/* =================================== */
/* CSS VARIABLES */
/* =================================== */
:root {
    /* Colors */
    --primary-color: #3aa3a0;
    --primary-dark: #2f8a87;
    --secondary-color: #f6c324;
    --secondary-dark: #e0b020;
    --dark-bg: #2c3e50;
    --text-primary: #333;
    --text-secondary: #555;
    --text-tertiary: #666;
    --background: #f4f7f6;
    --white: #ffffff;
    --border-color: #ccc;
    --border-light: #e0e0e0;
    
    /* Feedback Colors */
    --success-bg: #d4edda;
    --success-border: #c3e6cb;
    --success-text: #155724;
    --error-bg: #fde8e8;    
    --error-border: #f5c6cb; 
    --error-text: #9d1c24;
    --info-bg: #d1ecf1;
    --info-border: #bee5eb;
    --info-text: #0c5460;
    --warning-bg: #fff3cd;
    --warning-border: #ffeeba;
    --warning-text: #856404;
    
    /* Spacing & Layout */
    --header-height: 80px;
    --max-width: 1200px;
    --max-width-md: 900px;
    --max-width-sm: 800px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.2);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-elevated: 0 6px 16px rgba(0, 0, 0, 0.1);
    --shadow-focus: 0 0 0 2px rgba(58, 163, 160, 0.2);
    
    /* Transitions */
    --transition-fast: 0.1s ease-in-out;
    --transition-normal: 0.2s ease-in-out;
}

/* =================================== */
/* BASE STYLES */
/* =================================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: var(--header-height) 0 0 0;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* =================================== */
/* HEADER & NAVIGATION */
/* =================================== */
.site-header {
    background-color: var(--white);
    padding: 10px 40px;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
}

.navbar-brand img {
    height: 50px;
    width: auto;
    vertical-align: middle;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 5px;
    font-weight: 500;
    transition: color var(--transition-normal);
    white-space: nowrap;
}

.navbar-links a:hover {
    color: var(--primary-color);
}

.navbar-welcome-text {
    color: var(--text-secondary);
    font-weight: 500;
    margin: 0 10px;
    white-space: nowrap;
}

/* =================================== */
/* COMPONENTS: BUTTONS */
/* =================================== */
.btn {
    display: inline-block;
    padding: 12px 25px;
    border: 1px solid transparent;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background-color var(--transition-normal), transform var(--transition-fast), border-color var(--transition-normal);
}

.btn:active {
    transform: translateY(1px);
}

.btn:disabled, button.btn[disabled] {
    background-color: #e9ecef;
    border-color: #dee2e6;
    color: #6c757d;
    cursor: not-allowed;
    pointer-events: none;
    opacity: 0.65;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border-color: var(--secondary-color);
}
.btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--text-primary);
    text-decoration: none;
}

/* Logout Button (Yellow Background / Black Text) */
.btn-logout {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border-color: var(--secondary-color);
}
.btn-logout:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--text-primary);
}

/* Specific Button Types found in multiple files */
.btn-delete {
    background-color: #f8f9fa;
    border-color: #dee2e6;
    color: #495057;
}
.btn-delete:hover {
    background-color: #e53935;
    border-color: #d32f2f;
    color: var(--white);
}

.btn-danger {
    background-color: #dc3545;
    color: var(--white);
    border-color: #dc3545;
}
.btn-danger:hover {
    background-color: #bb2d3b;
    border-color: #b02a37;
    color: var(--white);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Google Button (Used in Login and Admin Login) */
.btn-google {
    display: block;
    width: 100%;
    padding: 12px;
    text-align: center;
    text-decoration: none;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 5px;
    background-color: #4285F4;
    color: white;
    transition: background-color 0.3s;
    box-sizing: border-box;
}
.btn-google:hover {
    background-color: #357ae8;
}

/* Navigation Back Button (Used in Dashboards) */
.btn-nav-back {
    background-color: transparent;
    border: 2px solid rgba(0, 0, 0, 0.1);
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.btn-nav-back:hover {
    border-color: var(--text-secondary);
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
    text-decoration: none;
}

