/* ============================================
   Refined Element Design System
   Dark-themed, Apple-inspired professional design
   ============================================ */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Color Palette */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #1a1a2e;
    --color-bg-tertiary: #16213e;
    --color-bg-elevated: #252540;

    --color-accent-lime: #D6F08D;
    --color-accent-lime-hover: #c4de7b;
    --color-accent-lime-rgb: 214, 240, 141;

    --color-bitcoin-orange: #F7931A;
    --color-bitcoin-orange-hover: #e5820f;

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-text-tertiary: #707080;
    --color-text-inverse: #1a1a2e;

    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-focus: rgba(214, 240, 141, 0.5);

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f1419 100%);
    --gradient-card: linear-gradient(145deg, rgba(37, 37, 64, 0.8) 0%, rgba(26, 26, 46, 0.8) 100%);
    --gradient-accent: linear-gradient(90deg, var(--color-accent-lime) 0%, #afd66d 100%);
    --gradient-bitcoin: linear-gradient(90deg, var(--color-bitcoin-orange) 0%, #ffa726 100%);

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Roboto Mono', 'Fira Code', Consolas, 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-size-5xl: 3rem;        /* 48px */
    --font-size-6xl: 3.75rem;     /* 60px */

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.2;
    --line-height-base: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.5rem;    /* 24px */
    --space-6: 2rem;      /* 32px */
    --space-8: 3rem;      /* 48px */
    --space-10: 4rem;     /* 64px */
    --space-12: 6rem;     /* 96px */
    --space-16: 8rem;     /* 128px */

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(214, 240, 141, 0.3);

    /* Border Radius */
    --radius-sm: 0.375rem;  /* 6px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* Breakpoints (for reference in JS) */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;
}

/* ============================================
   Global Reset & Base Styles
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-system);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: var(--space-4);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-3xl);
}

h4 {
    font-size: var(--font-size-2xl);
}

h5 {
    font-size: var(--font-size-xl);
}

h6 {
    font-size: var(--font-size-lg);
}

p {
    margin-top: 0;
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-accent-lime);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

strong, b {
    font-weight: var(--font-weight-semibold);
}

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 0.125rem 0.375rem;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-accent-lime);
}

pre {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    padding: var(--space-4);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin-bottom: var(--space-4);
}

pre code {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--color-text-primary);
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.site-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.site-logo img {
    height: 30px;
    width: auto;
}

.site-logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: color var(--transition-fast);
    border-radius: var(--radius-md);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Dropdown Navigation */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    cursor: pointer;
}

.nav-dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: var(--space-1);
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform var(--transition-fast);
}

.nav-dropdown:hover .nav-dropdown-toggle::after {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    margin-top: var(--space-2);
    padding: var(--space-2);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-dropdown-item:hover {
    color: var(--color-text-primary);
    background-color: rgba(214, 240, 141, 0.1);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-2);
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle-bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

@media (max-width: 991px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background-color: var(--color-bg-secondary);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-4);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

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

    .nav-dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-top: var(--space-2);
        margin-left: var(--space-4);
    }
}

/* ============================================
   Breadcrumb Navigation
   ============================================ */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: var(--space-4);
}

.breadcrumb-item a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--color-accent-lime);
}

.breadcrumb-item.active {
    color: var(--color-text-primary);
}

/* Make breadcrumb dividers visible on dark backgrounds */
.breadcrumb-item + .breadcrumb-item::before {
    color: var(--color-text-secondary);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    padding: var(--space-16) var(--space-6);
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(214, 240, 141, 0.05) 0%, transparent 50%),
                      radial-gradient(circle at 80% 80%, rgba(247, 147, 26, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    margin-bottom: var(--space-6);
    padding-bottom: 0.1em;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-lime) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

@media (max-width: 767px) {
    .hero {
        padding: var(--space-12) var(--space-4);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-system);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

/* Primary Button (Lime Green) */
.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--color-accent-lime-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-2px);
    color: var(--color-text-inverse);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Secondary Button (Bitcoin Orange) */
.btn-secondary {
    background: var(--gradient-bitcoin);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--color-bitcoin-orange-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    color: var(--color-text-primary);
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--color-accent-lime);
    color: var(--color-accent-lime);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-base);
    height: 100%;
}

.card:hover {
    border-color: rgba(214, 240, 141, 0.3);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-4);
    color: var(--color-accent-lime);
}

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.card-description {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-accent-lime);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: var(--space-3);
    color: var(--color-accent-lime-hover);
}

.card-link::after {
    content: '→';
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

@media (max-width: 767px) {
    .card-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--space-12) var(--space-6);
}

.section-dark {
    background-color: var(--color-bg-secondary);
}

.section-elevated {
    background-color: var(--color-bg-tertiary);
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-10);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-eyebrow {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent-lime);
    margin-bottom: var(--space-3);
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ============================================
   Features Grid
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.feature-item {
    text-align: center;
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    padding: var(--space-4);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    color: var(--color-accent-lime);
}

.feature-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-3);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

/* ============================================
   Pricing Tables
   ============================================ */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.pricing-card {
    background: var(--gradient-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card.featured {
    border-color: var(--color-accent-lime);
    box-shadow: var(--shadow-glow);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-4);
    background: var(--gradient-accent);
    color: var(--color-text-inverse);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    border-radius: var(--radius-full);
}

.pricing-name {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-3);
}

.pricing-price {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-lime);
    margin-bottom: var(--space-2);
}

