;
    }

    .cursor-glow {
        display: none;
    }

    #particles-canvas {
        opacity: 0.3;
    }

    .form-control {
        font-size: 16px;
        -webkit-appearance: none;
        appearance: none;
    }
}