/* ==========================================================================
   Croftsware — Styles
   Aesthetic: British sophistication, editorial restraint, understated class
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Palette - Deep navy with warm undertones */
    --color-ink: #1a1f2e;
    --color-ink-light: #2d3548;
    --color-ink-muted: #5a6275;
    --color-stone: #8b919f;
    --color-parchment: #f8f7f4;
    --color-cream: #fdfcfa;
    --color-white: #ffffff;
    --color-border: #e8e6e1;
    --color-border-dark: #d4d1c9;

    /* Accent - Refined burgundy */
    --color-accent: #8b2942;
    --color-accent-hover: #a33350;

    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Sizing */
    --container-max: 1200px;
    --container-padding: clamp(1.5rem, 5vw, 4rem);

    /* Spacing scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 10rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

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

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-ink);
    background-color: var(--color-cream);
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

p {
    margin: 0 0 1.25rem;
}

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

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.header-scrolled {
    background: rgba(253, 252, 250, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 0;
}

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

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

.logo-wordmark {
    height: 32px;
    width: auto;
    transition: opacity var(--transition-fast);
}

.logo:hover .logo-wordmark {
    opacity: 0.7;
}

.logo:focus-visible {
    outline: 2px solid var(--color-ink);
    outline-offset: 4px;
    border-radius: 2px;
}

.header-scrolled .logo-wordmark {
    height: 26px;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-ink-muted);
    letter-spacing: 0.02em;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-ink);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    width: 24px;
    height: 20px;
    justify-content: center;
}

.menu-toggle span {
    display: block;
    height: 1.5px;
    background: var(--color-ink);
    transition: all var(--transition-fast);
}

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

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

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

    .nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
        padding: 6rem var(--space-lg) var(--space-lg);
        background: var(--color-cream);
        border-left: 1px solid var(--color-border);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        z-index: 1001;
    }

    .nav-open {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 1.125rem;
    }

    /* Scroll lock when menu is open */
    body.menu-is-open {
        overflow: hidden;
    }
}

/* Mobile menu backdrop */
.nav-backdrop {
    display: none;
}

@media (max-width: 768px) {
    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(26, 31, 46, 0.4);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-base), visibility var(--transition-base);
        z-index: 999;
    }

    .nav-backdrop.backdrop-visible {
        opacity: 1;
        visibility: visible;
    }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: var(--space-xl);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-3xl) var(--container-padding) var(--space-2xl);
}

.hero-content {
    max-width: 720px;
}

.hero-eyebrow {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-stone);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-ink);
}

.hero-title em {
    font-style: italic;
    color: var(--color-ink-muted);
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-ink-muted);
    max-width: 480px;
    margin-bottom: var(--space-xl);
    text-wrap: balance;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.hero-aside {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding-bottom: var(--space-sm);
}

.credential {
    text-align: right;
    padding-left: var(--space-lg);
    border-left: 1px solid var(--color-border-dark);
}

.credential-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    line-height: 1;
    color: var(--color-ink);
}

.credential-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-stone);
    margin-top: var(--space-xs);
}

@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 8rem;
    }

    .hero-aside {
        flex-direction: row;
        gap: var(--space-xl);
    }

    .credential {
        text-align: left;
        padding-left: var(--space-md);
    }
}

@media (max-width: 480px) {
    .hero-aside {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.875rem 1.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    border-radius: 2px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-ink);
    color: var(--color-white);
    border: 1px solid var(--color-ink);
}

.btn-primary:hover {
    background: var(--color-ink-light);
    border-color: var(--color-ink-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 31, 46, 0.15);
}

.btn-secondary {
    background: transparent;
    color: var(--color-ink);
    border: 1px solid var(--color-border-dark);
}

.btn-secondary:hover {
    border-color: var(--color-ink);
}

/* Light variants for dark sections */
.btn-light.btn-primary {
    background: var(--color-cream);
    color: var(--color-ink);
    border-color: var(--color-cream);
}

.btn-light.btn-primary:hover {
    background: var(--color-white);
    border-color: var(--color-white);
}

.btn-light.btn-secondary {
    color: var(--color-cream);
    border-color: rgba(248, 247, 244, 0.3);
}

.btn-light.btn-secondary:hover {
    border-color: var(--color-cream);
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section {
    padding: var(--space-3xl) 0;
    border-top: 1px solid var(--color-border);
}

.section-alt {
    background: var(--color-parchment);
}

.section-dark {
    background: var(--color-ink);
    color: var(--color-cream);
    border-top-color: var(--color-ink);
}

.section-grid {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-xl);
}

.section-header {
    position: relative;
}

.section-number {
    display: block;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-stone);
    margin-bottom: var(--space-xs);
}

.section-dark .section-number {
    color: var(--color-stone);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 500;
}

.section-content {
    max-width: 720px;
}

.section-content .lead {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.section-content .lead a {
    color: var(--color-accent);
    border-bottom: 1px solid currentColor;
}

.section-content .lead a:hover {
    color: var(--color-accent-hover);
}

.section-content p {
    color: var(--color-ink-muted);
}

.section-dark .section-content p {
    color: rgba(248, 247, 244, 0.7);
}

.section-dark .section-content .lead {
    color: var(--color-cream);
}

@media (max-width: 900px) {
    .section-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about-links {
    margin-top: var(--space-lg);
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-ink);
    border-bottom: 1px solid var(--color-border-dark);
    padding-bottom: 2px;
}

.link-arrow:hover {
    border-color: var(--color-ink);
}

.link-arrow svg {
    transition: transform var(--transition-fast);
}

.link-arrow:hover svg {
    transform: translate(2px, -2px);
}

/* --------------------------------------------------------------------------
   Services
   -------------------------------------------------------------------------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.service {
    padding: var(--space-lg);
    background: var(--color-cream);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-fast);
}

