/**
 * =============================================================================
 * AIAlchemyHub TalentCraft — Core Application Stylesheet
 * =============================================================================
 *
 * File        : public/assets/css/main.css
 * Product     : TalentCraft — NextGen Talent Orchestration & Sprint Recruitment Platform
 * Initiative  : AIAlchemyHub
 * Version     : 0.1.0
 * Status      : Production Grade Initial Implementation
 * Created     : 2026-10-23
 * Copyright   : Copyright (c) 2026 AIAlchemyHub.
 * =============================================================================
 */

/* =============================================================================
   1. DESIGN TOKENS
   ============================================================================= */

:root {
    /* Brand colours: TalentCraft Precision Palette */
    --tc-colour-primary: #2563eb;
    --tc-colour-primary-hover: #1d4ed8;
    --tc-colour-primary-active: #1e40af;
    --tc-colour-primary-soft: #eff6ff;

    --tc-colour-accent: #0d9488;
    --tc-colour-accent-soft: #ccfbf1;

    /* Text colours */
    --tc-colour-heading: #0f172a;
    --tc-colour-text: #334155;
    --tc-colour-text-secondary: #475569;
    --tc-colour-text-muted: #64748b;
    --tc-colour-text-inverse: #ffffff;

    /* Surfaces and borders */
    --tc-colour-page: #f8fafc;
    --tc-colour-surface: #ffffff;
    --tc-colour-surface-subtle: #f1f5f9;
    --tc-colour-border: #e2e8f0;
    --tc-colour-border-strong: #cbd5e1;
    --tc-colour-navigation: #0f172a;

    /* Semantic feedback colours */
    --tc-colour-success: #16a34a;
    --tc-colour-success-soft: #f0fdf4;
    --tc-colour-warning: #d97706;
    --tc-colour-warning-soft: #fffbeb;
    --tc-colour-danger: #dc2626;
    --tc-colour-danger-soft: #fef2f2;
    --tc-colour-info: #0284c7;
    --tc-colour-info-soft: #f0f9ff;

    /* Focus and overlay */
    --tc-colour-focus: #2563eb;
    --tc-colour-overlay: rgb(15 23 42 / 60%);

    /* Typography */
    --tc-font-family-base: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --tc-font-family-heading: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --tc-font-family-monospace: "Cascadia Code", Consolas, "Liberation Mono", monospace;

    --tc-font-size-xs: 0.75rem;
    --tc-font-size-sm: 0.875rem;
    --tc-font-size-base: 1rem;
    --tc-font-size-lg: 1.125rem;
    --tc-font-size-xl: 1.25rem;
    --tc-font-size-2xl: 1.5rem;
    --tc-font-size-3xl: 1.875rem;
    --tc-font-size-4xl: 2.25rem;

    --tc-font-weight-normal: 400;
    --tc-font-weight-medium: 500;
    --tc-font-weight-semibold: 600;
    --tc-font-weight-bold: 700;

    --tc-line-height-tight: 1.25;
    --tc-line-height-heading: 1.35;
    --tc-line-height-base: 1.6;
    --tc-line-height-relaxed: 1.75;

    /* Spacing scale */
    --tc-space-0: 0;
    --tc-space-1: 0.25rem;
    --tc-space-2: 0.5rem;
    --tc-space-3: 0.75rem;
    --tc-space-4: 1rem;
    --tc-space-5: 1.25rem;
    --tc-space-6: 1.5rem;
    --tc-space-8: 2rem;
    --tc-space-10: 2.5rem;
    --tc-space-12: 3rem;
    --tc-space-16: 4rem;

    /* Layout */
    --tc-container-sm: 40rem;
    --tc-container-md: 48rem;
    --tc-container-lg: 64rem;
    --tc-container-xl: 75rem;
    --tc-container-fluid-padding: clamp(1rem, 3vw, 2rem);

    --tc-header-height: 4rem;
    --tc-sidebar-width: 16rem;

    /* Borders and elevation */
    --tc-border-width: 1px;
    --tc-border-width-strong: 2px;

