/* ============================================
   Patient Education Portal - Styles
   ============================================ */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #7c3aed;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   Screens
   ============================================ */

.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* ============================================
   Login Screen
   ============================================ */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.login-card {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 420px;
}

.logo {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.logo .subtitle {
    color: var(--gray-500);
    font-size: 0.9rem;
}

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

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.input-group input,
.input-group textarea,
.input-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s;
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-group textarea {
    min-height: 100px;
    resize: vertical;
}

.error-msg {
    display: block;
    color: var(--error);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.admin-link {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.admin-link a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.admin-link a:hover {
    text-decoration: underline;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    width: 100%;
}

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

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

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

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

.btn-success:hover {
    background: #059669;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-icon {
    padding: 0.5rem;
    min-width: 2.5rem;
}

/* ============================================
   Portal Header
   ============================================ */

.portal-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.portal-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

/* ============================================
   Portal Main
   ============================================ */

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

.welcome-section {
    text-align: center;
    padding: 3rem 1rem;
    margin-bottom: 2rem;
}

.welcome-section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.welcome-section p {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.modules-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
}

/* ============================================
   Modules Grid
   ============================================ */

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

.module-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all 0.2s;
    cursor: pointer;
}

.module-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.module-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--gray-100);
}

.module-image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--gray-300);
}

.module-info {
    padding: 1.5rem;
}

.module-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.module-info p {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.module-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.module-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* ============================================
   Modal
   ============================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    padding: 2rem;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
    position: relative;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gray-100);
    border: none;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    z-index: 10;
}

.modal-close:hover {
    background: var(--gray-200);
}

#module-content {
    padding: 2rem;
}

#module-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

#module-content img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

#module-content .module-body {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
}

#module-content .module-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 1.5rem 0 0.75rem;
}

#module-content .module-body p {
    margin-bottom: 1rem;
}

#module-content .module-body ul,
#module-content .module-body ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

#module-content .module-body li {
    margin-bottom: 0.5rem;
}

/* ============================================
   Footer
   ============================================ */

.portal-footer {
    text-align: center;
    padding: 2rem;
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ============================================
   Admin Styles
   ============================================ */

.admin-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

.admin-sidebar {
    background: var(--gray-900);
    color: var(--white);
    padding: 1.5rem;
}

.admin-sidebar h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-700);
}

.admin-nav {
    list-style: none;
}

.admin-nav li {
    margin-bottom: 0.5rem;
}

.admin-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--gray-300);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: var(--gray-800);
    color: var(--white);
}

.admin-main {
    padding: 2rem;
    overflow-y: auto;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.admin-actions {
    display: flex;
    gap: 0.75rem;
}

.admin-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.admin-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--gray-100);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Module List */
.module-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.module-list-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.module-list-item img {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.module-list-item .placeholder-thumb {
    width: 80px;
    height: 60px;
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
}

.module-list-info {
    flex: 1;
}

.module-list-info h4 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.module-list-info p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.module-list-actions {
    display: flex;
    gap: 0.5rem;
}

/* Editor */
.editor-section {
    margin-bottom: 1.5rem;
}

.editor-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.75rem;
}

.rich-editor {
    min-height: 300px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 1rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--gray-900);
    color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: toastIn 0.3s ease;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--error);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }
    
    .admin-sidebar {
        display: none;
    }
    
    .modules-grid {
        grid-template-columns: 1fr;
    }
    
    .login-card {
        padding: 2rem;
    }
    
    .portal-main {
        padding: 1rem;
    }
    
    .welcome-section h2 {
        font-size: 1.5rem;
    }
}