/* CSS Variables */
:root {
    --primary: #007cba;
    --primary-hover: #005a87;
    --error: #c62828;
    --error-bg: #ffebee;
    --error-border: #ef9a9a;
    --success: #2e7d32;
    --success-bg: #e8f5e9;
    --success-border: #a5d6a7;
    --warning: #e65100;
    --warning-bg: #fff3e0;
    --sidebar-bg: #1a1a2e;
    --sidebar-hover: #2a2a4e;
    --text-primary: #333;
    --text-secondary: #666;
    --text-muted: #999;
    --border-color: #ddd;
    --bg-light: #f5f5f5;
    --bg-white: white;
    --shadow: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-light);
    min-height: 100vh;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Common Form Elements */
.form-group {
    margin-bottom: 16px;
}

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

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

.btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* Error Message */
.error-message {
    background: var(--error-bg);
    color: var(--error);
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

/* Toaster Animation */
@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}