    --tc-radius-sm: 0.25rem;
    --tc-radius-md: 0.5rem;
    --tc-radius-lg: 0.75rem;
    --tc-radius-xl: 1rem;
    --tc-radius-pill: 999px;

    --tc-shadow-sm: 0 1px 3px rgb(15 23 42 / 6%);
    --tc-shadow-md: 0 4px 12px rgb(15 23 42 / 8%);
    --tc-shadow-lg: 0 12px 32px rgb(15 23 42 / 12%);

    /* Interaction and motion */
    --tc-transition-fast: 150ms ease;
    --tc-transition-base: 200ms ease;
    --tc-focus-outline-width: 3px;
    --tc-focus-outline-offset: 2px;

    /* Layering scale */
    --tc-z-base: 1;
    --tc-z-sticky: 100;
    --tc-z-dropdown: 200;
    --tc-z-overlay: 300;
    --tc-z-modal: 400;
    --tc-z-toast: 500;
}

/* Dark Theme Tokens */
html[data-tc-theme="dark"] {
    color-scheme: dark;

    --tc-colour-heading: #f8fafc;
    --tc-colour-text: #e2e8f0;
    --tc-colour-text-secondary: #cbd5e1;
    --tc-colour-text-muted: #94a3b8;
    --tc-colour-text-inverse: #ffffff;

    --tc-colour-page: #0f172a;
    --tc-colour-surface: #1e293b;
    --tc-colour-surface-subtle: #334155;
    --tc-colour-border: #334155;
    --tc-colour-border-strong: #475569;
    --tc-colour-navigation: #0f172a;

    --tc-colour-focus: #60a5fa;
    --tc-colour-overlay: rgb(0 0 0 / 70%);

    --tc-colour-primary-soft: #1e3a8a;
    --tc-colour-accent-soft: #134e4a;

    --tc-colour-success: #4ade80;
    --tc-colour-success-soft: #064e3b;
    --tc-colour-warning: #fbbf24;
    --tc-colour-warning-soft: #78350f;
    --tc-colour-danger: #f87171;
    --tc-colour-danger-soft: #7f1d1d;
    --tc-colour-info: #38bdf8;
    --tc-colour-info-soft: #0c4a6e;
}

/* =============================================================================
   2. BASE RESET & DOCUMENT DEFAULTS
   ============================================================================= */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--tc-header-height) + var(--tc-space-4));
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background-color: var(--tc-colour-page);
    color: var(--tc-colour-text);
    font-family: var(--tc-font-family-base);
    font-size: var(--tc-font-size-base);
    font-weight: var(--tc-font-weight-normal);
    line-height: var(--tc-line-height-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

img, video {
    height: auto;
}

button, input, select, textarea {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

button:disabled, input:disabled, select:disabled, textarea:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

hr {
    height: 0;
    margin: var(--tc-space-6) 0;
    border: 0;
    border-top: var(--tc-border-width) solid var(--tc-colour-border);
}

::selection {
    background: var(--tc-colour-primary-soft);
    color: var(--tc-colour-heading);
}

/* =============================================================================
   3. TYPOGRAPHY
   ============================================================================= */

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: var(--tc-space-4);
    color: var(--tc-colour-heading);
    font-family: var(--tc-font-family-heading);
    font-weight: var(--tc-font-weight-semibold);
    line-height: var(--tc-line-height-heading);
    overflow-wrap: anywhere;
}

h1 { font-size: clamp(2rem, 4.5vw, 2.75rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.02em; }
h3 { font-size: var(--tc-font-size-xl); }
h4 { font-size: var(--tc-font-size-lg); }

p { margin-top: 0; margin-bottom: var(--tc-space-4); }
p:last-child { margin-bottom: 0; }

.tc-text-muted { color: var(--tc-colour-text-muted); }
.tc-text-secondary { color: var(--tc-colour-text-secondary); }
.tc-text-primary { color: var(--tc-colour-primary); }
.tc-text-accent { color: var(--tc-colour-accent); }

a {
    color: var(--tc-colour-primary);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
}
a:hover { color: var(--tc-colour-primary-hover); }