.pricing-price-currency {
    font-size: var(--font-size-2xl);
}

.pricing-period {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-6);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-6) 0;
    text-align: left;
}

.pricing-features li {
    padding: var(--space-3) 0;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: '✓';
    color: var(--color-accent-lime);
    font-weight: var(--font-weight-bold);
    margin-right: var(--space-3);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-12) var(--space-6) var(--space-6);
    position: relative;
    overflow: hidden;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-column h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent-lime);
}

.footer-bottom {
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-copyright {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
}

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.footer-social a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-xl);
    transition: color var(--transition-fast);
}

.footer-social a:hover {
    color: var(--color-accent-lime);
}

@media (max-width: 767px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

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

.text-gradient {
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-lime) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-hero {
    background: var(--gradient-hero);
}

.bg-gradient-card {
    background: var(--gradient-card);
}

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }
.mt-12 { margin-top: var(--space-12); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-10 { margin-bottom: var(--space-10); }
.mb-12 { margin-bottom: var(--space-12); }

/* ============================================
   Form Elements
   ============================================ */
input,
textarea,
select {
    font-family: var(--font-system);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-tertiary);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-accent-lime);
    box-shadow: 0 0 0 3px rgba(var(--color-accent-lime-rgb), 0.2);
}

/* Form labels */
label {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-2);
    display: block;
}

/* Form control class for Bootstrap compatibility */
.form-control {
    color: var(--color-text-primary);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
}

.form-control:focus {
    color: var(--color-text-primary);
    background-color: var(--color-bg-elevated);
    border-color: var(--color-accent-lime);
    box-shadow: 0 0 0 3px rgba(var(--color-accent-lime-rgb), 0.2);
}

.form-control::placeholder {
    color: var(--color-text-tertiary);
}

.form-select {
    color: var(--color-text-primary);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
}

.form-select:focus {
    color: var(--color-text-primary);
    background-color: var(--color-bg-elevated);
    border-color: var(--color-accent-lime);
    box-shadow: 0 0 0 3px rgba(var(--color-accent-lime-rgb), 0.2);
}

.form-label {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   Content Areas
   ============================================ */
.content,
.article-content,
.page-content,
main {
    color: var(--color-text-secondary);
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6,
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6,
.page-content h1,
.page-content h2,
.page-content h3,
.page-content h4,
.page-content h5,
.page-content h6 {
    color: var(--color-text-primary);
}

.content p,
.article-content p,
.page-content p {
    color: var(--color-text-secondary);
}

.content a,
.article-content a,
.page-content a {
    color: var(--color-accent-lime);
}

.content a:hover,
.article-content a:hover,
.page-content a:hover {
    color: var(--color-accent-lime-hover);
}

/* Lists in content areas */
.content ul,
.content ol,
.article-content ul,
.article-content ol,
.page-content ul,
.page-content ol {
    color: var(--color-text-secondary);
}

.content li,
.article-content li,
.page-content li {
    color: var(--color-text-secondary);
}

/* Tables in dark theme */
table {
    color: var(--color-text-secondary);
}

th {
    color: var(--color-text-primary);
}

td {
    color: var(--color-text-secondary);
}

/* Blockquotes */
blockquote {
    color: var(--color-text-secondary);
    border-left: 4px solid var(--color-accent-lime);
    padding-left: var(--space-4);
    margin: var(--space-4) 0;
    font-style: italic;
}

/* ============================================
   Bootstrap Dark Theme Overrides
   ============================================ */
/* Cards */
.card {
    color: var(--color-text-secondary);
}

.card-body {
    color: var(--color-text-secondary);
}

.card-title {
    color: var(--color-text-primary);
}

.card-text {
    color: var(--color-text-secondary);
}

/* Accordion */
.accordion {
    --bs-accordion-bg: var(--color-bg-secondary);
    --bs-accordion-color: var(--color-text-primary);
    --bs-accordion-border-color: var(--color-border);
}

.accordion-item {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.accordion-button {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.accordion-button:not(.collapsed) {
    background-color: var(--color-bg-elevated);
    color: var(--color-text-primary);
}

.accordion-button::after {
    filter: invert(1);
}

.accordion-body {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-secondary);
}

/* Modal */
.modal-content {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.modal-header {
    border-color: var(--color-border);
}

.modal-footer {
    border-color: var(--color-border);
}

.modal-title {
    color: var(--color-text-primary);
}

/* List groups */
.list-group-item {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border);
    color: var(--color-text-secondary);
}

/* Alerts - override for dark theme visibility */
.alert {
    border: 1px solid transparent;
}

/* Text utilities */
.text-muted {
    color: var(--color-text-tertiary) !important;
}

.text-body {
    color: var(--color-text-primary) !important;
}

/* Small text */
small,
.small {
    color: var(--color-text-secondary);
}

/* HR */
hr {
    border-color: var(--color-border);
    opacity: 1;
}

/* Figure captions */
figcaption {
    color: var(--color-text-tertiary);
}

/* Definition lists */
dt {
    color: var(--color-text-primary);
}

dd {
    color: var(--color-text-secondary);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* ============================================
   Responsive Typography
   ============================================ */
@media (max-width: 991px) {
    h1 {
        font-size: var(--font-size-4xl);
    }

    h2 {
        font-size: var(--font-size-3xl);
    }

    h3 {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 767px) {
    h1 {
        font-size: var(--font-size-3xl);
    }

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

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