/* ==========================================================================
   BASE & SYSTEM VARIABLES
   ========================================================================== */
:root {
    /* Color Palette (Monochromatic & Sophisticated) */
    --color-bg: #FAF9F6;         /* Premium Off-White */
    --color-text: #2C2C2C;       /* Elegant Ink Black */
    --color-text-light: #666666; /* Subdued Grey */
    --color-accent: #1A1A1A;     /* Pure Dark Slate */
    --color-border: #E2E0D9;     /* Soft Warm Grey Border */
    --color-card-bg: #F4F2EB;    /* Slightly Darker Warm White */

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

    /* Spacing System (8px Grid) */
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-6: 48px;
    --space-12: 96px;

    /* Font Sizes */
    --font-h1: 3.5rem;
    --font-h2: 2.25rem;
    --font-h3: 1.5rem;
    --font-body: 1rem;
    --font-meta: 0.875rem;

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

@media screen and (max-width: 768px) {
    :root {
        --font-h1: 2.25rem;
        --font-h2: 1.75rem;
        --font-h3: 1.25rem;
    }
}

/* ==========================================================================
   RESET & FOUNDATIONS (base.css equivalent with paper grain effect)
   ========================================================================== */
* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: var(--font-body);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* Paper Grain Texture Overlay (Pure URL-Encoded SVG Noise, NO Base64) */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    /* Ultra-light noise filter to emulate physical premium paper */
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

h1, h2, h3 {
    color: var(--color-accent);
    font-family: var(--font-serif);
    font-weight: 400;
}

ul {
    list-style: none;
}

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

button, input, textarea {
    font-family: var(--font-primary);
    font-size: var(--font-body);
}

/* ==========================================================================
   LAYOUT SYSTEM (layout.css equivalent)
   ========================================================================== */
.container {
    max-width: 1120px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-3);
    padding-right: var(--space-3);
}

.grid {
    display: grid;
    gap: var(--space-3);
}

.section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
    border-bottom: none;
}

/* ==========================================================================
   COMPONENTS (components.css equivalent)
   ========================================================================== */
/* Section Title (Left aligned, Magazine style) */
.section-title {
    font-size: var(--font-h2);
    font-family: var(--font-serif);
    margin-bottom: var(--space-6);
    position: relative;
    letter-spacing: -0.5px;
}

/* Base Button (No rounded corners, pure slate) */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: 12px 24px;
    font-size: var(--font-meta);
    font-weight: 500;
    border: 1px solid var(--color-accent);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.button-ghost {
    background-color: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-border);
}

.button-ghost:hover {
    border-color: var(--color-accent);
    background-color: hsla(0, 0%, 10%, 0.03);
}

/* Card Style (Editorial, sharp borders, no shadows) */
.skills-card, .work-card {
    border: 1px solid var(--color-border);
    padding: var(--space-4);
    background-color: var(--color-card-bg);
    transition: border-color var(--transition-fast);
}

.skills-card:hover, .work-card:hover {
    border-color: var(--color-accent);
}

/* ==========================================================================
   SECTIONS (sections.css equivalent)
   ========================================================================== */
/* Header & Navigation */
.header {
    width: 100%;
    background-color: transparent;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.nav {
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: var(--font-h3);
    font-weight: 600;
    letter-spacing: -0.5px;
}

.nav-toggle {
    display: none;
    cursor: pointer;
}

.nav-list {
    display: flex;
    column-gap: var(--space-3);
}

.nav-link {
    font-size: var(--font-meta);
    color: var(--color-text-light);
}

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

/* Scroll header effect */
.scroll-header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

/* Home / Hero (Full-bleed Background Image Overlay Style) */
.home {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    padding-bottom: var(--space-6);
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

.home-visual {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.home-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.home-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(250, 249, 246, 0.78); /* High contrast off-white tint */
    z-index: 2;
}

.home-container {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 720px; /* Highly readable width */
}

