/* ===== CSS VARIABLES ===== */
:root {
    /* Colors - Warm Taupe Theme (Dark) */
    --bg-primary: #1c1917;
    --bg-secondary: #38322e;
    --bg-tertiary: #534b46;
    --text-primary: #f3f2f1;
    --text-secondary: #b9b1ac;
    --accent: #c15d3e;
    --accent-tint: rgba(193, 93, 62, 0.15);
    --white: #f3f2f1;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-md: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 2rem;
    --fs-4xl: 2.5rem;
    --fs-5xl: 3.5rem;
    --fs-6xl: 4.5rem;

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

    /* Layout */
    --max-width: 1100px;
    --nav-height: 70px;
    --border-radius: 4px;

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

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-sans);
    font-size: var(--fs-md);
    line-height: 1.6;
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

/* ===== NAVIGATION ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(28, 25, 23, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    transition: transform var(--transition-normal);
    border-bottom: 1px solid var(--bg-tertiary);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: var(--fs-xl);
    font-weight: 600;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

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

.nav-number {
    color: var(--accent);
    margin-right: 0.25rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--accent);
    transition: all var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--nav-height);
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: calc(100vh - var(--nav-height));
    background-color: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    transition: right var(--transition-normal);
    z-index: 99;
}

.mobile-menu.active {
    right: 0;
}

.mobile-link {
    font-family: var(--font-mono);
    font-size: var(--fs-lg);
    color: var(--text-primary);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
}

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

.hero-greeting {
    font-family: var(--font-mono);
    font-size: var(--fs-md);
    color: var(--accent);
    margin-bottom: var(--space-sm);
}

.hero-name {
    font-size: clamp(var(--fs-4xl), 8vw, var(--fs-6xl));
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: var(--space-xs);
}

.hero-tagline {
    font-size: clamp(var(--fs-3xl), 5vw, var(--fs-5xl));
    font-weight: 600;
    color: var(--text-secondary);
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

.hero-description {
    max-width: 540px;
    font-size: var(--fs-lg);
    margin-bottom: var(--space-xl);
}

.hero-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    color: var(--text-primary);
    padding: var(--space-xs);
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent), var(--bg-tertiary));
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--space-3xl) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-container {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.section-container.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: var(--fs-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--bg-tertiary);
    max-width: 300px;
}

.section-number {
    font-family: var(--font-mono);
    font-size: var(--fs-lg);
    font-weight: 400;
    color: var(--accent);
}

/* ===== ABOUT SECTION ===== */
.about-content {
    display: grid;
    gap: var(--space-xl);
}

.about-text p {
    margin-bottom: var(--space-md);
    font-size: var(--fs-lg);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-text strong {
    color: var(--text-primary);
}

.about-text em {
    color: var(--accent);
    font-style: normal;
    font-weight: 500;
}

/* ===== WORK SECTION ===== */
.work-subsection {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
    margin-top: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.work-subsection:first-of-type {
    margin-top: 0;
}

.work-subsection-tag {
    font-size: var(--fs-xs);
    color: var(--accent);
    background-color: var(--accent-tint);
    padding: 0.15rem 0.5rem;
    border-radius: var(--border-radius);
    text-transform: none;
    letter-spacing: normal;
    font-weight: 500;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

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

.project-card {
    background-color: #2a2521;
    border-radius: var(--border-radius);
    padding: 0;
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-top: 2px solid var(--accent);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.project-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    transition: transform var(--transition-normal);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-image-placeholder {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-image-placeholder svg {
    opacity: 0.3;
}

.project-body {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-card:hover {
    transform: translateY(-5px);
    background-color: #332e29;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(193, 93, 62, 0.15);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-xs);
}

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

.project-external {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.project-external:hover {
    color: var(--accent);
}

.project-tag {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--accent);
    background-color: var(--accent-tint);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
}

.project-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    transition: color var(--transition-fast);
}

.project-card:hover .project-title {
    color: var(--accent);
}

.project-type {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--accent);
    margin-bottom: var(--space-sm);
}

.project-description {
    font-size: var(--fs-sm);
    flex-grow: 1;
    margin-bottom: var(--space-sm);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.project-tech li {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-secondary);
}

.project-cta {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: var(--accent);
    margin-top: var(--space-xs);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.project-cta::after {
    content: '\2192';
    transition: transform var(--transition-fast);
}

.project-card:hover .project-cta::after {
    transform: translateX(5px);
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

.skill-category {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
}

.skill-category-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--accent);
    margin-bottom: var(--space-md);
    font-family: var(--font-mono);
}

.skill-list li {
    font-size: var(--fs-sm);
    color: var(--text-secondary);
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
}

.skill-list li::before {
    content: '\25B8';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: var(--fs-xs);
}

/* ===== CONTACT SECTION ===== */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-xl);
}

.contact-button {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--fs-md);
    color: var(--accent);
    background-color: transparent;
    border: 1px solid var(--accent);
    padding: var(--space-sm) var(--space-xl);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.contact-button:hover {
    background-color: var(--accent-tint);
}

.contact-links {
    margin-top: var(--space-xl);
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.contact-links a {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--text-secondary);
}