.service:hover {
    border-color: var(--color-border-dark);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--color-ink);
}

.service-desc {
    font-size: 0.95rem;
    color: var(--color-ink-muted);
    margin: 0;
}

@media (max-width: 640px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* --------------------------------------------------------------------------
   Approach
   -------------------------------------------------------------------------- */
.approach-quote {
    margin: 0 0 var(--space-xl);
    padding: 0;
    border-left: 2px solid var(--color-border-dark);
    padding-left: var(--space-lg);
}

.approach-quote p {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.5;
    color: var(--color-ink);
    margin: 0;
}

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

.principle h4 {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-ink);
}

.principle p {
    font-size: 0.9rem;
    margin: 0;
}

@media (max-width: 900px) {
    .approach-principles {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .approach-quote p {
        font-size: 1.25rem;
    }
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-lg) 0;
    background: var(--color-parchment);
    border-top: 1px solid var(--color-border);
}

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

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

.footer-company {
    font-weight: 500;
    color: var(--color-ink);
}

.footer-reg {
    font-size: 0.85rem;
    color: var(--color-stone);
}

.footer-right a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-ink-muted);
}

.footer-right a:hover {
    color: var(--color-ink);
}

@media (max-width: 640px) {
    .footer-inner {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .footer-left {
        flex-direction: column;
        gap: var(--space-xs);
    }
}

/* --------------------------------------------------------------------------
   Utilities & Polish
   -------------------------------------------------------------------------- */

/* Smooth reveal animation */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.hero-aside {
    animation: fadeUp 0.8s ease forwards;
}

.hero-aside {
    animation-delay: 0.2s;
    opacity: 0;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .hero-content,
    .hero-aside {
        animation: none;
        opacity: 1;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Selection styling */
::selection {
    background: var(--color-ink);
    color: var(--color-cream);
}

/* Focus states for accessibility */
:focus-visible {
    outline: 2px solid var(--color-ink);
    outline-offset: 4px;
}

/* External link indicator */
a[target="_blank"]:not(.btn):not(.logo):not(.link-arrow)::after {
    content: '';
    display: inline-block;
    width: 0.7em;
    height: 0.7em;
    margin-left: 0.25em;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 12L12 4M12 4H6M12 4V10' stroke='currentColor' stroke-width='1.5'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    vertical-align: middle;
    opacity: 0.6;
}

/* Smooth scroll padding for fixed header */
html {
    scroll-padding-top: 100px;
}

/* --------------------------------------------------------------------------
   Blog — Listing Page
   -------------------------------------------------------------------------- */
.blog-header {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 10rem var(--container-padding) var(--space-xl);
}

.blog-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
}

.blog-list {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding) var(--space-3xl);
    display: grid;
    gap: var(--space-lg);
    max-width: 720px;
}

.blog-card {
    display: block;
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    background: var(--color-white);
    transition: border-color var(--transition-fast);
}

.blog-card:hover {
    border-color: var(--color-border-dark);
}

.blog-card-title {
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: var(--space-xs);
}

.blog-card-meta {
    font-size: 0.85rem;
    color: var(--color-stone);
    margin-bottom: var(--space-sm);
}

.blog-card-excerpt {
    color: var(--color-ink-muted);
    font-size: 0.95rem;
    margin: 0;
}

/* --------------------------------------------------------------------------
   Blog — Article Page
   -------------------------------------------------------------------------- */
.blog-article {
    max-width: 720px;
    margin: 0 auto;
    padding: 10rem var(--container-padding) var(--space-3xl);
}

.blog-article-header {
    margin-bottom: var(--space-xl);
}

.blog-article-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: var(--space-sm);
}

.blog-article-meta {
    font-size: 0.85rem;
    color: var(--color-stone);
}

.blog-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-ink-muted);
    margin-bottom: var(--space-lg);
}

.blog-back:hover {
    color: var(--color-ink);
}

/* Active nav state for Writing link */
.nav-link-active {
    color: var(--color-ink);
}

.nav-link-active::after {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Blog — Article Content (prose typography)
   -------------------------------------------------------------------------- */
.blog-content h1 {
    font-size: 1.75rem;
    font-weight: 500;
    margin: var(--space-xl) 0 var(--space-md);
}

.blog-content h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin: var(--space-xl) 0 var(--space-md);
}

.blog-content h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: var(--space-lg) 0 var(--space-sm);
}

.blog-content p {
    color: var(--color-ink-muted);
    margin-bottom: 1.25rem;
}

.blog-content a {
    color: var(--color-accent);
    border-bottom: 1px solid currentColor;
}

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

.blog-content em {
    font-style: italic;
}

.blog-content strong {
    font-weight: 600;
    color: var(--color-ink);
}

.blog-content blockquote {
    margin: var(--space-lg) 0;
    padding: 0;
    padding-left: var(--space-lg);
    border-left: 2px solid var(--color-border-dark);
}

.blog-content blockquote p {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-style: italic;
    line-height: 1.5;
    color: var(--color-ink);
}

.blog-content aside {
    margin: var(--space-lg) 0;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-parchment);
    border-left: 3px solid var(--color-border-dark);
    font-size: 0.95rem;
}

.blog-content aside p {
    margin: 0;
    color: var(--color-ink-muted);
}

.blog-content aside strong {
    color: var(--color-ink);
}

.blog-content ul,
.blog-content ol {
    color: var(--color-ink-muted);
    margin: 0 0 1.25rem;
    padding-left: 1.5rem;
}

.blog-content li {
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .blog-header {
        padding-top: 7rem;
    }

    .blog-article {
        padding-top: 7rem;
    }
}