/* styles.css */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --text-color: #e0e0e0;
    --text-secondary: #a0a0a0;
    --background-color: #1a1a2e;
    --surface-color: #16213e;
    --border-color: #2d3748;
    --success-color: #48bb78;
    --error-color: #f56565;
    --warning-color: #ed8936;
    --info-color: #4299e1;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.light-mode {
    --primary-color: #3b82f6;
    --secondary-color: #2563eb;
    --accent-color: #0ea5e9;
    --text-color: #1f2937;
    --text-secondary: #4b5563;
    --background-color: #f9fafb;
    --surface-color: #ffffff;
    --border-color: #e5e7eb;
}

header {
    background-color: var(--surface-color);
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 600;
}

nav {
    background-color: var(--surface-color);
    padding: 0.5rem 2rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
}

.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: flex-start;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.2s ease;
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

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

.login-section {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
    max-width: 450px;
}

.login-section h2 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

.login-button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.login-button:hover {
    background-color: var(--secondary-color);
}

.login-button:active {
    transform: translateY(1px);
}

footer {
    background-color: var(--surface-color);
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Toggle switch for light/dark mode */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle input {
    display: none;
}

.theme-toggle label {
    display: block;
    width: 50px;
    height: 24px;
    background-color: var(--border-color);
    border-radius: 24px;
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s ease;
}

.theme-toggle input:checked + label {
    background-color: var(--primary-color);
}

.theme-toggle span {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transition: left 0.3s ease;
}

.theme-toggle input:checked + label span {
    left: 28px;
}

/* Responsive design */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }

    .content {
        padding: 1rem;
    }

    .login-section {
        margin-top: 1rem;
        padding: 1.5rem;
    }
}