/* ============================================================================
   MINFX DESIGN SYSTEM
   ============================================================================
   
   This stylesheet defines a consistent design system for the Minfx website.
   It's organized into the following sections:
   
   1. DESIGN TOKENS (CSS Variables)
   2. RESET & BASE STYLES
   3. TYPOGRAPHY
   4. LAYOUT
   5. COMPONENTS (Header, Buttons, Info boxes)
   6. CODE & SYNTAX
   7. SPECIFIC SECTIONS (Demo, Migration, Preorder)
   8. UTILITIES
   9. RESPONSIVE BREAKPOINTS
   
   ============================================================================ */


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

:root {
    /* --------------------------------------------------------------------------
       Color Palette
       -------------------------------------------------------------------------- */

    /* Primary brand colors */
    --color-primary: #204cab;
    --color-primary-hover: #1a3d8a;
    --color-primary-active: #153172;
    --color-primary-rgb: 32, 76, 171;
    --color-link-visited: #6d28d9;
    --color-primary-light: #dbeafe;
    --color-primary-lighter: #bfdbfe;

    /* Accent / secondary colors */
    --color-accent: #38bdf8;
    --color-accent-hover: #0ea5e9;
    --color-accent-rgb: 56, 189, 248;
    --color-secondary: #1e293b;

    /* Purple accent (for special highlights) */
    --color-purple: #6d28d9;
    --color-purple-light: #a78bfa;

    /* Indigo (for gradients and accents) */
    --color-indigo: #6366f1;
    --color-indigo-rgb: 99, 102, 241;

    /* Teal (for migration section) */
    --color-teal: #21808d;
    --color-teal-rgb: 33, 128, 141;
    --color-teal-light: #32b8c6;
    --color-teal-light-rgb: 50, 184, 198;

    /* Semantic colors */
    --color-success: #22c55e;
    --color-success-light: #dcfce7;
    --color-success-lighter: #bbf7d0;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-error-hover: #dc2626;
    --color-error-rgb: 220, 38, 38;
    --color-info: #3b82f6;
    --color-info-light: #e0f2fe;

    /* Neutral colors */
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-secondary-rgb: 100, 116, 139;
    --color-text-muted: #94a3b8;
    --color-text-disabled: #cbd5e0;

    /* Background colors */
    --color-background: #f8fafc;
    --color-background-alt: #f1f5f9;
    --color-background-alt2: #f8f9fa;
    --color-surface: #ffffff;
    --color-surface-dark: #0f172a;
    --color-surface-darker: #0a0f1a;
    --color-black-rgb: 0, 0, 0;
    --color-border: #e2e8f0;
    --color-border-light: rgba(100, 116, 139, 0.2);

    /* Card-specific colors */
    --color-card-bg: var(--color-surface);
    --color-card-border: var(--color-border);
    --color-card-border-inner: var(--color-border);

    /* Code block colors */
    --color-code-bg: #0f172a;
    --color-code-bg-rgb: 15, 23, 42;
    --color-code-bg-alt: #1e293b;
    --color-code-text: #f1f5f9;
    --color-code-keyword: #38bdf8;
    --color-code-builtin: #facc15;
    --color-code-string: #4ade80;
    --color-code-comment: #94a3b8;
    --color-code-number: #f472b6;

    /* Code diff highlight colors */
    --color-diff-old-bg: rgba(255, 100, 100, 0.25);
    --color-diff-new-bg: rgba(100, 255, 130, 0.3);

    /* Button text colors */
    --color-btn-primary-text: #ffffff;

    /* Legacy aliases (for backward compatibility) */
    --primary: var(--color-primary);
    --secondary: var(--color-secondary);
    --background: var(--color-background);
    --text: var(--color-text);
    --accent: var(--color-accent);
    --white: var(--color-surface);
    --gray: var(--color-text-secondary);

    /* --------------------------------------------------------------------------
       Typography
       -------------------------------------------------------------------------- */