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

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-secondary);
}

.footer p {
    margin-bottom: var(--space-xs);
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(28, 25, 23, 0.85);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: var(--space-md);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: #f3f2f1;
    border-radius: var(--border-radius);
    max-width: 1100px;
    max-height: 90vh;
    width: 100%;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-close {
    position: sticky;
    top: var(--space-md);
    float: right;
    margin: var(--space-md);
    background: none;
    border: none;
    color: #6f645d;
    cursor: pointer;
    padding: var(--space-xs);
    z-index: 10;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: #c15d3e;
}

.modal-content {
    padding: var(--space-xl);
    padding-top: 0;
    clear: both;
}

/* ===== CASE STUDY STYLES ===== */
.case-study {
    color: #534b46;
}

.case-study-header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid #d1cbc7;
}

.case-study-type {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: #c15d3e;
    display: block;
    margin-bottom: var(--space-sm);
}

.case-study-title {
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: #1c1917;
    margin-bottom: var(--space-sm);
}

.case-study-subtitle {
    font-size: var(--fs-lg);
    max-width: 600px;
}

.case-study-links {
    margin-top: var(--space-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.case-study-link {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: #c15d3e;
    background-color: transparent;
    border: 1px solid #c15d3e;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.case-study-link:hover {
    background-color: rgba(193, 93, 62, 0.1);
}

.case-study-section {
    margin-bottom: var(--space-xl);
}

.case-study-section h2 {
    font-size: var(--fs-xl);
    font-weight: 600;
    color: #1c1917;
    margin-bottom: var(--space-md);
}

.case-study-section h3 {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: #38322e;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.case-study-section h4 {
    font-size: var(--fs-md);
    font-weight: 600;
    color: #c15d3e;
    margin-bottom: var(--space-xs);
}

.case-study-section p {
    margin-bottom: var(--space-md);
}

.case-study-section ul, .case-study-section ol {
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

.case-study-section li {
    margin-bottom: var(--space-xs);
    position: relative;
}

.case-study-section ul li::before {
    content: '\25B8';
    position: absolute;
    left: calc(-1 * var(--space-md));
    color: #c15d3e;
    font-size: var(--fs-xs);
}

.case-study-section ol {
    list-style: decimal;
}

.case-study-section strong {
    color: #1c1917;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.feature-item {
    background-color: #ffffff;
    padding: var(--space-md);
    border-radius: var(--border-radius);
    border: 1px solid #e8e5e3;
}

.feature-item h4 {
    margin-bottom: var(--space-xs);
}

.feature-item p {
    font-size: var(--fs-sm);
    margin-bottom: 0;
}

/* Collapsible Sections */
.collapsible .collapsible-header {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid #d1cbc7;
}

.collapsible .collapsible-header svg {
    transition: transform var(--transition-fast);
}

.collapsible.open .collapsible-header svg {
    transform: rotate(180deg);
}

.collapsible .collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.collapsible.open .collapsible-content {
    max-height: 2000px;
    padding-top: var(--space-md);
}

/* Case Study Images */
.case-study-images {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid #d1cbc7;
}

.case-study-images h3 {
    font-size: var(--fs-lg);
    color: #1c1917;
    margin-bottom: var(--space-md);
}

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

.image-grid img {
    border-radius: var(--border-radius);
    border: 1px solid #d1cbc7;
    transition: transform var(--transition-fast);
}

.image-grid img:hover {
    transform: scale(1.02);
}

.image-single {
    max-width: 100%;
}

.image-single img {
    width: 100%;
    border-radius: var(--border-radius);
    border: 1px solid #d1cbc7;
}

/* Compact Case Study (embedded presentations) */
.case-study--compact .case-study-header {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
}

.case-study-meta {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: var(--space-xs);
}

.case-study--compact .case-study-type {
    display: inline;
    margin-bottom: 0;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.case-study-date {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: #6f645d;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.case-study-date::before {
    content: '\00b7';
    margin: 0 0.6rem;
    color: #b9b1ac;
}

.case-study-blurb {
    font-size: var(--fs-md);
    line-height: 1.6;
    color: #534b46;
}

.case-study-embed {
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid #d1cbc7;
    background: #fff;
}

.case-study-embed iframe {
    width: 100%;
    height: 65vh;
    border: none;
    display: block;
}

.case-study-status {
    text-align: center;
    padding: var(--space-xl);
    background: #f8f7f6;
    border-radius: var(--border-radius);
    border: 1px dashed #d1cbc7;
}

.case-study-status p {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: #6f645d;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: var(--space-xl) var(--space-md);
    }

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

    .section-title::after {
        max-width: 100px;
    }

    .projects-grid,
    .projects-grid--enterprise {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: var(--space-md);
    }

    .case-study-title {
        font-size: var(--fs-2xl);
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: var(--fs-3xl);
    }

    .hero-tagline {
        font-size: var(--fs-2xl);
    }

    .hero-description {
        font-size: var(--fs-md);
    }

    .project-card {
        padding: var(--space-md);
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ===== SELECTION ===== */
::selection {
    background-color: var(--accent-tint);
    color: var(--accent);
}

/* ===== FOCUS STYLES ===== */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.hero-greeting { animation-delay: 0.1s; }
.hero-name { animation-delay: 0.2s; }
.hero-tagline { animation-delay: 0.3s; }
.hero-description { animation-delay: 0.4s; }
.hero-links { animation-delay: 0.5s; }