/* ============================================
   DEEP HAUL - MAIN STYLESHEET
   Salvage Solutions Inc. Corporate Portal
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
    /* Primary Palette */
    --color-industrial-yellow: #E89B3F;
    --color-salvage-teal: #33B5A6;
    --color-safety-red: #C1292E;
    --color-gunmetal: #4A4A4A;
    --color-screen-glow: #00FF9D;

    /* Status Colors */
    --color-status-good: #00FF00;
    --color-status-warning: #FFAA00;
    --color-status-critical: #FF0000;

    /* Background & Surface */
    --color-void-black: #0A0C0F;
    --color-hull-dark: #151820;
    --color-hull-mid: #1E2430;
    --color-hull-light: #2A3140;

    /* Text Hierarchy */
    --color-text-primary: #E8ECF0;
    --color-text-secondary: #8A95A5;
    --color-text-muted: #7A8595;
    --color-visor-frost: rgba(229, 240, 245, 0.08);

    /* Glow Effects */
    --glow-teal: 0 0 20px rgba(51, 181, 166, 0.5);
    --glow-yellow: 0 0 20px rgba(232, 155, 63, 0.5);
    --glow-screen: 0 0 30px rgba(0, 255, 157, 0.3);
    --glow-critical: 0 0 20px rgba(255, 0, 0, 0.5);

    /* Typography Scale (1.333 - Perfect Fourth) */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.333rem;
    --font-size-xl: 1.777rem;
    --font-size-2xl: 2.369rem;
    --font-size-3xl: 3.157rem;
    --font-size-4xl: 4.209rem;

    /* Font Families */
    --font-display: 'Orbitron', sans-serif;
    --font-ui: 'Rajdhani', sans-serif;
    --font-data: 'Share Tech Mono', monospace;
    --font-body: 'Exo 2', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Borders */
    --border-width: 1px;
    --border-width-thick: 2px;
    --border-radius-sm: 2px;
    --border-radius-md: 4px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;
}

/* ============================================
   2. CSS RESET & BASE
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background: var(--color-void-black);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scanline Effect (Subtle) */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.1) 2px,
        rgba(0, 0, 0, 0.1) 4px
    );
    pointer-events: none;
    z-index: 9999;
    /* Scanline opacity reduced from style tile (0.3) for production readability */
    opacity: 0.15;
}

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

a {
    color: var(--color-salvage-teal);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-industrial-yellow);
}

ul, ol {
    list-style: none;
}

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

/* Display (Orbitron) - Logo, Major Headers */
.font-display,
h1 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-3xl);
    line-height: 1.1;
}

/* UI (Rajdhani) - Section Headers, Labels */
.font-ui,
h2, h3, h4 {
    font-family: var(--font-ui);
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-text-primary);
}

h2 {
    font-size: var(--font-size-2xl);
    line-height: 1.2;
}

h3 {
    font-size: var(--font-size-xl);
    line-height: 1.3;
}

h4 {
    font-size: var(--font-size-lg);
    line-height: 1.4;
}

/* Data (Share Tech Mono) - Statistics, Readouts */
.font-data {
    font-family: var(--font-data);
    color: var(--color-screen-glow);
}

/* Body (Exo 2) - Paragraphs, Descriptions */
p {
    margin-bottom: var(--space-md);
}

p:last-child {
    margin-bottom: 0;
}

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-teal { color: var(--color-salvage-teal); }
.text-yellow { color: var(--color-industrial-yellow); }
.text-glow { color: var(--color-screen-glow); }

/* ============================================
   4. LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container--narrow {
    max-width: var(--container-narrow);
}

.section {
    padding: var(--space-4xl) 0;
}

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

.grid {
    display: grid;
    gap: var(--space-xl);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid--4,
    .grid--3,
    .grid--2 { grid-template-columns: 1fr; }

    .section {
        padding: var(--space-3xl) 0;
    }
}

/* ============================================
   5. HEADER & NAVIGATION
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 12, 15, 0.95);
    border-bottom: var(--border-width) solid var(--color-hull-light);
    backdrop-filter: blur(10px);
}