    --font-family-base: 'Inter', 'Segoe UI', Arial, sans-serif;
    --font-family-mono: 'Fira Mono', 'Consolas', 'Monaco', monospace;

    --font-size-xs: 0.75rem;
    /* 12px */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 1.875rem;
    /* 30px */
    --font-size-4xl: 2.25rem;
    /* 36px */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    --line-height-tight: 1.25;
    --line-height-base: 1.6;
    --line-height-relaxed: 1.75;

    /* --------------------------------------------------------------------------
       Spacing
       -------------------------------------------------------------------------- */

    --spacing-xs: 0.25rem;
    /* 4px */
    --spacing-sm: 0.5rem;
    /* 8px */
    --spacing-md: 1rem;
    /* 16px */
    --spacing-lg: 1.5rem;
    /* 24px */
    --spacing-xl: 2rem;
    /* 32px */
    --spacing-2xl: 3rem;
    /* 48px */
    --spacing-3xl: 4rem;
    /* 64px */

    /* --------------------------------------------------------------------------
       Border Radius
       -------------------------------------------------------------------------- */

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Legacy alias */
    --border-radius: var(--radius-md);

    /* --------------------------------------------------------------------------
       Shadows
       -------------------------------------------------------------------------- */

    --shadow-sm: 0 1px 2px rgba(30, 41, 59, 0.05);
    --shadow-md: 0 2px 8px rgba(30, 41, 59, 0.08);
    --shadow-lg: 0 4px 16px rgba(30, 41, 59, 0.12);
    --shadow-xl: 0 8px 24px rgba(30, 41, 59, 0.16);

    /* Legacy alias */
    --shadow: var(--shadow-md);

    /* --------------------------------------------------------------------------
       Transitions
       -------------------------------------------------------------------------- */

    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;

    --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);

    /* --------------------------------------------------------------------------
       Layout
       -------------------------------------------------------------------------- */

    --max-width-content: 750px;
    --max-width-wide: 1200px;
    --header-height: 56px;

    /* Modal-specific */
    --modal-toolbar-top: 28px;
    --modal-btn-height: 40px;
    --modal-toolbar-gap: 28px;
    --modal-header-height: calc(var(--modal-toolbar-top) + var(--modal-btn-height) + var(--modal-toolbar-gap));

    /* --------------------------------------------------------------------------
       Z-Index Scale
       -------------------------------------------------------------------------- */

    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 500;
    --z-modal-backdrop: 1000;
    --z-modal: 1100;
    --z-tooltip: 1200;
}

/* ============================================================================
   DARK MODE TOKENS
   ============================================================================ */

body.dark-mode {
    --color-primary: #60a5fa;
    --color-primary-hover: #3b82f6;
    --color-primary-active: #2563eb;
    --color-primary-rgb: 96, 165, 250;
    --color-link-visited: #a78bfa;
    --color-primary-light: #1e3a5f;
    --color-primary-lighter: #1e3a5f;

    --color-accent-rgb: 56, 189, 248;

    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-secondary-rgb: 148, 163, 184;
    --color-text-muted: #64748b;
    --color-text-disabled: #4a5568;
    --color-background: #181e29;
    --color-background-alt: #232b3b;
    --color-background-alt2: #232b3b;
    --color-surface: #1e293b;
    --color-surface-dark: #0a192f;
    --color-surface-darker: #050a14;
    --color-border: #334155;
    --color-border-light: rgba(148, 163, 184, 0.2);

    --color-card-bg: #1e293b;
    --color-card-border: #334155;
    --color-card-border-inner: #334155;

    --color-code-bg: #0a192f;
    --color-code-bg-alt: #0f172a;

    --color-info-light: #1e3a5f;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.35);

    /* Legacy aliases update */
    --white: var(--color-surface);
    --gray: var(--color-text-secondary);
}


/* ============================================================================
   2. RESET & BASE STYLES
   ============================================================================ */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
    overflow-x: hidden;
    touch-action: manipulation;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background: var(--color-background);
    margin: 0;
    padding: 0;
    padding-top: var(--header-height);
    overflow-y: auto;
    overflow-x: hidden;
}


