:root {
    
    /* Light theme */
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --card-bg: #f8f9fa;
    --border-color: #dee2e6;
    --nav-bg: var(--color-primary);
    --nav-text: #ffffff;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --card-bg: #2d2d2d;
    --border-color: #404040;
    --nav-bg: #0d1117;
    --nav-text: #e0e0e0;
}

html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Landing page styles */
.landing-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.landing-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    max-width: 600px;
    width: 100%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.landing-title {
    color: var(--color-primary);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.landing-subtitle {
    color: var(--text-color);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn-signin {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border: none;
    padding: 0.75rem 2.5rem;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-weight: 500;
}

.btn-signin:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 119, 141, 0.3);
    color: white;
}

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

/* Theme toggle button */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    z-index: 1000;
}

.theme-toggle:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Navigation styles */
.navbar-dark {
    background-color: var(--nav-bg) !important;
}

.sidebar {
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.top-row {
    background-color: var(--card-bg);
    //border-bottom: 1px solid var(--border-color);
}

.top-row a {
    color: var(--color-primary);
    text-decoration: none;
}

.top-row a:hover {
    color: var(--color-secondary);
}

/* Signed in page styles */
.dashboard-container {
    padding: 2rem;
}

.welcome-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-on-surface);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.user-info {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.info-label {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.btn-signout {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

    .btn-signout:hover {
        opacity: 0.9;
        color: var(--color-secondary);
    }

/* Override some Bootstrap defaults */
a, .btn-link {
    color: var(--color-primary);
}

a:hover, .btn-link:hover {
    color: var(--color-secondary);
}

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

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