/* ============================================
   CRAEFTO LAB - Project Documentation Styles
   Infinity Steel Fixers Project
   ============================================ */

:root {
    /* Craefto Color System */
    --color-background: #FAF7F2;
    --color-background-subtle: #F3EDE5;
    --color-background-muted: #EAE4DB;
    --color-foreground: #1A1714;
    --color-foreground-muted: #5C5650;
    --color-foreground-subtle: #847B73;
    --color-accent: hsl(145, 18%, 36%);
    --color-accent-hover: hsl(145, 20%, 28%);
    --color-accent-subtle: hsl(145, 12%, 94%);
    --color-accent-light: hsl(145, 15%, 90%);
    --color-border: #E5DFD6;
    --color-border-subtle: #EBE6DE;
    --color-border-strong: #CCC3B8;
    --color-success: hsl(145, 25%, 38%);
    --color-warning: hsl(35, 55%, 50%);
    --color-error: hsl(5, 45%, 48%);

    /* Typography */
    --font-heading: 'Space Grotesk', system-ui, sans-serif;
    --font-body: 'DM Sans', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* 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;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(26, 23, 20, 0.04), 0 1px 2px rgba(26, 23, 20, 0.06);
    --shadow-md: 0 4px 6px rgba(26, 23, 20, 0.03), 0 2px 4px rgba(26, 23, 20, 0.04);
    --shadow-lg: 0 10px 15px rgba(26, 23, 20, 0.03), 0 4px 6px rgba(26, 23, 20, 0.05);

    /* Transitions */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --duration-fast: 100ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;

    /* Layout */
    --max-width: 900px;
    --max-width-wide: 1200px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-foreground);
    line-height: 1.7;
    min-height: 100vh;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 247, 242, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-foreground);
}

.logo-mark {
    width: 32px;
    height: 23px;
    transition: transform var(--duration-slow) var(--ease-spring);
}

.logo-mark svg {
    width: 100%;
    height: 100%;
}

.logo-mark svg path {
    fill: var(--color-foreground);
    transition: fill var(--duration-normal);
}

.logo:hover .logo-mark {
    transform: scale(1.1) rotate(-5deg);
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
}

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

.nav-link {
    font-size: 0.875rem;
    color: var(--color-foreground-muted);
    text-decoration: none;
    transition: color var(--duration-normal);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link:hover {
    color: var(--color-foreground);
}

.nav-link svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   DOCUMENT HEADER
   ============================================ */

.doc-header {
    padding: calc(80px + var(--space-3xl)) var(--space-xl) var(--space-2xl);
    max-width: var(--max-width);
    margin: 0 auto;
    border-bottom: 1px solid var(--color-border);
}

.doc-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-lg);
}

.doc-eyebrow::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--color-accent);
}

.doc-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
    text-wrap: balance;
}

.doc-subtitle {
    font-size: 1.125rem;
    color: var(--color-foreground-muted);
    max-width: 640px;
}

.doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border-subtle);
}

.doc-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.doc-meta-label {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-foreground-subtle);
}

.doc-meta-value {
    font-weight: 500;
    font-size: 0.9375rem;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.doc-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl) var(--space-4xl);
}

/* Table of Contents */
.toc {
    background: var(--color-background-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.toc-title {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-foreground-muted);
    margin-bottom: var(--space-md);
}

.toc-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-sm);
}

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

.toc-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    width: 2rem;
}

.toc-link {
    color: var(--color-foreground-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--duration-normal);
}

.toc-link:hover {
    color: var(--color-foreground);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

h2 {
    font-size: 1.75rem;
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

h3 {
    font-size: 1.25rem;
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
    color: var(--color-foreground);
}

h4 {
    font-size: 1.0625rem;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-foreground);
}

p {
    margin-bottom: var(--space-md);
    text-wrap: pretty;
}

strong {
    font-weight: 600;
    color: var(--color-foreground);
}

em {
    font-style: italic;
}

/* Links */
a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--duration-normal);
}

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

/* Lists */
ul, ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

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

li::marker {
    color: var(--color-accent);
}

/* Blockquotes */
blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-lg);
    margin: var(--space-xl) 0;
    font-style: italic;
    color: var(--color-foreground-muted);
    background: var(--color-background-subtle);
    padding: var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Code */
code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-background-muted);
    padding: 0.125em 0.375em;
    border-radius: var(--radius-sm);
    color: var(--color-foreground);
}

pre {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    background: var(--color-foreground);
    color: var(--color-background);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--space-xl) 0;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* ============================================
   TABLES
   ============================================ */

.table-wrapper {
    overflow-x: auto;
    margin: var(--space-xl) 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

thead {
    background: var(--color-background-subtle);
}

th {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-foreground-muted);
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

td {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border-subtle);
    vertical-align: top;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background: var(--color-background-subtle);
}

