/* Base Reset & Variables */
/* Shadcn Variables (Zinc Theme) */
:root {
    --background: 0 0% 100%;
    --foreground: 240 10% 3.9%;
    --card: 0 0% 100%;
    --card-foreground: 240 10% 3.9%;
    --popover: 0 0% 100%;
    --popover-foreground: 240 10% 3.9%;
    --primary: 240 5.9% 10%;
    --primary-foreground: 0 0% 98%;
    --secondary: 240 4.8% 95.9%;
    --secondary-foreground: 240 5.9% 10%;
    --muted: 240 4.8% 95.9%;
    --muted-foreground: 240 3.8% 46.1%;
    --accent: 240 4.8% 95.9%;
    --accent-foreground: 240 5.9% 10%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 0 0% 98%;
    --border: 240 5.9% 90%;
    --input: 240 5.9% 90%;
    --ring: 240 10% 3.9%;
    --radius: 0.5rem;

    /* Base mappings to existing vars for backward compatibility where needed */
    --bg-color: hsl(var(--background));
    --text-main: hsl(var(--foreground));
    --text-secondary: hsl(var(--muted-foreground));
    --text-muted: hsl(var(--muted-foreground));
    --accent-color: hsl(var(--primary));
    --border-color: hsl(var(--border));
    --bg-secondary: hsl(var(--secondary));

    /* Typography */
    --font-family-sans: 'Inter',
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    --font-family-serif: 'Playfair Display',
        Georgia,
        serif;

    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-md: 1rem;
    /* 16px */
    --font-size-lg: 1.25rem;
    /* 20px */
    --font-size-xl: 1.5rem;
    /* 24px */
    --font-size-2xl: 2rem;
    /* 32px */
    --font-size-3xl: 3.5rem;
    /* 56px */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Layout */
    --container-width: 1200px;
    --header-height: 100px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
}

/* Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border-color: hsl(var(--border));
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
    font-family: var(--font-family-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a.link-underline:hover,
a:not(.btn):hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    color: hsl(var(--foreground));
}

h1 {
    font-size: var(--font-size-3xl);
    letter-spacing: -0.03em;
}

h2 {
    font-size: var(--font-size-2xl);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: var(--font-size-xl);
    letter-spacing: -0.01em;
}

p {
    margin-bottom: var(--spacing-sm);
    color: hsl(var(--muted-foreground));
}

ul,
ol {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    color: hsl(var(--muted-foreground));
}

li {
    margin-bottom: 0.5rem;
}

blockquote {
    border-left: 4px solid hsl(var(--foreground));
    padding-left: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-family: var(--font-family-serif);
    font-style: italic;
    margin: var(--spacing-md) 0;
    color: hsl(var(--foreground));
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.flex {
    display: flex;
    gap: var(--spacing-sm);
}

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

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section {
    padding: var(--spacing-lg) 0;
}

/* Header */
.site-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-medium);
}

.logo {
    font-weight: 700;
    font-size: var(--font-size-lg);
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.site-logo-img {
    height: 24px;
    width: auto;
}

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

.main-nav a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.main-nav a:not(.btn):hover,
.main-nav a:not(.btn).active {
    color: var(--text-main);
}

/* Buttons */
/* Buttons - Shadcn Style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25;
    white-space: nowrap;
    transition: all var(--transition-fast);
    cursor: pointer;
    height: 2.25rem;
    /* h-9 */
    padding: 0 1rem;
    /* px-4 py-2 */
    border: 1px solid transparent;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px hsl(var(--ring)), 0 0 0 4px hsl(var(--background));
}

.btn:disabled {
    pointer-events: none;
    opacity: 0.5;
}

/* Base / Default Button (Primary in Shadcn terms) */
.btn-primary,
.btn-default {
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: none;
}

.btn-primary:hover,
.btn-default:hover {
    background-color: hsl(var(--primary) / 0.9);
    color: hsl(var(--primary-foreground));
    text-decoration: none;
}

/* Secondary Button */
.btn-secondary {
    background-color: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
}

.btn-secondary:hover {
    background-color: hsl(var(--secondary) / 0.8);
    text-decoration: none;
}

/* Outline Button */
.btn-outline {
    border: 1px solid hsl(var(--input));
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
}

.btn-outline:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
    text-decoration: none;
}

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

.btn-ghost:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
    text-decoration: none;
}

/* Link Button */
.btn-link {
    background-color: transparent;
    color: hsl(var(--primary));
    text-underline-offset: 4px;
    padding: 0;
    height: auto;
}

.btn-link:hover {
    text-decoration: underline;
}

.main-nav .btn {
    padding: 0 1rem;
}

/* Hero */
.hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero-title {
    max-width: 800px;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

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

.hero-centered .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
}

/* Actions */
.hero-actions {
    margin-top: var(--spacing-md);
}

/* Work Preview */
.case-studies-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
}

.case-study-card {
    group: hover;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.card-image {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: var(--bg-secondary);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    border-radius: 4px;
    transition: transform var(--transition-medium);
}

.case-study-card:hover .card-image {
    transform: translateY(-4px);
}

.placeholder-bg {
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.placeholder-bg::after {
    content: "Image Placeholder";
    font-size: var(--font-size-sm);
}

.card-content h3 {
    margin-bottom: 0.25rem;
}

.tags {
    margin: 0.5rem 0;
    display: flex;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    padding: 2px 8px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    color: var(--text-secondary);
}

.link-underline {
    display: inline-block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-bottom: 1px solid var(--text-main);
    padding-bottom: 2px;
}

/* Case Study Detail */
.case-study-hero {
    padding-top: var(--spacing-lg);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.case-study-hero .hero-subtitle {
    margin: 0 auto;
}

.case-study-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.meta-item h4 {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.article-content {
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.125rem;
    /* Larger body text for reading */
}

.article-content h2 {
    margin-top: var(--spacing-lg);
    font-size: 1.75rem;
}

.article-content h3 {
    margin-top: var(--spacing-md);
    font-size: 1.5rem;
}

.article-content p {
    margin-bottom: var(--spacing-md);
}

.full-width-image {
    width: 100%;
    margin: var(--spacing-lg) 0;
    background-color: var(--bg-secondary);
}

.image-block {
    width: 100%;
    background-color: var(--bg-secondary);
    border-radius: 4px;
}

.caption {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
    display: block;
}

.case-study-nav {
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.case-study-nav a {
    font-weight: 500;
    font-size: var(--font-size-sm);
}

/* About Section */
.bg-secondary {
    background-color: var(--bg-secondary);
}

.about-text {
    max-width: 800px;
}

/* Blog Preview */
.blog-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

.blog-preview-card {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.blog-preview-card .date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    min-width: 100px;
}

.blog-preview-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin: 0;
    transition: color var(--transition-fast);
}

.blog-preview-card:hover h3 {
    color: var(--text-secondary);
}

/* Forms */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: var(--font-size-md);
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--text-main);
}

/* Footer */
.site-footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.footer-content {
    align-items: flex-start;
}

.footer-logo {
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

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

.footer-socials {
    display: flex;
    gap: var(--spacing-md);
}

.footer-socials a {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Mobile Menu */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    z-index: 1002;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    transition: var(--transition-fast);
}

/* Scroll Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .main-nav {
        /* Override previous display: none if handled by JS logic */
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--bg-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 1001;
        transform: translateY(-100%);
        transition: transform var(--transition-medium);
        display: flex;
    }

    .main-nav.open {
        transform: translateY(0);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .mobile-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .case-studies-grid,
    .grid {
        grid-template-columns: 1fr !important;
    }

    .blog-preview-card {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}