.site-header.is-scrolled {
    background: rgba(10, 12, 15, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    max-width: var(--container-max);
    margin: 0 auto;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.site-logo__text {
    font-family: var(--font-display);
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.site-logo__text span {
    color: var(--color-salvage-teal);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.main-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.main-nav__link {
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm) 0;
    position: relative;
}

.main-nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-salvage-teal);
    transition: width var(--transition-base);
}

.main-nav__link:hover {
    color: var(--color-text-primary);
}

.main-nav__link:hover::after {
    width: 100%;
}

.main-nav__link--active {
    color: var(--color-salvage-teal);
}

.main-nav__link--active::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    margin: 5px 0;
    transition: var(--transition-base);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav__list {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-hull-dark);
        border-bottom: var(--border-width) solid var(--color-hull-light);
        padding: var(--space-lg);
        gap: var(--space-md);
        display: none;
    }

    .main-nav__list.is-open {
        display: flex;
    }
}

body.nav-open {
    overflow: hidden;
}

/* ============================================
   6. BUTTONS
   ============================================ */
.btn {
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: var(--space-sm) var(--space-lg);
    border: var(--border-width-thick) solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

/* Primary - Teal Fill */
.btn--primary {
    background: var(--color-salvage-teal);
    color: var(--color-void-black);
    border-color: var(--color-salvage-teal);
}

.btn--primary:hover {
    background: transparent;
    color: var(--color-salvage-teal);
    box-shadow: var(--glow-teal);
}

/* Secondary - Yellow Outline */
.btn--secondary {
    background: transparent;
    color: var(--color-industrial-yellow);
    border-color: var(--color-industrial-yellow);
}

.btn--secondary:hover {
    background: var(--color-industrial-yellow);
    color: var(--color-void-black);
    box-shadow: var(--glow-yellow);
}

/* Danger - Red Outline */
.btn--danger {
    background: transparent;
    color: var(--color-safety-red);
    border-color: var(--color-safety-red);
}

.btn--danger:hover {
    background: var(--color-safety-red);
    color: var(--color-text-primary);
    box-shadow: var(--glow-critical);
}

/* Ghost - Subtle */
.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-hull-light);
}

.btn--ghost:hover {
    color: var(--color-text-primary);
    border-color: var(--color-text-secondary);
}

/* Large Button */
.btn--lg {
    font-size: var(--font-size-base);
    padding: var(--space-md) var(--space-xl);
}

/* ============================================
   7. CARDS & PANELS
   ============================================ */
.card {
    background: var(--color-hull-dark);
    border: var(--border-width) solid var(--color-hull-light);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-salvage-teal);
}

.card--feature {
    border-left: 3px solid var(--color-salvage-teal);
}

.card--feature:hover {
    transform: translateX(4px);
    border-left-color: var(--color-industrial-yellow);
}

.card__icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.card__title {
    font-family: var(--font-ui);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.card__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Panel (larger content block) */
.panel {
    background: var(--color-hull-dark);
    border: var(--border-width) solid var(--color-hull-light);
    padding: var(--space-2xl);
    position: relative;
}

.panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        transparent,
        var(--color-salvage-teal),
        var(--color-industrial-yellow),
        var(--color-salvage-teal),
        transparent
    );
}

/* ============================================
   8. HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-4xl) var(--space-lg);
    padding-top: calc(var(--space-4xl) + 80px); /* Account for fixed header */
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 0%, var(--color-void-black) 70%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero__badge {
    font-family: var(--font-data);
    font-size: var(--font-size-sm);
    color: var(--color-salvage-teal);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-lg);
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(var(--font-size-2xl), 8vw, var(--font-size-4xl));
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--color-industrial-yellow), var(--color-salvage-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-lg);
}

.hero__tagline {
    font-family: var(--font-ui);
    font-size: var(--font-size-xl);
    font-weight: 400;
    color: var(--color-text-secondary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--space-xl);
}