/* Table ID column */
td:first-child {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-accent);
    white-space: nowrap;
}

/* ============================================
   CARDS & CALLOUTS
   ============================================ */

.card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin: var(--space-lg) 0;
}

.card-accent {
    background: var(--color-accent-subtle);
    border-color: transparent;
}

.card-muted {
    background: var(--color-background-subtle);
    border-color: transparent;
}

.callout {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
}

.callout-info {
    background: var(--color-accent-subtle);
    border-left: 3px solid var(--color-accent);
}

.callout-warning {
    background: hsl(35, 55%, 95%);
    border-left: 3px solid var(--color-warning);
}

.callout-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--color-accent);
}

.callout-content {
    flex-grow: 1;
}

.callout-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: var(--space-xs);
}

.callout-text {
    font-size: 0.9375rem;
    color: var(--color-foreground-muted);
    margin: 0;
}

/* ============================================
   BADGES & TAGS
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    background: var(--color-background-subtle);
    color: var(--color-foreground-muted);
}

.badge-accent {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
}

.badge-success {
    background: hsl(145, 25%, 92%);
    color: var(--color-success);
}

.badge-warning {
    background: hsl(35, 55%, 92%);
    color: var(--color-warning);
}

.priority-must {
    background: hsl(145, 25%, 92%);
    color: var(--color-success);
}

.priority-should {
    background: hsl(35, 55%, 92%);
    color: var(--color-warning);
}

.priority-could {
    background: var(--color-background-muted);
    color: var(--color-foreground-subtle);
}

/* ============================================
   GRIDS & LAYOUTS
   ============================================ */

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

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

.stat-box {
    background: var(--color-background-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--color-foreground-muted);
    margin-top: var(--space-xs);
}

/* ============================================
   TIMELINE
   ============================================ */

.timeline {
    position: relative;
    padding-left: var(--space-2xl);
    margin: var(--space-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-2xl) + 4px);
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--color-accent);
    border-radius: 50%;
    border: 2px solid var(--color-background);
}

.timeline-week {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.timeline-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.0625rem;
    margin-bottom: var(--space-sm);
}

.timeline-content {
    color: var(--color-foreground-muted);
    font-size: 0.9375rem;
}

/* ============================================
   CHECKLISTS
   ============================================ */

.checklist {
    list-style: none;
    padding-left: 0;
}

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-subtle);
}

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

.checklist-box {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    margin-top: 2px;
}

/* ============================================
   PRICING OPTIONS
   ============================================ */

.pricing-card {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    margin: var(--space-lg) 0;
    transition: all var(--duration-normal);
}

.pricing-card.recommended {
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.pricing-card .price {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.pricing-card .price-note {
    font-size: 0.875rem;
    color: var(--color-foreground-muted);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--color-foreground);
    color: var(--color-background);
    padding: var(--space-2xl) var(--space-xl);
    margin-top: var(--space-4xl);
}

.footer-inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

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

.footer-logo-mark {
    width: 32px;
    height: 23px;
}

.footer-logo-mark svg {
    width: 100%;
    height: 100%;
}

.footer-logo-mark svg path {
    fill: var(--color-background);
}

.footer-logo-text {
    font-family: var(--font-heading);
    font-weight: 600;
}

.footer-text {
    font-size: 0.875rem;
    color: rgba(250, 247, 242, 0.6);
}

.footer-nav {
    display: flex;
    gap: var(--space-md);
}

.footer-link {
    color: rgba(250, 247, 242, 0.6);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--duration-normal);
}

.footer-link:hover {
    color: var(--color-background);
}

/* ============================================
   NAVIGATION
   ============================================ */

.doc-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.doc-nav-link {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: var(--color-background-subtle);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: all var(--duration-normal);
    flex: 1;
    max-width: 300px;
}

.doc-nav-link:hover {
    background: var(--color-background-muted);
    transform: translateY(-2px);
}

.doc-nav-link.next {
    text-align: right;
    margin-left: auto;
}

.doc-nav-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-foreground-subtle);
}

.doc-nav-title {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-foreground);
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .header,
    .doc-nav,
    .footer {
        display: none;
    }

    .doc-header {
        padding-top: 0;
    }

    body {
        background: white;
        color: black;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

    .table-wrapper {
        overflow: visible;
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .header-inner {
        padding: var(--space-md);
    }

    .doc-header,
    .doc-content {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .doc-title {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.125rem;
    }

    .table-wrapper {
        font-size: 0.875rem;
    }

    th, td {
        padding: var(--space-sm) var(--space-md);
    }

    .toc-list {
        grid-template-columns: 1fr;
    }

    .doc-nav {
        flex-direction: column;
    }

    .doc-nav-link {
        max-width: none;
    }

    .doc-nav-link.next {
        text-align: left;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.doc-content {
    animation: fadeIn 0.5s ease-out;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}