/*
 * App name: Quantum Computing Simulation
 * Description: Main stylesheet - desktop-focused with CSS variables,
 *              collapsible sidebar, dark theme, responsive tables.
 */

/* ===========================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   =========================================== */
:root {
    /* Colors - Primary */
    --color-primary: #455c9a;
    --color-primary-dark: #374151;
    --color-primary-light: #5a7bc4;
    
    /* Colors - Background */
    --color-bg-dark: #1a1a2e;
    --color-bg-darker: #0d0d1a;
    --color-bg-card: #2a2a4a;
    --color-bg-input: #333344;
    --color-bg-table-header: #2c3e50;
    --color-bg-table-hover: #e6f7ff;
    
    /* Colors - Text */
    --color-text-primary: #ffffff;
    --color-text-secondary: #e0e0e0;
    --color-text-muted: #9ca3af;
    --color-text-dark: #000000;
    
    /* Colors - Accent */
    --color-accent-blue: #4a90d9;
    --color-accent-blue-light: #6bb3f0;
    --color-accent-red: #d94a4a;
    --color-accent-red-light: #f87171;
    --color-accent-green: #4ade80;
    --color-accent-green-light: #6ee7a0;
    --color-accent-yellow: #f59e0b;
    --color-accent-cyan: #87ceeb;
    
    /* Colors - Status */
    --color-error: #b91c1c;
    --color-error-text: #fca5a5;
    --color-success: #4ade80;
    --color-warning: #f59e0b;
    
    /* Colors - Borders */
    --color-border: #333355;
    --color-border-light: #444;
    --color-border-input: #ccc;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.85rem;
    --font-size-base: 0.95rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.1rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
    
    /* Layout */
    --sidebar-width: 150px;
    --sidebar-collapsed-width: 50px;
    
    /* Z-Index Layers */
    --z-sidebar: 100;
    --z-modal: 1000;
    --z-floating: 9999;
}

/* ===========================================
   BASE RESET & DEFAULTS
   =========================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    padding: 0;
    background-image: url("../images/wallpaper.png");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
    color: var(--color-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.5;
    min-height: 100vh;
}

/* ===========================================
   TYPOGRAPHY
   =========================================== */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }
h4 { font-size: var(--font-size-md); }

p {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

/* ===========================================
   LINKS
   =========================================== */
a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-red-light);
}

/* ===========================================
   LAYOUT - MAIN STRUCTURE
   =========================================== */
.layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-slow);
}

.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

.main-header {
    margin-bottom: var(--spacing-md);
}

.main-header h1 {
    margin: 0;
}

main {
    width: 100%;
}

/* ===========================================
   SIDEBAR
   =========================================== */

/* Disable transitions on page load to prevent animation glitch */
.no-transitions .sidebar,
.no-transitions .sidebar *,
.no-transitions .main-content {
    transition: none !important;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--color-primary);
    color: var(--color-text-secondary);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md) var(--spacing-xs);
    z-index: var(--z-sidebar);
    transition: width var(--transition-slow);
    overflow: hidden;
}

.sidebar-collapsed .sidebar {
    width: var(--sidebar-collapsed-width);
    overflow: visible;
}

/* Sidebar Header */
.sidebar-header {
    padding: 0 var(--spacing-sm) var(--spacing-lg) var(--spacing-sm);
    border-bottom: 1px solid var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 50px;
}

.sidebar-logo-link {
    display: block;
    flex: 1;
    overflow: hidden;
    transition: opacity var(--transition-base);
}

.sidebar-collapsed .sidebar-logo-link {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

.sidebar-logo-img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    transition: color var(--transition-fast);
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    color: var(--color-text-primary);
    background: none;
}

.sidebar-toggle i {
    transition: transform var(--transition-slow);
}

.sidebar-collapsed .sidebar-toggle i {
    transform: rotate(180deg);
}

/* Sidebar Navigation */
.sidebar nav {
    overflow: visible;
}

.sidebar-nav {
    list-style: none;
    padding: var(--spacing-sm) 0 0;
    margin: 0;
    flex: 1;
    overflow: visible;
}

