:root {
    --primary-color: #4a90e2;
    --secondary-color: #f39c12;
    --bg-dark: #121212;
    --card-bg: #1e1e1e;
    --text-main: #e0e0e0;
    --text-muted: #b0b0b0;
    --border-color: #333333;
    --success: #2ecc71;
    --error: #e74c3c;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Auth Pages (Login/Register) */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

.auth-card h2 {
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: #252525;
    color: white;
    outline: none;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
}

.btn {
    width: 100%;
    padding: 0.9rem;
    border: none;
    border-radius: 8px;
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, background 0.3s;
}

.btn:hover {
    background: #357abd;
}

.btn:active {
    transform: scale(0.98);
}

.auth-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Dashboard Styles */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.nav h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: white;
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.note-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    position: relative;
}

.note-card h3 {
    margin-bottom: 0.8rem;
    color: var(--primary-color);
}

.note-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    white-space: pre-wrap;
}

.note-actions {
    margin-top: 1rem;
    display: flex;
    justify-content: flex-end;
}

.btn-delete {
    background: transparent;
    border: 1px solid var(--error);
    color: var(--error);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
}

.btn-delete:hover {
    background: var(--error);
    color: white;
}

/* Alert Messages */
.alert {
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

.alert-success {
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}