/* =============================================================================
   4. ACCESSIBILITY & LAYOUT
   ============================================================================= */

.tc-skip-link {
    position: absolute;
    z-index: var(--tc-z-toast);
    top: var(--tc-space-2);
    left: var(--tc-space-2);
    transform: translateY(-200%);
    padding: var(--tc-space-3) var(--tc-space-4);
    border-radius: var(--tc-radius-md);
    background-color: var(--tc-colour-surface);
    color: var(--tc-colour-heading);
    box-shadow: var(--tc-shadow-md);
}
.tc-skip-link:focus { 
    transform: translateY(0); 
}

:focus-visible {
    outline: var(--tc-focus-outline-width) solid var(--tc-colour-focus);
    outline-offset: var(--tc-focus-outline-offset);
}

.tc-container {
    width: 100%;
    max-width: var(--tc-container-xl);
    margin-right: auto;
    margin-left: auto;
    padding-right: var(--tc-container-fluid-padding);
    padding-left: var(--tc-container-fluid-padding);
}

/* Combined Sticky Header Wrapper */
.tc-header-wrapper {
    position: sticky;
    top: 0;
    z-index: var(--tc-z-sticky);
    box-shadow: var(--tc-shadow-sm);
}

/* Utility Top Bar */
.tc-utility-bar {
    background-color: var(--tc-colour-navigation);
    color: #94a3b8;
    font-size: var(--tc-font-size-xs);
    padding: var(--tc-space-2) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tc-utility-bar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tc-utility-bar__info {
    display: flex;
    align-items: center;
    gap: var(--tc-space-4);
}

.tc-utility-bar__item {
    display: flex;
    align-items: center;
    gap: var(--tc-space-1);
}

.tc-utility-bar__social {
    display: flex;
    gap: var(--tc-space-3);
}

.tc-utility-bar__social-link {
    color: #94a3b8;
    text-decoration: none;
    transition: color var(--tc-transition-fast);
}
.tc-utility-bar__social-link:hover { 
    color: #ffffff; 
}

/* Site Header */
.tc-site-header {
    background-color: var(--tc-colour-surface);
    border-bottom: var(--tc-border-width) solid var(--tc-colour-border);
    position: relative;
    width: 100%;
}

.tc-site-header__inner {
    display: flex;
    min-height: var(--tc-header-height);
    align-items: center;
    justify-content: space-between;
    gap: var(--tc-space-4);
}

.tc-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--tc-space-3);
    text-decoration: none;
    color: var(--tc-colour-heading);
}

.tc-brand__mark {
    display: inline-grid;
    width: 2.5rem;
    height: 2.5rem;
    place-items: center;
    border-radius: var(--tc-radius-md);
    background-color: var(--tc-colour-primary);
    color: var(--tc-colour-text-inverse);
    font-weight: var(--tc-font-weight-bold);
    font-size: 1.25rem;
}

.tc-brand__name {
    font-size: 1.25rem;
    font-weight: var(--tc-font-weight-bold);
    display: block;
    line-height: 1.1;
}

.tc-brand__descriptor {
    font-size: var(--tc-font-size-xs);
    color: var(--tc-colour-text-muted);
    display: block;
}

.tc-navigation {
    display: flex;
    align-items: center;
    gap: var(--tc-space-2);
}

.tc-navigation__list {
    display: flex;
    align-items: center;
    gap: var(--tc-space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.tc-navigation__link {
    display: inline-flex;
    align-items: center;
    padding: var(--tc-space-2) var(--tc-space-3);
    border-radius: var(--tc-radius-md);
    color: var(--tc-colour-text);
    font-size: var(--tc-font-size-sm);
    font-weight: var(--tc-font-weight-medium);
    text-decoration: none;
    transition: background-color var(--tc-transition-fast), color var(--tc-transition-fast);
}

/* Light Theme Active / Hover State */
.tc-navigation__link:hover,
.tc-navigation__link--active {
    background-color: var(--tc-colour-primary-soft);
    color: var(--tc-colour-primary-hover);
}

