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

:root {
    --bg: #ffffff;
    --bg-gradient-start: #f8f9fa;
    --bg-gradient-end: #e9ecef;
    --text: #212529;
    --text-secondary: #6c757d;
    --accent-pink: #EC4899;
    --accent-purple: #8B5CF6;
    --accent-blue: #6B9FFF;
    --border: #dee2e6;
    --tag-bg: rgba(107, 159, 255, 0.1);
    --tag-border: rgba(107, 159, 255, 0.3);
    --footer-text: #adb5bd;
}

[data-theme="dark"] {
    --bg: #1a0f2e;
    --bg-gradient-start: #1a0f2e;
    --bg-gradient-end: #2a1f3d;
    --text: #E8E4ED;
    --text-secondary: #B8B0C4;
    --border: #3d2f52;
    --tag-bg: rgba(107, 159, 255, 0.1);
    --tag-border: rgba(107, 159, 255, 0.3);
    --footer-text: #3d2f52;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    text-align: center;
    max-width: 500px;
    position: relative;
}

.logo {
    width: 180px;
    height: 180px;
    margin: 0 auto 40px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

h1 {
    font-size: 72px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-pink) 0%, var(--accent-purple) 50%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

p {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 40px;
}

.tags {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    color: var(--accent-blue);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.beta-badge {
    background: linear-gradient(135deg, var(--accent-pink) 0%, var(--accent-purple) 100%);
    color: white;
    border: none;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text);
    padding: 0;
    margin-left: 12px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    vertical-align: middle;
}

.theme-toggle:hover {
    transform: scale(1.2);
}

.theme-toggle:active {
    transform: scale(0.9);
}

.auth-box {
    max-width: 320px;
    margin: 0 auto 30px;
    padding: 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.auth-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 12px;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: border-color 0.2s ease;
}

.auth-input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.auth-input::placeholder {
    color: var(--text-secondary);
}

.auth-button {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-pink) 0%, var(--accent-purple) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.auth-button:hover:not(:disabled) {
    transform: translateY(-1px);
}

.auth-button:active:not(:disabled) {
    transform: translateY(0);
}

.auth-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.auth-button-secondary {
    width: 100%;
    padding: 12px 16px;
    margin-top: 8px;
    font-size: 14px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.auth-button-secondary:hover {
    border-color: var(--accent-blue);
    color: var(--text);
}

.status-message {
    display: none;
    padding: 12px;
    margin-top: 12px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
}

.status-message.success {
    background: rgba(107, 159, 255, 0.1);
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
}

.status-message.error {
    background: rgba(236, 72, 153, 0.1);
    border: 1px solid var(--accent-pink);
    color: var(--accent-pink);
}

.footer {
    position: absolute;
    bottom: 20px;
    font-size: 12px;
    color: var(--footer-text);
    display: flex;
    align-items: center;
    gap: 4px;
}

.back-link {
    display: inline-block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 20px;
    font-size: 14px;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--text);
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.auth-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 600px) {
    h1 {
        font-size: 48px;
    }

    .logo {
        width: 140px;
        height: 140px;
    }

    p {
        font-size: 18px;
    }

    .theme-toggle {
        font-size: 14px;
    }
}