.sidebar-nav li {
    margin-bottom: var(--spacing-xs);
    overflow: visible;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-xs);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-nav a i {
    width: 1.25rem;
    text-align: center;
    font-size: var(--font-size-md);
    flex-shrink: 0;
}

.sidebar-nav a span {
    transition: opacity var(--transition-base), width var(--transition-base);
}

.sidebar-collapsed .sidebar-nav a span {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background-color: var(--color-primary-dark);
    color: var(--color-text-primary);
}

/* Tooltip for collapsed sidebar */
.sidebar-collapsed .sidebar-nav a {
    position: relative;
    overflow: visible;
}

.sidebar-collapsed .sidebar-nav a::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 10px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    z-index: 1000;
    pointer-events: none;
}

.sidebar-collapsed .sidebar-nav a:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Sidebar Action Buttons */
.sidebar-actions {
    margin-top: var(--spacing-md);
    padding: 0 var(--spacing-xs);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    overflow: visible;
}

.sidebar-action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-xs);
    border-radius: var(--radius-md);
    background-color: transparent;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    overflow: hidden;
    text-decoration: none;
}

.sidebar-action-btn i {
    width: 1.25rem;
    text-align: center;
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

.sidebar-action-btn span {
    transition: opacity var(--transition-base), width var(--transition-base);
}

.sidebar-collapsed .sidebar-action-btn span {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Tooltip for collapsed sidebar action buttons */
.sidebar-collapsed .sidebar-action-btn {
    position: relative;
    overflow: visible;
}

.sidebar-collapsed .sidebar-action-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 10px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    z-index: 1000;
    pointer-events: none;
}

.sidebar-collapsed .sidebar-action-btn:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Reset Button */
.btn-reset {
    border: 1px solid var(--color-error);
    color: var(--color-error-text);
}

.btn-reset i {
    color: var(--color-accent-red-light);
}

.btn-reset:hover {
    background-color: var(--color-error);
    color: var(--color-text-primary);
    border-color: var(--color-error);
}

.btn-reset:hover i {
    color: var(--color-text-primary);
}

/* Sidebar Footer */
.sidebar-footer {
    margin-top: auto;
    padding: var(--spacing-md) var(--spacing-sm);
    border-top: 1px solid var(--color-primary-dark);
    text-align: center;
    transition: opacity var(--transition-base);
}

.sidebar-footer p {
    margin: 0;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.sidebar-collapsed .sidebar-footer {
    opacity: 0;
    pointer-events: none;
}

/* ===========================================
   BUTTONS - GENERAL
   =========================================== */
button {
    font-family: inherit;
    font-size: var(--font-size-sm);
    cursor: pointer;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-bg-card);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

button:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-border-light);
    color: var(--color-text-primary);
}

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

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

.btn-secondary {
    background-color: #4b5563;
    border-color: #4b5563;
    color: var(--color-text-primary);
}

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

.btn-warning {
    background-color: var(--color-warning);
    border-color: var(--color-warning);
    color: var(--color-text-dark);
}

.btn-warning:hover {
    background-color: #d97706;
}

/* ===========================================
   FORMS
   =========================================== */
form {
    display: inline-block;
    width: fit-content;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border-input);
}

label {
    color: var(--color-text-muted);
}

input, select, textarea {
    font-family: inherit;
    font-size: var(--font-size-sm);
    background-color: var(--color-bg-input);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-accent-blue);
}

select {
    cursor: pointer;
}

.form-error-msg {
    color: var(--color-accent-red-light);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* Shot Filter Form */
.shot-filter {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 400px;
    margin: var(--spacing-lg) 0;
    border: none;
    padding: 0;
}

.shot-filter select {
    flex: 1;
    text-align: center;
}

/* ===========================================
   TABLES
   =========================================== */
.table-container {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: var(--spacing-lg) 0;
    overflow: hidden;
}