.hero__description {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.7;
}

.hero__cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   9. SECTION HEADERS
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header__badge {
    font-family: var(--font-data);
    font-size: var(--font-size-xs);
    color: var(--color-salvage-teal);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-sm);
    display: block;
}

.section-header__title {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.section-header__subtitle {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   10. S.A.L.L.I. COMPONENTS
   ============================================ */

/* S.A.L.L.I. Quote Block */
.salli-quote {
    background: linear-gradient(135deg, rgba(42, 157, 143, 0.1), transparent);
    border: var(--border-width) solid var(--color-salvage-teal);
    border-left: 4px solid var(--color-salvage-teal);
    padding: var(--space-lg);
    position: relative;
}

.salli-quote__header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.salli-quote__icon {
    width: 28px;
    height: 28px;
    background: var(--color-salvage-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-void-black);
}

.salli-quote__name {
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-salvage-teal);
    letter-spacing: 0.1em;
}

.salli-quote__text {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-style: italic;
}

.salli-quote__stat {
    color: var(--color-screen-glow);
    font-family: var(--font-data);
    font-style: normal;
}

/* ============================================
   11. FAQ COMPONENTS
   ============================================ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.faq-item {
    background: var(--color-hull-dark);
    border: var(--border-width) solid var(--color-hull-light);
    border-left: 3px solid var(--color-salvage-teal);
}

.faq-item__question {
    font-family: var(--font-ui);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    padding: var(--space-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item__question::after {
    content: '+';
    font-family: var(--font-data);
    font-size: var(--font-size-xl);
    color: var(--color-salvage-teal);
    transition: transform var(--transition-base);
}

.faq-item.is-open .faq-item__question::after {
    transform: rotate(45deg);
}

.faq-item__answer {
    padding: 0 var(--space-lg) var(--space-lg);
    display: none;
}

.faq-item.is-open .faq-item__answer {
    display: block;
}

/* ============================================
   12. FOOTER
   ============================================ */
.site-footer {
    background: var(--color-hull-dark);
    border-top: var(--border-width) solid var(--color-hull-light);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.site-footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.site-footer__brand {
    max-width: 300px;
}

.site-footer__logo {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.site-footer__tagline {
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: italic;
    margin-bottom: var(--space-md);
}

.site-footer__heading {
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.site-footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.site-footer__link {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.site-footer__link:hover {
    color: var(--color-salvage-teal);
}

.site-footer__social {
    display: flex;
    gap: var(--space-md);
}

.site-footer__social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-hull-mid);
    border: var(--border-width) solid var(--color-hull-light);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.site-footer__social-link:hover {
    border-color: var(--color-salvage-teal);
    color: var(--color-salvage-teal);
}

.site-footer__bottom {
    padding-top: var(--space-xl);
    border-top: var(--border-width) solid var(--color-hull-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.site-footer__copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.site-footer__legal {
    display: flex;
    gap: var(--space-lg);
}

.site-footer__legal a {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .site-footer__inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .site-footer__brand {
        max-width: none;
    }

    .site-footer__social {
        justify-content: center;
    }

    .site-footer__bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   13. STATUS INDICATORS
   ============================================ */
.status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-hull-mid);
    border-left: 3px solid;
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status--good {
    border-color: var(--color-status-good);
    color: var(--color-status-good);
}

.status--warning {
    border-color: var(--color-status-warning);
    color: var(--color-status-warning);
}

.status--critical {
    border-color: var(--color-status-critical);
    color: var(--color-status-critical);
    animation: pulse-critical 1s infinite;
}

@keyframes pulse-critical {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.status__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 8px currentColor;
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================
   14. FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea {
    width: 100%;
    background: var(--color-hull-mid);
    border: var(--border-width) solid var(--color-hull-light);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    padding: var(--space-md);
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: 2px solid var(--color-salvage-teal);
    outline-offset: 2px;
    border-color: var(--color-salvage-teal);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-checkbox input {
    margin-top: 4px;
    accent-color: var(--color-salvage-teal);
}

/* ============================================
   15. DATA DISPLAY
   ============================================ */
.data-value {
    font-family: var(--font-data);
    color: var(--color-screen-glow);
    text-shadow: var(--glow-screen);
}