/* High Contrast Action Button (Dashboards/Question Bank) */
.btn-action-pop {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border: 2px solid var(--secondary-color);
    padding: 10px 24px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-action-pop:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
    text-decoration: none;
}

/* =================================== */
/* COMPONENTS: FORMS & INPUTS */
/* =================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-control, 
input[type="text"], 
input[type="email"], 
input[type="password"], 
input[type="tel"], 
input[type="number"],
input[type="date"],
select, 
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    color: var(--text-primary);
    box-sizing: border-box;
    background-color: var(--white);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.form-control:focus, 
input:focus, 
select:focus, 
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-focus);
}

textarea {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

/* File Input Custom Wrapper */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 10px;
}
.file-input-wrapper input[type="file"] {
    opacity: 0;
    position: absolute;
    width: 0.1px;
    height: 0.1px;
    overflow: hidden;
    z-index: -1;
}
.file-input-label {
    padding: 8px 15px;
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 600;
}
.file-input-label:hover {
    background-color: var(--secondary-dark);
}
.file-name {
    display: inline-block;
    vertical-align: middle;
    margin-left: 10px;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* =================================== */
/* COMPONENTS: CARDS & CONTAINERS */
/* =================================== */
.card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    margin-bottom: 30px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 20px;
}

.small-container {
    max-width: var(--max-width-sm);
    margin: 0 auto;
}

/* =================================== */
/* MESSAGES & ALERTS */
/* =================================== */
.messages-container {
    max-width: var(--max-width);
    margin: 20px auto;
    padding: 0 20px;
}

.alert, .message {
    padding: 15px 20px;
    margin-bottom: 15px;
    border: 1px solid transparent;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
}

.alert-success, .message.success {
    color: var(--success-text);
    background-color: var(--success-bg);
    border-color: var(--success-border);
}

.alert-error, .alert-danger, .message.error {
    color: var(--error-text);
    background-color: var(--error-bg);
    border-color: var(--error-border);
}

.alert-info, .message.info {
    color: var(--info-text);
    background-color: var(--info-bg);
    border-color: var(--info-border);
}

.alert-warning, .message.warning {
    color: var(--warning-text);
    background-color: var(--warning-bg);
    border-color: var(--warning-border);
}

/* Standard Error List (Form Validation) */
.error-list {
    list-style: none;
    padding: 10px 15px;
    margin: 5px 0 15px 0;
    background-color: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-border);
    border-radius: 5px;
    font-size: 0.9em;
}
.error-list ul { margin: 0; padding: 0; list-style: none; }
.error-list li { margin: 0; padding: 0; }

/* =================================== */
/* FOOTER */
/* =================================== */
.site-footer {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: 50px 20px;
    text-align: center;
}

.footer-container {
    max-width: var(--max-width-sm);
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--secondary-color);
    margin-top: 0;
    margin-bottom: 25px;
}

.contact-info p { margin: 10px 0; }

.contact-info a {
    color: var(--white);
    text-decoration: none;
    font-size: 1.1rem;
    transition: color var(--transition-normal);
}
.contact-info a:hover { color: var(--secondary-color); }

.copyright {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #4a627a;
}
.copyright p {
    margin: 0;
    color: #bdc3c7;
    font-size: 0.9rem;
}

/* =================================== */
/* ACCESS RESTRICTION (BARRED) */
/* =================================== */
.barred-container {
    position: relative;
}
.barred-container.is-barred .barred-content {
    opacity: 0.2;
    pointer-events: none;
    filter: grayscale(90%);
    -webkit-filter: grayscale(90%);
    user-select: none;
}
.barred-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 8px;
}
.barred-message-box {
    background-color: white;
    padding: 25px 35px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    text-align: center;
    max-width: 90%;
    width: 500px;
    border: 1px solid #ddd;
}
.barred-message-box h3 { margin-top: 0; color: #b92c2c; }
.barred-message-box p { margin-bottom: 20px; }

/* =================================== */
/* UTILITIES & RESPONSIVE */
/* =================================== */
.d-inline { display: inline; }

@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 15px; }
    .navbar-links { margin-top: 10px; align-items: center; }
    .site-header { padding: 10px 20px; }
}