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

h1,
h2,
h3,
h4,
h5,
h6 {
    margin-top: 0;
    line-height: var(--line-height-tight);
    color: var(--color-primary);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
}

h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

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

a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--duration-normal) var(--ease-standard);
}

a:visited {
    color: var(--color-link-visited);
}

a:hover {
    color: var(--color-error);
}

ul,
ol {
    margin-top: 0;
    padding-left: var(--spacing-lg);
}

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


/* ============================================================================
   4. LAYOUT
   ============================================================================ */

section {
    max-width: var(--max-width-content);
    margin: var(--spacing-2xl) auto;
    padding: var(--spacing-xl);
    background: var(--color-surface);
}

section.wide {
    max-width: 1100px;
}

border-radius: var(--radius-md);
box-shadow: var(--shadow-md);
}

body.dark-mode section {
    background: var(--color-surface);
    color: var(--color-text);
}


/* ============================================================================
   5. COMPONENTS
   ============================================================================ */

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */

header {
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0 var(--spacing-xl);
    gap: var(--spacing-lg);
    position: relative;
}

/* Main navbar content */
.navbar-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.navbar-main .logo {
    flex-shrink: 0;
}

.navbar-main .main-nav {
    flex-shrink: 0;
}

.navbar-main .navbar-buttons {
    flex-shrink: 0;
}

/* Hero banner below header */
.hero-banner {
    background: linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-background) 100%);
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.hero-tagline {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    margin: 0;
    line-height: 1.6;
}

.hero-tagline em {
    color: var(--color-primary);
    font-style: normal;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
}

.logo img {
    height: 32px;
    margin-right: var(--spacing-xs);
}

nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-xl);
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--color-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--duration-normal);
}

nav a:hover {
    color: var(--color-primary);
}

.navbar-buttons {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-shrink: 0;
}

.navbar-buttons .contact-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Mobile contact button - hidden on desktop */
.navbar-buttons-mobile {
    display: none;
}

@media (max-width: 768px) {
    .navbar-buttons.desktop-only {
        display: none;
    }

    .navbar-buttons-mobile {
        display: flex;
        margin-left: auto;
        margin-right: var(--spacing-sm);
    }

    .navbar-buttons-mobile .contact-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

/* Header tagline - shown only on wide screens, far right */
.header-tagline {
    position: absolute;
    right: var(--spacing-xl);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    white-space: nowrap;
    opacity: 0.85;
}

.header-tagline em {
    font-style: italic;
    color: var(--color-primary);
}

@media (max-width: 1400px) {
    .header-tagline {
        display: none;
    }
}

body.dark-mode header {
    background: var(--color-surface);
    color: var(--color-text);
}

body.dark-mode nav a {
    color: var(--color-text-secondary);
}

body.dark-mode nav a:hover {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Shared Menu Component
   -------------------------------------------------------------------------- */

.main-nav {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    margin: 0;
    padding: 0;
    align-items: center;
}

.main-nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
    display: inline-block;
}

.main-nav a:hover {
    color: var(--color-primary);
    background: var(--color-primary-soft);
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(var(--color-primary-rgb), 0.2);
}

.main-nav a.active {
    color: var(--color-primary);
    background: var(--color-primary-soft);
}

/* External link icon */
.external-link-icon {
    margin-left: 3px;
    vertical-align: middle;
    opacity: 0.6;
    transition: opacity var(--duration-fast);
}

.main-nav a:hover .external-link-icon {
    opacity: 1;
}

/* Theme toggle button */
.theme-toggle-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.theme-icon-dark {
    display: none;
}

[data-theme="dark"] .theme-icon-light {
    display: none;
}

[data-theme="dark"] .theme-icon-dark {
    display: inline;
}

/* Logo with text */
.logo-img {
    height: 36px;
    margin-right: var(--spacing-sm);
    transition: filter var(--duration-normal) var(--ease-standard);
}