/* Dark Theme High-Contrast Active / Hover Override */
html[data-tc-theme="dark"] .tc-navigation__link:hover,
html[data-tc-theme="dark"] .tc-navigation__link--active {
    background-color: rgba(56, 189, 248, 0.15); /* Soft cyan/sky backdrop */
    color: #38bdf8;                              /* Vibrant high-contrast sky blue */
}


/* =============================================================================
   NAVIGATION DROPDOWN STYLES
   ============================================================================= */

.tc-navigation .dropdown-menu {
    border-radius: var(--tc-radius-md);
    background-color: var(--tc-colour-surface);
    border: var(--tc-border-width) solid var(--tc-colour-border);
    padding: var(--tc-space-2);
    box-shadow: var(--tc-shadow-md);
}

.tc-navigation .dropdown-item {
    color: var(--tc-colour-text);
    font-size: var(--tc-font-size-sm);
    font-weight: var(--tc-font-weight-medium);
    border-radius: var(--tc-radius-sm);
    transition: background-color var(--tc-transition-fast), color var(--tc-transition-fast);
}

/* Light Theme Dropdown Item Hover */
.tc-navigation .dropdown-item:hover,
.tc-navigation .dropdown-item:focus {
    background-color: var(--tc-colour-primary-soft);
    color: var(--tc-colour-primary-hover);
}

/* Dark Theme Dropdown Item Hover Override */
html[data-tc-theme="dark"] .tc-navigation .dropdown-item:hover,
html[data-tc-theme="dark"] .tc-navigation .dropdown-item:focus {
    background-color: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
}
/* Enable hover activation for desktop navigation */
@media (min-width: 992px) {
    .tc-navigation .dropdown:hover .dropdown-menu {
        display: block;
        margin-top: 0;
    }
}

















/* =============================================================================
   5. BUTTONS & COMPONENTS
   ============================================================================= */

.tc-button {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: var(--tc-space-2);
    padding: var(--tc-space-2) var(--tc-space-4);
    border: var(--tc-border-width) solid transparent;
    border-radius: var(--tc-radius-md);
    font-size: var(--tc-font-size-sm);
    font-weight: var(--tc-font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--tc-transition-fast), border-color var(--tc-transition-fast), color var(--tc-transition-fast);
}

.tc-button--primary {
    background-color: var(--tc-colour-primary);
    color: var(--tc-colour-text-inverse);
}
.tc-button--primary:hover {
    background-color: var(--tc-colour-primary-hover);
    color: var(--tc-colour-text-inverse);
}

.tc-button--secondary {
    border-color: var(--tc-colour-border-strong);
    background-color: var(--tc-colour-surface);
    color: var(--tc-colour-text);
}
.tc-button--secondary:hover {
    border-color: var(--tc-colour-primary);
    background-color: var(--tc-colour-primary-soft);
    color: var(--tc-colour-primary-hover);
}

.tc-button--small {
    min-height: 2.25rem;
    padding: var(--tc-space-1) var(--tc-space-3);
    font-size: var(--tc-font-size-xs);
}

.tc-card {
    padding: var(--tc-space-6);
    border: var(--tc-border-width) solid var(--tc-colour-border);
    border-radius: var(--tc-radius-lg);
    background-color: var(--tc-colour-surface);
    box-shadow: var(--tc-shadow-sm);
    transition: transform var(--tc-transition-fast), box-shadow var(--tc-transition-fast);
}

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

.tc-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem var(--tc-space-3);
    border-radius: var(--tc-radius-pill);
    font-size: var(--tc-font-size-xs);
    font-weight: var(--tc-font-weight-semibold);
}

.tc-badge--primary {
    background-color: var(--tc-colour-primary-soft);
    color: var(--tc-colour-primary);
}

.tc-badge--accent {
    background-color: var(--tc-colour-accent-soft);
    color: var(--tc-colour-accent);
}

/* =============================================================================
   6. HERO & WORKFLOW SLIDER
   ============================================================================= */