.data-value--warning {
    color: var(--color-status-warning);
    text-shadow: 0 0 20px rgba(255, 170, 0, 0.5);
}

.data-value--critical {
    color: var(--color-status-critical);
    text-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

.data-label {
    font-family: var(--font-data);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   16. UTILITY CLASSES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sr-only:focus {
    position: fixed;
    top: var(--space-md);
    left: var(--space-md);
    width: auto;
    height: auto;
    padding: var(--space-sm) var(--space-md);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--color-salvage-teal);
    color: var(--color-void-black);
    font-family: var(--font-ui);
    font-weight: 600;
    z-index: 10000;
}

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

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

/* ============================================
   17. S.A.L.L.I. CHAT WIDGET
   ============================================ */
.salli-widget {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 1001;
}

.salli-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-salvage-teal);
    border: none;
    color: var(--color-void-black);
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--glow-teal);
}

.salli-toggle:hover {
    background: var(--color-industrial-yellow);
    box-shadow: var(--glow-yellow);
}

.salli-toggle.is-hidden {
    display: none;
}

.salli-toggle__icon {
    width: 24px;
    height: 24px;
    background: var(--color-void-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-salvage-teal);
}

.salli-chat {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 380px;
    max-width: calc(100vw - var(--space-xl));
    background: var(--color-hull-dark);
    border: var(--border-width) solid var(--color-salvage-teal);
    display: none;
    flex-direction: column;
    max-height: 500px;
}

.salli-chat.is-open {
    display: flex;
}

.salli-chat__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: linear-gradient(135deg, rgba(42, 157, 143, 0.2), transparent);
    border-bottom: var(--border-width) solid var(--color-hull-light);
}

.salli-chat__title {
    display: flex;
    flex-direction: column;
}

.salli-chat__name {
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-salvage-teal);
    letter-spacing: 0.1em;
}

.salli-chat__subtitle {
    font-family: var(--font-data);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.salli-chat__close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--space-xs);
    line-height: 1;
}

.salli-chat__close:hover {
    color: var(--color-text-primary);
}

.salli-chat__messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-height: 250px;
}

.salli-message {
    padding: var(--space-sm) var(--space-md);
    max-width: 90%;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.salli-message--salli {
    background: linear-gradient(135deg, rgba(42, 157, 143, 0.15), transparent);
    border-left: 3px solid var(--color-salvage-teal);
    color: var(--color-text-primary);
    align-self: flex-start;
}

.salli-message--user {
    background: var(--color-hull-mid);
    border-left: 3px solid var(--color-industrial-yellow);
    color: var(--color-text-secondary);
    align-self: flex-end;
}

.salli-typing {
    display: flex;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    align-self: flex-start;
}

.salli-typing span {
    width: 8px;
    height: 8px;
    background: var(--color-salvage-teal);
    border-radius: 50%;
    animation: typing-bounce 1.4s infinite ease-in-out;
}

.salli-typing span:nth-child(1) { animation-delay: 0s; }
.salli-typing span:nth-child(2) { animation-delay: 0.2s; }
.salli-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
    0%, 80%, 100% { transform: translateY(0); opacity: 0.5; }
    40% { transform: translateY(-6px); opacity: 1; }
}

.salli-chat__form {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: var(--border-width) solid var(--color-hull-light);
}

.salli-chat__input {
    flex: 1;
    background: var(--color-hull-mid);
    border: var(--border-width) solid var(--color-hull-light);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
}

.salli-chat__input:focus {
    outline: none;
    border-color: var(--color-salvage-teal);
}

.salli-chat__send {
    background: var(--color-salvage-teal);
    border: none;
    color: var(--color-void-black);
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.salli-chat__send:hover {
    background: var(--color-industrial-yellow);
}

/* S.A.L.L.I. Widget - BEM Classes (matches salli-widget.js) */
.salli-widget__trigger {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-salvage-teal);
    border: none;
    color: var(--color-void-black);
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--glow-teal);
}

.salli-widget__trigger:hover {
    background: var(--color-industrial-yellow);
    box-shadow: var(--glow-yellow);
}