.logo-img:hover {
    filter: brightness(0) saturate(100%) invert(32%) sepia(98%) saturate(2351%) hue-rotate(339deg) brightness(98%) contrast(96%);
}

.logo-text {
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    color: var(--color-primary);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: calc(var(--z-fixed) + 1);
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--duration-normal);
}

.mobile-menu-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.open span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile responsive navigation */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--duration-normal), opacity var(--duration-normal), visibility var(--duration-normal);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .main-nav a {
        display: block;
        padding: var(--spacing-md);
    }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

/* Contact button */
.contact-btn {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border: none;
    border-radius: var(--radius-md);
    padding: 0.9rem 2rem;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(var(--color-primary-rgb), 0.4);
    transition: background var(--duration-normal), transform var(--duration-normal), box-shadow var(--duration-normal);
}

.contact-btn:visited {
    color: var(--color-btn-primary-text);
}

.contact-btn:hover {
    background: var(--color-primary-hover);
    color: var(--color-btn-primary-text);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 30px rgba(var(--color-primary-rgb), 0.6);
}

/* Pre-order / action button */
.preorder-btn {
    display: inline-block;
    background: var(--color-error);
    color: var(--color-btn-primary-text);
    border: none;
    border-radius: var(--radius-md);
    padding: 0.9rem 2rem;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(var(--color-error-rgb), 0.4);
    transition: background var(--duration-normal), transform var(--duration-normal), box-shadow var(--duration-normal);
}

.preorder-btn:visited {
    color: var(--color-btn-primary-text);
}

.preorder-btn:hover {
    background: var(--color-error-hover);
    color: var(--color-btn-primary-text);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 30px rgba(var(--color-error-rgb), 0.6);
}

.preorder-btn-large {
    padding: 1.2rem 3rem;
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xl);
}

/* --------------------------------------------------------------------------
   Info Boxes
   -------------------------------------------------------------------------- */

.info-box {
    background: var(--color-background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-xl) 0;
    border-left: 4px solid var(--color-accent);
}

.info-box p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

body.dark-mode .info-box {
    background: var(--color-background-alt);
}

/* Progress box */
.progress-box {
    background: var(--color-background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.progress-box table {
    width: 100%;
    border-collapse: collapse;
}

.progress-box td {
    padding: var(--spacing-sm) var(--spacing-md);
    vertical-align: top;
}

.progress-box td:first-child {
    width: 25%;
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Definition Lists (FAQ style)
   -------------------------------------------------------------------------- */

dl {
    background: var(--color-background);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin: var(--spacing-lg) 0;
}

dt {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    font-size: 1.05rem;
    margin-top: 1.25rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--color-border-light);
}

dt:first-child {
    margin-top: 0;
}

dd {
    margin: var(--spacing-sm) 0 0 0;
    padding-left: var(--spacing-md);
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
    position: relative;
    border-left: 4px solid var(--color-primary);
}

dd+dd {
    margin-top: var(--spacing-xs);
}

body.dark-mode dl {
    background: var(--color-background-alt);
}

body.dark-mode dd {
    border-left-color: var(--color-accent);
}

body.dark-mode dt {
    color: var(--color-accent);
    border-bottom-color: var(--color-border-light);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

footer {
    background: var(--color-secondary);
    color: var(--color-btn-primary-text);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: var(--spacing-2xl);
    font-size: var(--font-size-base);
}

footer a {
    color: var(--color-accent);
}

body.dark-mode footer {
    background: var(--color-secondary);
    color: var(--color-text-secondary);
}


/* ============================================================================
   6. CODE & SYNTAX
   ============================================================================ */

pre code.python {
    display: block;
    background: var(--color-code-bg);
    color: var(--color-code-text);
    font-family: var(--font-family-mono);
    border-radius: var(--radius-md);
    padding: 1.2rem;
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    white-space: pre;
}

body.dark-mode pre code.python {
    background: var(--color-code-bg);
    color: var(--color-code-text);
}