.table-scroll-wrapper {
    overflow-x: auto;
}

/* Gradient indicator for horizontal scroll */
.table-container::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 30px;
    background: linear-gradient(to right, transparent, rgba(26, 26, 46, 0.9));
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.table-container.has-scroll::after {
    opacity: 1;
}

.table-container.scrolled-end::after {
    opacity: 0;
}

table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
    table-layout: fixed;
}

table caption {
    text-align: left;
    margin-bottom: var(--spacing-sm);
}

table caption h3 {
    margin: 0;
}

table th,
table td {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    text-align: center;
}

table th {
    background-color: var(--color-bg-table-header);
    color: var(--color-text-primary);
    font-weight: 600;
    letter-spacing: 0.03em;
    position: relative;
}

table tbody tr {
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

table tbody tr:hover {
    background-color: var(--color-bg-table-hover);
    color: var(--color-text-dark);
}

/* Sticky First Column */
table th:first-child,
table td:first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    background-color: inherit;
}

table th:first-child {
    background-color: var(--color-bg-table-header);
    z-index: 3;
}

table tbody tr:hover td:first-child {
    background-color: var(--color-bg-table-hover);
}

/* Actions Column */
.actions-col {
    width: 120px;
}

.actions-cell {
    text-align: center;
    vertical-align: middle;
    padding: var(--spacing-xs) var(--spacing-sm);
    white-space: nowrap;
}

.actions-cell button {
    margin: 0 2px;
    min-width: 50px;
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    vertical-align: middle;
}

/* Table Column Widths */
.col-id { width: 80px; }
.col-name { width: 120px; }
.col-symbol { width: 80px; }
.col-amplitude { width: 100px; }
.col-description { width: 200px; }
.col-actions { width: 120px; }

/* ===========================================
   DIALOGS
   =========================================== */
dialog {
    border: none;
    border-radius: var(--radius-lg);
    padding: 0;
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-md);
    background-color: var(--color-bg-dark);
}

dialog::backdrop {
    background: rgba(0, 0, 0, 0.5);
}

dialog:not([open]) {
    display: none;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-primary-dark);
}

.modal-header h3 {
    color: var(--color-text-primary);
    margin: 0;
}

.close-modal {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0;
    line-height: 1;
}

.close-modal:hover {
    color: var(--color-text-primary);
    background: none;
}

/* Form within Dialog */
dialog form {
    padding: var(--spacing-md);
    background-color: var(--color-bg-input);
    border: none;
    width: 100%;
}

dialog form label {
    color: var(--color-text-muted);
}

dialog form legend {
    color: var(--color-text-primary);
}

/* Dialog Fieldset */
.dialog-fieldset > div {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

/* Dialog Labels */
.dialog-label {
    display: inline-block;
    min-width: 110px;
}

.dialog-label-sm { min-width: 70px; }
.dialog-label-md { min-width: 110px; }
.dialog-label-lg { min-width: 150px; }
.dialog-label-xl { min-width: 170px; }

/* Dialog Input */
.dialog-input {
    flex: 1;
    min-width: 0;
    background-color: var(--color-bg-input);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color-scheme: dark;
}

.dialog-input::placeholder {
    color: var(--color-text-muted);
}

/* Re-add dropdown arrow for selects */
dialog select.dialog-input {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/* Dialog Buttons */
.dialog-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* Form Info Section */
.form-info {
    padding: var(--spacing-md);
    background-color: var(--color-bg-card);
    border-top: 1px solid var(--color-border-light);
    font-size: var(--font-size-sm);
}

.form-info p {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-text-secondary);
}

.form-info ul {
    margin: 0;
    padding-left: var(--spacing-lg);
    color: var(--color-text-muted);
}

.form-info li {
    margin-bottom: var(--spacing-xs);
}

/* ID Display Value */
.id-display-value {
    color: var(--color-text-primary);
}

/* ===========================================
   PAGINATION
   =========================================== */
.pagination {
    margin-top: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    max-width: 1200px;
}