.salli-widget__trigger-icon {
    width: 28px;
    height: 28px;
    background: var(--color-void-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-salvage-teal);
}

.salli-widget__trigger-label {
    display: none;
}

@media (min-width: 768px) {
    .salli-widget__trigger-label {
        display: inline;
    }
}

.salli-widget.is-open .salli-widget__trigger {
    display: none;
}

.salli-widget__panel {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 380px;
    max-width: calc(100vw - var(--space-xl));
    max-height: 500px;
    background: var(--color-hull-dark);
    border: 2px solid var(--color-salvage-teal);
    display: none;
    flex-direction: column;
    box-shadow: 0 0 30px rgba(42, 157, 143, 0.3);
}

.salli-widget.is-open .salli-widget__panel {
    display: flex;
}

.salli-widget__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: linear-gradient(135deg, rgba(42, 157, 143, 0.2), transparent);
    border-bottom: 1px solid var(--color-hull-light);
}

.salli-widget__header-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.salli-widget__avatar {
    width: 36px;
    height: 36px;
    background: var(--color-salvage-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-void-black);
}

.salli-widget__name {
    display: block;
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-salvage-teal);
    letter-spacing: 0.1em;
}

.salli-widget__status {
    display: block;
    font-family: var(--font-data);
    font-size: var(--font-size-xs);
    color: var(--color-screen-glow);
}

.salli-widget__close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--space-xs);
    line-height: 1;
    transition: color var(--transition-fast);
}

.salli-widget__close:hover {
    color: var(--color-text-primary);
}

.salli-widget__messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-height: 280px;
    max-height: 320px;
}

.salli-widget__message {
    max-width: 85%;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.salli-widget__message--salli {
    align-self: flex-start;
    display: flex;
    gap: var(--space-sm);
}

.salli-widget__message--user {
    align-self: flex-end;
    background: var(--color-hull-mid);
    border-left: 3px solid var(--color-industrial-yellow);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-secondary);
}

.salli-widget__message-avatar {
    width: 24px;
    height: 24px;
    min-width: 24px;
    background: var(--color-salvage-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-void-black);
}

.salli-widget__message-content {
    background: linear-gradient(135deg, rgba(42, 157, 143, 0.15), transparent);
    border-left: 3px solid var(--color-salvage-teal);
    padding: var(--space-sm) var(--space-md);
}

.salli-widget__message-text {
    color: var(--color-text-primary);
    margin: 0;
}

.salli-widget__input-area {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid var(--color-hull-light);
    background: var(--color-hull-mid);
}

.salli-widget__input {
    flex: 1;
    background: var(--color-hull-dark);
    border: 1px solid var(--color-hull-light);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
}

.salli-widget__input:focus {
    outline: none;
    border-color: var(--color-salvage-teal);
}

.salli-widget__input::placeholder {
    color: var(--color-text-muted);
}

.salli-widget__send {
    background: var(--color-salvage-teal);
    border: none;
    color: var(--color-void-black);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.salli-widget__send:hover {
    background: var(--color-industrial-yellow);
}

/* ============================================
   18. PAGE-SPECIFIC: 404
   ============================================ */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-xl);
}

.error-page__code {
    font-family: var(--font-display);
    font-size: clamp(6rem, 20vw, 12rem);
    font-weight: 900;
    color: var(--color-safety-red);
    text-shadow: var(--glow-critical);
    line-height: 1;
    margin-bottom: var(--space-md);
}

.error-page__title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

/* ============================================
   19. CALLOUTS & PLACEHOLDERS
   ============================================ */
.callout {
    background: var(--color-hull-mid);
    border: var(--border-width) dashed var(--color-industrial-yellow);
    padding: var(--space-lg);
    text-align: center;
}

.callout__title {
    font-family: var(--font-ui);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-industrial-yellow);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.callout__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.placeholder-image {
    background: var(--color-hull-mid);
    border: var(--border-width) dashed var(--color-hull-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-family: var(--font-data);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    aspect-ratio: 16/9;
}