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

:root {
    --primary-color: #e50914;
    --primary-dark: #b20710;
    --secondary-color: #564d4d;
    --bg-dark: #141414;
    --bg-card: #1f1f1f;
    --bg-input: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --border-color: #333333;
    --success-color: #46d369;
    --error-color: #e50914;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-primary);
}

.container {
    width: 100%;
    max-width: 500px;
}

.main-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    font-size: 3em;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #ff6b6b, #ee5a6f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo p {
    color: var(--text-secondary);
    font-size: 1.1em;
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 15px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: bold;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

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

.form-group input {
    width: 100%;
    padding: 15px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1em;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #333333;
}

.form-group textarea {
    width: 100%;
    padding: 15px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1em;
    transition: all 0.3s;
    resize: vertical;
    font-family: inherit;
    min-height: 80px;
}

.btn {
    width: 100%;
    padding: 15px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(229, 9, 20, 0.4);
}

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

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

.loading {
    text-align: center;
    padding: 20px;
}

.loading.hidden {
    display: none;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-message {
    background: rgba(229, 9, 20, 0.2);
    border: 2px solid var(--error-color);
    color: var(--error-color);
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: center;
}

.error-message.hidden {
    display: none;
}

.success-message {
    background: rgba(70, 211, 105, 0.2);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: center;
}

.success-message.hidden {
    display: none;
}

@media (max-width: 600px) {
    .main-card {
        padding: 30px 20px;
    }
    
    .logo h1 {
        font-size: 2.5em;
    }
}