.pagination .page-link {
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    background-color: transparent;
}

.pagination .page-link:hover {
    color: var(--color-accent-red-light);
}

.pagination .page-link.active {
    font-weight: bold;
    text-decoration: underline;
    pointer-events: none;
}

/* ===========================================
   DOCKED PROGRESS BAR
   Single line at bottom of main content area
   =========================================== */
.docked-progress {
    position: fixed;
    bottom: 0;
    left: var(--sidebar-width);
    right: 0;
    z-index: var(--z-floating);
    background-color: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: left var(--transition-slow);
}

.sidebar-collapsed .docked-progress {
    left: var(--sidebar-collapsed-width);
}

.docked-progress-inner {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    max-width: 1200px;
}

.docked-spinner {
    font-size: var(--font-size-md);
    color: var(--color-accent-blue-light);
    flex-shrink: 0;
}

.docked-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.docked-bar {
    flex: 1;
    height: 16px;
    min-width: 150px;
    max-width: 400px;
    background-color: var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

.docked-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-accent-blue) 0%, var(--color-accent-blue-light) 50%, var(--color-accent-blue) 100%);
    background-size: 200% 100%;
    border-radius: 8px;
    transition: width var(--transition-slow);
    animation: shimmer 2s infinite linear;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.docked-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
}

.docked-percent {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-accent-blue-light);
    white-space: nowrap;
    flex-shrink: 0;
}

/* ===========================================
   SIMULATION RESULT MODAL
   Centered dialog for completion/error
   =========================================== */
.simulation-result-modal {
    border: none;
    border-radius: var(--radius-lg);
    padding: 0;
    max-width: 450px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    background-color: var(--color-bg-dark);
}

.simulation-result-modal:not([open]) {
    display: none;
}

.simulation-result-modal::backdrop {
    background: rgba(0, 0, 0, 0.6);
}

.simulation-result-modal .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}

.simulation-result-modal .modal-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
}

.simulation-result-modal .modal-header h3 i {
    font-size: var(--font-size-xl);
}

.simulation-result-modal .modal-header h3 i.fa-check-circle {
    color: var(--color-success);
}

.simulation-result-modal .modal-header h3 i.fa-exclamation-triangle {
    color: var(--color-accent-red-light);
}

.simulation-result-content {
    padding: var(--spacing-lg);
    text-align: center;
}

.simulation-result-content p {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.simulation-result-content .result-details {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: italic;
}

.simulation-result-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
}

.simulation-result-actions button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    min-width: 100px;
}

/* ===========================================
   GRAPH / VISUALIZATION
   =========================================== */
.graph-container {
    margin: var(--spacing-lg) 0;
}

.graph-container img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    display: block;
}

.graph-interpretation {
    max-width: 800px;
    margin: 0 0 var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: rgba(30, 30, 50, 0.8);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.graph-interpretation p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

/* ===========================================
   YOUTUBE VIDEO
   =========================================== */
.video-container {
    margin: var(--spacing-lg) 0;
    max-width: 100%;
}

.video-container iframe {
    display: block;
    max-width: 100%;
    border-radius: var(--radius-lg);
}

/* ===========================================
   TUTORIAL PAGE
   =========================================== */
.tutorial-content {
    max-width: 100%;
}

.tutorial-content section {
    margin-bottom: var(--spacing-xl);
}

.tutorial-content p {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.tutorial-content ul,
.tutorial-content ol {
    padding-left: var(--spacing-xl);
}

.tutorial-content li {
    margin-bottom: var(--spacing-sm);
}

/* ===========================================
   NAVIGATION LIST (Homepage)
   =========================================== */
.nav-list {
    list-style: none;
    padding-left: 0;
}

.nav-list li {
    margin-bottom: var(--spacing-md);
}

/* ===========================================
   UTILITY CLASSES
   =========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }

/* ===========================================
   ICON SIZING
   =========================================== */
i.fas, i.fab {
    font-size: 1.2em;
    line-height: 1;
    vertical-align: middle;
    display: inline-block;
}