.home-subtitle {
    display: block;
    font-size: var(--font-meta);
    color: var(--color-text-light);
    margin-bottom: var(--space-2);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.home-title {
    font-size: var(--font-h1);
    margin-bottom: var(--space-3);
    line-height: 1.1;
    letter-spacing: -1px;
}

.home-description {
    font-size: 1.1rem;
    margin-bottom: var(--space-4);
    color: var(--color-text);
}

.home-buttons {
    display: flex;
    gap: var(--space-2);
}

/* About Section */
.about-content {
    max-width: 720px; /* Restrict body text width */
}

.about-text-lead {
    font-size: 1.25rem;
    font-family: var(--font-serif);
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.about-description {
    margin-bottom: var(--space-4);
}

.about-metrics {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-3);
}

.metric-item {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: var(--font-meta);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-val {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-accent);
}

/* Skills Section */
.skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-3);
}

.skills-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--space-2);
}

.skills-meta {
    font-size: var(--font-meta);
    color: var(--color-text-light);
    margin-bottom: var(--space-2);
    font-family: var(--font-primary);
}

.skills-detail {
    font-size: var(--font-meta);
    line-height: 1.7;
}

/* Works Section */
.work-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-4);
}

.work-card {
    background-color: var(--color-bg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.work-header {
    margin-bottom: var(--space-2);
}

.work-meta {
    font-size: var(--font-meta);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.work-title {
    font-size: 1.3rem;
    margin-top: 4px;
}

.work-desc {
    font-size: var(--font-meta);
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.work-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.work-tech span {
    font-size: 11px;
    background-color: var(--color-card-bg);
    padding: 2px 8px;
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
}

/* Contact Section */
.contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.contact-message {
    margin-bottom: var(--space-4);
}

.contact-detail {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-3);
}

.contact-label {
    font-size: var(--font-meta);
    color: var(--color-text-light);
    text-transform: uppercase;
}

.contact-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-accent);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: var(--font-meta);
    color: var(--color-text-light);
}

.form-input {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 12px;
    color: var(--color-accent);
    outline: none;
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    border-color: var(--color-accent);
}

/* Footer Section */
.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-6) 0;
}

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

.footer-copy {
    font-size: var(--font-meta);
    color: var(--color-text-light);
}

.footer-socials {
    display: flex;
    align-items: center;
    column-gap: var(--space-2);
}

.footer-social {
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.footer-social:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.footer-social svg {
    display: block;
}

/* ==========================================================================
   RESPONSIVE DESIGN (2 breakpoints limit per design guide)
   ========================================================================== */
@media screen and (max-width: 768px) {
    /* Mobile styles */
    .nav-menu {
        position: fixed;
        background-color: var(--color-bg);
        top: -100%;
        left: 0;
        width: 100%;
        padding: 5rem 0 3rem;
        transition: top 0.4s ease;
        border-bottom: 1px solid var(--color-border);
        box-shadow: none;
        z-index: 99; /* Ensure menu stays just below the header (z-index: 100) */
    }

    /* Target state when menu is triggered active */
    .show-menu {
        top: 0 !important;
    }

    .nav-list {
        flex-direction: column;
        row-gap: var(--space-3);
        align-items: center;
    }

    .nav-toggle {
        display: block;
        position: relative;
        width: 24px;
        height: 24px;
        z-index: 101; /* Place above the active menu */
    }

    /* Icon display logic */
    .nav-icon-close {
        display: none;
    }

    .nav-icon-menu, .nav-icon-close {
        position: absolute;
        top: 0;
        left: 0;
        width: 24px;
        height: 24px;
    }

    .active-toggle .nav-icon-menu {
        display: none;
    }

    .active-toggle .nav-icon-close {
        display: block;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .footer-container {
        flex-direction: column;
        row-gap: var(--space-2);
        align-items: flex-start;
    }
}