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

body.login-page {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 32px;
    text-align: center;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 8px;
}

.login-header p {
    opacity: 0.9;
    font-size: 14px;
}

.tabs {
    display: flex;
    border-bottom: 1px solid #e2e8f0;
}

.tab {
    flex: 1;
    padding: 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: #64748b;
    transition: all 0.3s;
    position: relative;
}

.tab:hover {
    color: #667eea;
}

.tab.active {
    color: #667eea;
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: #667eea;
}

.tab-content {
    display: none;
    padding: 32px;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #334155;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

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

.telegram-info {
    text-align: center;
    padding: 20px;
    background: #f8fafc;
    border-radius: 8px;
    margin-bottom: 20px;
}

.telegram-info p {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 16px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-danger {
    background: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-success {
    background: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}

.text-danger {
    color: #c33;
    font-size: 13px;
    margin-top: 4px;
    display: block;
}