/* Python syntax highlighting */
pre code.python .k {
    color: var(--color-code-keyword);
    font-weight: var(--font-weight-semibold);
}

pre code.python .nb {
    color: var(--color-code-builtin);
}

pre code.python .s {
    color: var(--color-code-string);
}

pre code.python .c {
    color: var(--color-code-comment);
    font-style: italic;
}

pre code.python .m {
    color: var(--color-code-number);
}

pre code.python .nf,
pre code.python .nc {
    color: var(--color-code-number);
    font-weight: var(--font-weight-semibold);
}

/* Install command styling */
.install-command {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-code-bg) 0%, var(--color-code-bg-alt) 100%);
    color: var(--color-code-text);
    font-family: var(--font-family-mono);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-lg) auto;
    max-width: 320px;
    font-size: var(--font-size-lg);
    box-shadow: 0 4px 12px rgba(var(--color-code-bg-rgb), 0.3);
    border: 1px solid rgba(var(--color-accent-rgb), 0.2);
}

.install-command .install-prefix {
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
    user-select: none;
}

.install-command code {
    color: var(--color-code-string);
    font-weight: var(--font-weight-medium);
}

.install-command .copy-btn {
    background: transparent;
    border: none;
    padding: var(--spacing-xs);
    margin-left: 0.75rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: color var(--duration-normal), background var(--duration-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.install-command .copy-btn:hover {
    color: var(--color-accent);
    background: rgba(var(--color-accent-rgb), 0.1);
}

.install-command .copy-btn.copied {
    color: var(--color-code-string);
}

.install-command .copy-btn svg {
    width: 18px;
    height: 18px;
}

body.dark-mode .install-command {
    background: linear-gradient(135deg, var(--color-surface-darker) 0%, var(--color-code-bg-alt) 100%);
    box-shadow: 0 4px 12px rgba(var(--color-black-rgb), 0.4);
}

/* Code comparison (before/after) */
.code-comparison {
    display: flex;
    gap: 24px;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.code-column {
    flex: 1;
    min-width: 0;
}

.code-label {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    opacity: 0.7;
}

.code-column pre {
    margin: 0;
    height: 100%;
}

/* Code diff highlights */
.hl-old {
    background: var(--color-diff-old-bg);
    border-radius: 3px;
    padding: 1px 4px;
    margin: 0 -2px;
}

.hl-new {
    background: var(--color-diff-new-bg);
    border-radius: 3px;
    padding: 1px 4px;
    margin: 0 -2px;
}


/* ============================================================================
   7. SPECIFIC SECTIONS
   ============================================================================ */

/* --------------------------------------------------------------------------
   Demo Section
   -------------------------------------------------------------------------- */

#demo {
    width: 100%;
    max-width: var(--max-width-wide);
    position: relative;
}

/* Demo link button */
.demo-link {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(var(--color-primary-rgb), 0.4);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    transition: background var(--duration-normal), transform var(--duration-normal);
}

.demo-link:visited {
    color: var(--color-btn-primary-text);
}

.demo-link:hover {
    background: var(--color-primary-hover);
    color: var(--color-btn-primary-text);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 30px rgba(var(--color-primary-rgb), 0.5);
}

/* Demo screenshot */
.demo-screenshot-container {
    text-align: center;
    margin: var(--spacing-md) 0;
}

.demo-screenshot {
    max-width: 100%;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: transform var(--duration-normal), box-shadow var(--duration-normal);
}

.demo-screenshot:hover {
    transform: scale(1.01);
    box-shadow: 0 4px 20px rgba(var(--color-black-rgb), 0.2);
}

.demo-screenshot-container .screenshot-hint {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

/* Screenshot lightbox modal */
.screenshot-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(var(--color-black-rgb), 0.9);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.screenshot-modal.open {
    display: flex;
}

.screenshot-modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
    transition: color var(--duration-normal);
}

.screenshot-modal-close:hover {
    color: var(--color-accent);
}

.screenshot-modal-content {
    max-width: 95%;
    max-height: 95%;
    object-fit: contain;
    border-radius: var(--radius-md);
}

