:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --input-bg: #0f172a;
    --border-color: #334155;
    --error-color: #ef4444;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.login-header {
    margin-bottom: 24px;
    text-align: center;
}

.login-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: var(--accent);
}

input.invalid {
    border-color: var(--error-color);
}

.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.toggle-btn {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.eye-icon {
    width: 20px;
    height: 20px;
}

.hidden {
    display: none !important;
}

.error-msg {
    display: block;
    color: var(--error-color);
    font-size: 0.75rem;
    margin-top: 4px;
    min-height: 16px;
}

.form-options {
    margin-bottom: 24px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-btn:hover {
    background-color: var(--accent-hover);
}