.tc-hero {
    padding: var(--tc-space-12) 0 var(--tc-space-16);
    background: linear-gradient(180deg, var(--tc-colour-surface) 0%, var(--tc-colour-page) 100%);
    border-bottom: var(--tc-border-width) solid var(--tc-colour-border);
}

.tc-hero__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--tc-space-8);
}

@media (min-width: 64rem) {
    .tc-hero__grid {
        grid-template-columns: 1.1fr 0.9fr;
        align-items: center;
    }
}

.tc-eyebrow {
    color: var(--tc-colour-accent);
    font-weight: var(--tc-font-weight-bold);
    font-size: var(--tc-font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--tc-space-2);
}

.tc-hero__title {
    margin-bottom: var(--tc-space-4);
}

.tc-hero__description {
    font-size: var(--tc-font-size-lg);
    color: var(--tc-colour-text-secondary);
    margin-bottom: var(--tc-space-6);
    max-width: 65ch;
}

.tc-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--tc-space-3);
    margin-bottom: var(--tc-space-4);
}

.tc-hero__note {
    font-size: var(--tc-font-size-xs);
    color: var(--tc-colour-text-muted);
}

.tc-workflow {
    padding: var(--tc-space-6);
    border: var(--tc-border-width) solid var(--tc-colour-border);
    border-radius: var(--tc-radius-xl);
    background-color: var(--tc-colour-surface);
    box-shadow: var(--tc-shadow-lg);
}

.tc-workflow__heading {
    display: flex;
    align-items: center;
    gap: var(--tc-space-2);
    font-size: var(--tc-font-size-xs);
    font-weight: var(--tc-font-weight-bold);
    color: var(--tc-colour-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--tc-space-4);
}

.tc-workflow__indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--tc-colour-accent);
}

.tc-workflow__step-number {
    font-size: var(--tc-font-size-xs);
    font-weight: var(--tc-font-weight-bold);
    color: var(--tc-colour-primary);
    margin-bottom: var(--tc-space-1);
}

.tc-workflow__step-title {
    font-size: var(--tc-font-size-xl);
    margin-bottom: var(--tc-space-2);
}

.tc-workflow__step-description {
    color: var(--tc-colour-text-secondary);
    font-size: var(--tc-font-size-sm);
    margin-bottom: var(--tc-space-4);
}

.tc-workflow__footer {
    display: flex;
    align-items: center;
    gap: var(--tc-space-2);
    font-size: var(--tc-font-size-xs);
    color: var(--tc-colour-text-muted);
    padding-top: var(--tc-space-3);
    border-top: var(--tc-border-width) solid var(--tc-colour-border);
    margin-bottom: var(--tc-space-4);
}

.tc-feature-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* =============================================================================
   7. FOOTER & BACK TO TOP
   ============================================================================= */

.tc-footer {
    background-color: var(--tc-colour-navigation, #0b1329);
    color: #94a3b8;
    padding-top: var(--tc-space-12, 3rem);
    padding-bottom: var(--tc-space-6, 1.5rem);
    border-top: var(--tc-border-width, 1px) solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 10;
}

.tc-footer h2, 
.tc-footer h3,
.tc-footer h4,
.tc-footer h5,
.tc-footer h6 { 
    color: #ffffff; 
    font-weight: var(--tc-font-weight-bold, 700);
}

.tc-footer p,
.tc-footer span {
    color: #94a3b8;
}

/* Footer Navigation Links */
.tc-footer__links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tc-footer__links li {
    margin-bottom: var(--tc-space-2, 0.5rem);
}

.tc-footer__links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: var(--tc-font-size-sm, 0.875rem);
    transition: color var(--tc-transition-fast, 0.2s ease), transform var(--tc-transition-fast, 0.2s ease);
    display: inline-block;
}

.tc-footer__links a:hover,
.tc-footer__links a:focus-visible { 
    color: #38bdf8 !important; /* Sky Blue High-Contrast Hover State */
    transform: translateX(2px);
}