/* Demo modal overlay */
#demo-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: transparent;
    z-index: 10000;
    flex-direction: column;
    box-sizing: border-box;
    pointer-events: none;
}

#demo-modal-overlay.open {
    display: flex;
}

#demo-modal-toolbar {
    flex-shrink: 0;
    height: var(--modal-header-height);
    padding-right: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    z-index: 10001;
    pointer-events: auto;
}

#demo-modal-content {
    flex: 1;
    min-height: 0;
    position: relative;
    width: 100%;
    background: var(--color-background);
    cursor: default;
    overflow: hidden;
    pointer-events: auto;
}

.modal-close-hint {
    font-size: var(--font-size-sm);
}

#close-demo-btn {
    background: var(--color-error);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    z-index: 10001;
    transition: background var(--duration-normal), transform var(--duration-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

#close-demo-btn:hover {
    background: var(--color-error-hover);
    transform: scale(1.1);
}

/* Prevent egui's hidden text input from causing scroll jumps */
body>textarea,
body>input {
    position: fixed !important;
    top: 50vh !important;
    left: 50vw !important;
    width: 1px !important;
    height: 1px !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

/* --------------------------------------------------------------------------
   Pre-order Section
   -------------------------------------------------------------------------- */

.preorder-section {
    max-width: var(--max-width-wide);
    margin: var(--spacing-md) auto;
    padding: var(--spacing-md);
    background: var(--color-background);
    border-radius: var(--radius-md);
    text-align: center;
}

body.dark-mode .preorder-section {
    background: var(--color-secondary);
}

/* Seats counter */
.seats-counter {
    margin-top: var(--spacing-md);
}

.seats-label {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.seats-display {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-surface);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

body.dark-mode .seats-display {
    background: var(--color-secondary);
}

.seats-number {
    font-size: 3rem;
    font-weight: var(--font-weight-extrabold);
    background: linear-gradient(135deg, var(--color-error-hover) 0%, var(--color-error) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.seats-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Neptune Migration Section
   -------------------------------------------------------------------------- */

.neptune-migration-section {
    background: linear-gradient(135deg, rgba(var(--color-teal-rgb), 0.08) 0%, rgba(var(--color-teal-rgb), 0.04) 100%);
    border-top: 2px solid var(--color-primary);
    border-bottom: 1px solid var(--color-border);
    padding: 60px 20px;
    margin: 80px 0 60px 0;
}

.migration-container {
    max-width: var(--max-width-wide);
    margin: 0 auto;
}

.migration-header {
    text-align: center;
    margin-bottom: 50px;
}

.migration-header h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.migration-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--line-height-base);
}

.migration-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

/* Features grid for why page */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.feature-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--duration-normal) var(--ease-standard);
    text-decoration: none;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.feature-card:visited {
    color: inherit;
}

/* Feature card header */
.feature-header {
    margin-bottom: var(--spacing-sm);
}

.feature-header strong {
    font-size: var(--font-size-lg);
    color: var(--color-text);
}

/* Feature summary text */
.feature-summary {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.feature-card p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

/* Feature Popup Modal */
.feature-popup-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: var(--z-modal-backdrop);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-standard);
}

.feature-popup-overlay.open {
    display: flex;
    opacity: 1;
}

.feature-popup-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--spacing-2xl);
    position: relative;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform var(--duration-normal) var(--ease-out);
}

.feature-popup-overlay.open .feature-popup-content {
    transform: scale(1);
}

.feature-popup-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
}

.feature-popup-close:hover {
    background: var(--color-background);
    color: var(--color-text);
}

.feature-popup-content h2 {
    margin-top: 0;
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-2xl);
    font-size: var(--font-size-2xl);
}

.feature-popup-content p {
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
}

.feature-popup-content p:last-child {
    margin-bottom: 0;
}

.feature-popup-content a {
    color: var(--color-primary);
}

.lead {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-xl);
}

.cta-section {
    text-align: center;
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

