/* ==========================================================================
   Tiny Bits - Slate / Charcoal Colour Scheme (Cards Variant, Lively)
   ========================================================================== */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@400;500;600&display=swap');

/* --- Custom Properties --- */
:root {
    --color-primary: #1e1a18;       /* deeper warm charcoal */
    --color-primary-light: #352e2b;  /* lighter charcoal */
    --color-accent: #c44e22;        /* vibrant terracotta/rust */
    --color-accent-light: #e06a3a;  /* vibrant lighter terracotta */
    --color-bg: #e8e3dc;            /* warm grey */
    --color-bg-alt: #dbd4ca;        /* deeper warm grey */
    --color-text: #1c1816;          /* deep rich brown-black */
    --color-text-muted: #544b45;    /* darker warm medium gray */
    --color-text-light: #7e746c;    /* darker warm light gray */
    --color-rule: #c4bab0;          /* darker warm gray rule */
    --color-rule-dark: #a89e94;     /* darker warm gray rule */
    --color-white: #f0ebe4;

    --font-mono: 'IBM Plex Mono', 'Menlo', 'Consolas', monospace;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --max-width: 1120px;
    --spacing-unit: 8px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

/* --- Container --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

@media (min-width: 768px) {
    .container {
        padding: 0 calc(var(--spacing-unit) * 5);
    }
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-rule);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand a {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    transition: color 0.2s ease;
}

.nav-brand a:hover {
    color: var(--color-primary-light);
}

/* Hamburger Toggle */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 1px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Nav Menu */
.nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-rule);
    padding: calc(var(--spacing-unit) * 2) 0;
    flex-direction: column;
}

.nav-menu.active {
    display: flex;
}

.nav-menu li a {
    display: block;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
    transition: color 0.2s ease;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--color-primary);
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        flex-direction: row;
        gap: calc(var(--spacing-unit) * 4);
        border-bottom: none;
        padding: 0;
        background: transparent;
    }

    .nav-menu li a {
        padding: 0;
    }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
    padding: calc(var(--spacing-unit) * 20) 0 calc(var(--spacing-unit) * 14);
    background-color: var(--color-bg);
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-accent);
    letter-spacing: 0.03em;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.hero h1 {
    font-family: var(--font-body);
    font-size: clamp(2.4rem, 5.5vw, 3.8rem);
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.15;
    letter-spacing: -0.03em;
    max-width: 860px;
}

.hero-rule {
    width: 48px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light), var(--color-accent));
    background-size: 200% 100%;
    margin: calc(var(--spacing-unit) * 4) 0;
    animation: ruleShimmer 3s ease-in-out infinite;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 560px;
    line-height: 1.6;
}

/* ==========================================================================
   Section Shared
   ========================================================================== */
.section-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

/* ==========================================================================
   Philosophy / Values
   ========================================================================== */
.philosophy {
    padding: calc(var(--spacing-unit) * 12) 0;
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-rule);
    border-bottom: 1px solid var(--color-rule);
}

.section-header {
    max-width: 840px;
    margin-bottom: calc(var(--spacing-unit) * 8);
}

.section-header h2 {
    font-family: var(--font-body);
    font-size: clamp(1.3rem, 2.8vw, 1.65rem);
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
    letter-spacing: -0.01em;
}

.section-header h2 .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.section-header h2 .word.visible {
    opacity: 1;
    transform: translateY(0);
}

.values-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 5);
}

@media (min-width: 768px) {
    .values-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: calc(var(--spacing-unit) * 6);
    }
}

.value-card {
    padding: calc(var(--spacing-unit) * 3.5) calc(var(--spacing-unit) * 3.5) calc(var(--spacing-unit) * 4);
    background-color: var(--color-white);
    border: 1px solid var(--color-rule);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.02);
    transition: box-shadow 0.4s ease, transform 0.4s ease, border-color 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
}

