/* ===================================
   CSS Variables & Design System
   =================================== */
:root {
    /* Colors - Warm coral palette (Monzo-inspired) */
    --color-primary: #FF7F6E;
    --color-primary-hover: #FF6B57;
    --color-accent: #FF9B8E;
    --color-accent-muted: rgba(255, 127, 110, 0.5);

    /* Deeper, darker neutrals */
    --color-bg-dark: #050708;
    --color-bg-darker: #020303;
    --color-bg-card: #0a0c0f;
    --color-text-primary: #E8EDF2;
    --color-text-secondary: #8B95A5;
    --color-text-muted: #5B6370;
    --color-border: #151a20;

    /* Code/technical colors */
    --color-code: #FF9B8E;
    --color-code-bg: #0d1117;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;

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

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(5, 7, 8, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 20px;
    height: 1.5px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.7;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-text h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.03em;
}

.hero-role {
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.hero-bio {
    font-size: 1.3125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    line-height: 1.75;
}

.hero-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.hero-links a {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.hero-links a:hover {
    color: var(--color-primary);
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    padding: var(--spacing-xl) 0;
}

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

.experience-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.experience-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.experience-meta {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.experience-company {
    color: var(--color-text-primary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.experience-period {
    font-size: 0.8125rem;
}

.experience-content h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.experience-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.experience-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
}

.tag {
    padding: 0.25rem 0.625rem;
    background: var(--color-code-bg);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* ===================================
   Writing Section
   =================================== */
.writing {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-darker);
}

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

.article-card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    text-decoration: none;
}

.article-card:hover {
    border-color: var(--color-accent-muted);
    transform: translateY(-2px);
}

.article-content h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.article-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.article-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

/* ===================================
   Tech Stack Section
   =================================== */
.tech-stack {
    padding: var(--spacing-xl) 0;
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.tech-category h3 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-item {
    padding: 0.375rem 0.75rem;
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-darker);
}

.about-content {
    max-width: 700px;
}

.about-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
    line-height: 1.8;
}

.about-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.about-detail h4 {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.about-detail p {
    color: var(--color-text-primary);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
}

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

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.contact-links a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

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

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--color-bg-darker);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-normal);
        pointer-events: none;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        margin: 0 auto;
        width: 140px;
        height: 140px;
    }

    .hero-bio {
        margin: 0 auto;
    }

    .hero-links {
        justify-content: center;
    }

    .experience-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .article-card {
        grid-template-columns: 1fr;
    }

    .article-meta {
        align-items: flex-start;
        flex-direction: row;
        gap: var(--spacing-sm);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-text h1 {
        font-size: 2rem;
    }
}

/* ===================================
   Animations
   =================================== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease-out;
}

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