.cta-btn {
    display: inline-block;
    margin-top: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--duration-normal);
}

.cta-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
}

.migration-card {
    background: var(--color-surface);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.migration-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.migration-card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-card-border-inner);
}

.migration-card-header h3 {
    margin: 0;
    font-size: var(--font-size-xl);
    color: var(--color-text);
}

.migration-action {
    text-align: center;
}

.migration-primary {
    border-color: var(--color-primary);
    border-width: 2px;
}

/* Migration steps */
.migration-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    align-items: flex-start;
}

.step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    width: 100%;
    justify-content: flex-start;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    width: 36px;
    height: 36px;
    background: rgba(var(--color-primary-rgb), 0.1);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    flex-shrink: 0;
}

.step p {
    margin: 0;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    padding-top: 4px;
    text-align: left;
}

.migration-note {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-align: center;
    margin: 0;
    line-height: 1.4;
}

/* Offer table */
.offer-table {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-card-border-inner);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.offer-row {
    display: grid;
    grid-template-columns: 160px 1fr;
    border-bottom: 1px solid var(--color-card-border-inner);
    font-size: var(--font-size-lg);
}

.offer-row:last-child {
    border-bottom: none;
}

.offer-cell {
    padding: var(--spacing-md) var(--spacing-lg);
    line-height: 1.5;
}

.offer-cell.label {
    background: rgba(var(--color-primary-rgb), 0.05);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    border-right: 1px solid var(--color-card-border-inner);
    display: flex;
    align-items: center;
}

.offer-cell.value {
    color: var(--color-text);
}

/* Dark mode adjustments for migration section */
@media (prefers-color-scheme: dark) {
    .neptune-migration-section {
        background: linear-gradient(135deg, rgba(var(--color-teal-light-rgb), 0.06) 0%, rgba(var(--color-teal-light-rgb), 0.02) 100%);
    }
}

[data-color-scheme="dark"] .neptune-migration-section {
    background: linear-gradient(135deg, rgba(var(--color-teal-light-rgb), 0.06) 0%, rgba(var(--color-teal-light-rgb), 0.02) 100%);
}


/* ============================================================================
   8. UTILITIES
   ============================================================================ */

/* Loading spinner (from loading.io/css/) */
.lds-dual-ring {
    display: inline-block;
    width: 24px;
    height: 24px;
}

.lds-dual-ring:after {
    content: " ";
    display: block;
    width: 24px;
    height: 24px;
    margin: 0;
    border-radius: 50%;
    border: 3px solid var(--color-primary);
    border-color: var(--color-primary) transparent var(--color-primary) transparent;
    animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Centered content */
.centered {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}


/* ============================================================================
   9. RESPONSIVE BREAKPOINTS
   ============================================================================ */

/* --------------------------------------------------------------------------
   Small tablets and large phones (max-width: 800px)
   -------------------------------------------------------------------------- */

@media (max-width: 800px) {
    .navbar-main {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    section {
        padding: var(--spacing-md);
    }
}

/* --------------------------------------------------------------------------
   Mobile (max-width: 768px)
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {

    /* Adjust header padding */
    header {
        padding: var(--spacing-sm) 0;
        z-index: 1000;
    }

    /* Adjust body padding for smaller header */
    body {
        padding-top: 60px;
    }

    /* Navbar mobile layout */
    .navbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: nowrap;
        padding: 0 var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    .navbar .logo {
        position: static;
        flex-shrink: 0;
    }

    .navbar .logo img {
        height: 28px;
    }

    .hero-banner {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .hero-tagline {
        font-size: var(--font-size-sm);
    }

    .navbar-buttons {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 0.3rem;
        flex-shrink: 0;
    }

    .navbar .contact-btn,
    .navbar .preorder-btn {
        padding: 0.35rem 0.5rem;
        font-size: 0.7rem;
        white-space: nowrap;
        border-radius: var(--radius-sm);
    }