/* Engineering Philosophy Banner Box */
.tc-footer__philosophy {
    background: linear-gradient(90deg, rgba(30, 58, 138, 0.25) 0%, rgba(13, 148, 136, 0.25) 100%);
    background-color: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    border-radius: var(--tc-radius-md, 0.5rem);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.05);
}

/* Footer Bottom Legal Bar */
.tc-footer__bottom {
    margin-top: var(--tc-space-8, 2rem);
    padding-top: var(--tc-space-4, 1rem);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--tc-font-size-xs, 0.75rem);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--tc-space-3, 0.75rem);
    color: #64748b;
}

.tc-footer__bottom strong {
    color: #cbd5e1;
}

/* Utility Helper Classes within Footer Scope */
.tracking-wider {
    letter-spacing: 0.05em;
}

.fs-xs {
    font-size: 0.75rem !important;
}

/* Back to Top Floating Button */
.tc-back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: var(--tc-z-sticky, 1020);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background-color: var(--tc-colour-primary, #1e3a8a);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--tc-shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.3));
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--tc-transition-fast, 0.2s ease), 
                visibility var(--tc-transition-fast, 0.2s ease), 
                transform var(--tc-transition-fast, 0.2s ease), 
                background-color var(--tc-transition-fast, 0.2s ease),
                border-color var(--tc-transition-fast, 0.2s ease);
}

.tc-back-to-top.tc-back-to-top--visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tc-back-to-top:hover { 
    background-color: var(--tc-colour-primary-hover, #1d4ed8); 
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.tc-back-to-top:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 3px;
}

/* Dark Theme Adjustments for Footer */
html[data-tc-theme="dark"] .tc-footer {
    background-color: #020617;
    border-top-color: #1e293b;
}

html[data-tc-theme="dark"] .tc-back-to-top {
    background-color: #38bdf8;
    color: #0f172a;
    border-color: rgba(0, 0, 0, 0.1);
}

html[data-tc-theme="dark"] .tc-back-to-top:hover {
    background-color: #0ea5e9;
    color: #ffffff;
}

/* High-Contrast Footer License Badge */
.tc-footer-license-badge {
    background-color: rgba(30, 41, 59, 0.9);
    color: #f8fafc !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--tc-radius-sm, 0.25rem);
    padding: 0.15rem 0.5rem;
    font-family: var(--tc-font-family-monospace, monospace);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* =============================================================================
   THEME TOGGLE SWITCH STYLES
   ============================================================================= */
 
.tc-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--tc-space-2);
    padding: var(--tc-space-1) var(--tc-space-3);
    border: var(--tc-border-width) solid var(--tc-border-strong);
    border-radius: var(--tc-radius-pill);
    background-color: var(--tc-colour-surface);
    color: var(--tc-colour-text);
    font-size: var(--tc-font-size-xs);
    font-weight: var(--tc-font-weight-medium);
    cursor: pointer;
    transition: background-color var(--tc-transition-fast), border-color var(--tc-transition-fast);
}

/* Ensure child elements don't block clicks */
.tc-theme-toggle *,
.tc-theme-toggle *:before,
.tc-theme-toggle *:after {
    pointer-events: none;
}

.tc-theme-toggle:hover {
    border-color: var(--tc-colour-primary);
    background-color: var(--tc-colour-primary-soft);
    color: var(--tc-colour-primary-hover);
}

.tc-theme-toggle__track {
    display: inline-block;
    width: 2rem;
    height: 1rem;
    border-radius: var(--tc-radius-pill);
    background-color: var(--tc-colour-border-strong);
    position: relative;
    transition: background-color var(--tc-transition-fast);
}

.tc-theme-toggle__thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: calc(1rem - 4px);
    height: calc(1rem - 4px);
    border-radius: 50%;
    background-color: #ffffff;
    transition: transform var(--tc-transition-fast);
}

/* Corrected Dark Mode Track & Thumb translation */
html[data-tc-theme="dark"] .tc-theme-toggle__track {
    background-color: var(--tc-colour-primary);
}

html[data-tc-theme="dark"] .tc-theme-toggle__thumb {
    transform: translateX(1rem);
}