    /* Migration grid mobile */
    .migration-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* Code comparison mobile */
    .code-comparison {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    /* Section margins */
    section {
        margin-left: var(--spacing-md);
        margin-right: var(--spacing-md);
        width: calc(100% - 2rem);
        max-width: 100%;
    }

    .preorder-section {
        width: 100%;
        max-width: 100%;
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
        box-sizing: border-box;
    }
}

/* --------------------------------------------------------------------------
   Offer table mobile (max-width: 480px)
   -------------------------------------------------------------------------- */

@media (max-width: 480px) {
    .offer-row {
        grid-template-columns: 1fr;
    }

    .offer-cell.label {
        border-right: none;
        border-bottom: 1px solid var(--color-card-border-inner);
        padding-bottom: var(--spacing-sm);
        background: transparent;
        color: var(--color-text);
        text-transform: uppercase;
        font-size: 11px;
        letter-spacing: 0.5px;
    }

    .offer-cell.value {
        padding-top: var(--spacing-sm);
    }
}

/* --------------------------------------------------------------------------
   Extra small screens - iPhone SE, etc. (max-width: 400px)
   -------------------------------------------------------------------------- */

@media (max-width: 400px) {
    .preorder-btn-large {
        padding: 0.8rem 1.5rem;
        font-size: var(--font-size-base);
    }
}

/* --------------------------------------------------------------------------
   Blog Styles
   -------------------------------------------------------------------------- */

/* Blog index page */
.blog-posts {
    margin-top: var(--spacing-2xl);
}

.blog-post-preview {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.blog-post-preview:last-child {
    border-bottom: none;
}

.blog-post-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
}

.blog-post-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--duration-normal);
}

.blog-post-title a:visited {
    color: var(--color-text);
}

.blog-post-title a:hover {
    color: var(--color-primary);
}

.blog-post-meta {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.blog-post-meta time {
    font-weight: var(--font-weight-medium);
}

.blog-post-excerpt {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.blog-post-excerpt p {
    margin-bottom: var(--spacing-md);
}

.read-more {
    display: inline-block;
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--duration-normal);
}

.read-more:hover {
    color: var(--color-primary-hover);
    transform: translateX(4px);
}

/* Blog post page */
.breadcrumb {
    margin-bottom: var(--spacing-xl);
}

.breadcrumb a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--duration-normal);
}

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

.blog-post-header {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--color-border);
}

/* For individual posts, title is larger */
.blog-post .blog-post-title {
    font-size: var(--font-size-4xl);
}

/* For individual posts, meta is larger */
.blog-post .blog-post-meta {
    font-size: var(--font-size-base);
}

.blog-post-content {
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-lg);
}

.blog-post-content .lead {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: var(--line-height-relaxed);
    font-weight: var(--font-weight-normal);
}

.blog-post-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-top: var(--spacing-3xl);
    margin-bottom: var(--spacing-lg);
}

.blog-post-content h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.blog-post-content h4 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.blog-post-content p {
    margin-bottom: var(--spacing-lg);
}

.blog-post-content ul,
.blog-post-content ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-2xl);
}

.blog-post-content li {
    margin-bottom: var(--spacing-md);
}

.blog-post-content .info-box {
    margin: var(--spacing-xl) 0;
}

/* Demo container for blog posts */
.demo-container {
    width: 100%;
    margin: var(--spacing-2xl) 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.demo-container iframe {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
}

/* Dark mode blog adjustments */
body.dark-mode .blog-post-preview {
    border-bottom-color: var(--color-border);
}

body.dark-mode .blog-post-title a {
    color: var(--color-text);
}

body.dark-mode .blog-post-title a:visited {
    color: var(--color-text);
}

body.dark-mode .blog-post-title a:hover {
    color: var(--color-primary);
}

body.dark-mode .blog-post-header {
    border-bottom-color: var(--color-border);
}

body.dark-mode .blog-post .blog-post-title {
    color: var(--color-text);
}

body.dark-mode .demo-container {
    border-color: var(--color-border);
}