.value-card.revealed {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.value-card:nth-child(1).revealed { transition-delay: 0s; }
.value-card:nth-child(2).revealed { transition-delay: 0.15s; }
.value-card:nth-child(3).revealed { transition-delay: 0.3s; }

.value-card:hover {
    box-shadow: 0 4px 12px rgba(196, 78, 34, 0.12), 0 12px 32px rgba(0, 0, 0, 0.06);
    transform: translateY(-4px);
    border-color: var(--color-accent-light);
}

.value-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-light);
    letter-spacing: 0.05em;
}

.value-rule {
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    margin: calc(var(--spacing-unit) * 2) 0 calc(var(--spacing-unit) * 3);
    transition: width 0.5s ease 0.3s;
}

.value-card.revealed .value-rule {
    width: 32px;
}

.value-card h3 {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    letter-spacing: -0.01em;
}

.value-card p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ==========================================================================
   Approach / What We Do
   ========================================================================== */
.approach {
    padding: calc(var(--spacing-unit) * 12) 0;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.approach.revealed {
    opacity: 1;
    transform: translateY(0);
}

.approach-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 5);
}

@media (min-width: 768px) {
    .approach-layout {
        grid-template-columns: 1fr 1.2fr;
        gap: calc(var(--spacing-unit) * 10);
        align-items: start;
    }
}

.approach-left h2 {
    font-family: var(--font-body);
    font-size: clamp(1.4rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.35;
    letter-spacing: -0.02em;
}

.approach-right p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.75;
    margin-bottom: calc(var(--spacing-unit) * 2.5);
}

.text-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.01em;
    padding-bottom: 2px;
    border-bottom: 1px solid var(--color-accent-light);
    transition: color 0.2s ease, border-color 0.2s ease;
    margin-top: calc(var(--spacing-unit) * 1);
}

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

/* ==========================================================================
   CTA
   ========================================================================== */
.cta {
    padding: calc(var(--spacing-unit) * 10) 0;
    border-top: 1px solid var(--color-rule);
}

.cta-inner {
    text-align: center;
}

.cta-mark {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    color: var(--color-rule-dark);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.cta-text {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.cta-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-white);
    background-color: var(--color-primary);
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 4);
    border-radius: 4px;
    letter-spacing: 0.02em;
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-link:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(196, 78, 34, 0.25);
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    background-color: #1e1e1e;
    color: var(--color-bg);
    padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 5);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 5);
    padding-bottom: calc(var(--spacing-unit) * 5);
    border-bottom: 1px solid rgba(247, 245, 242, 0.12);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 1.5fr 1fr 1fr;
    }
}

.footer-section h3 {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-light);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.footer-section p {
    font-size: 0.88rem;
    color: rgba(247, 245, 242, 0.65);
    line-height: 1.6;
}

.footer-section ul li {
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.footer-section ul li a {
    font-size: 0.88rem;
    color: rgba(247, 245, 242, 0.65);
    transition: color 0.2s ease;
}

.footer-section ul li a:hover {
    color: var(--color-bg);
}

.footer-bottom {
    padding-top: calc(var(--spacing-unit) * 4);
}

.footer-bottom p {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: rgba(247, 245, 242, 0.35);
    line-height: 1.8;
    letter-spacing: 0.01em;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes shimmer {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

.hero h1.shimmer {
    animation: shimmer 1.2s ease-in-out;
}

/* ==========================================================================
   Subtle page-load fade-in
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-label,
.hero h1,
.hero-rule,
.hero-subtitle {
    animation: fadeInUp 0.6s ease-out both;
}

.hero-label { animation-delay: 0.1s; }
.hero h1 { animation-delay: 0.2s; }
.hero-rule { animation-delay: 0.35s; }
.hero-subtitle { animation-delay: 0.45s; }

/* ==========================================================================
   Lively animations
   ========================================================================== */
@keyframes ruleShimmer {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Nav link animated underline */
@media (min-width: 768px) {
    .nav-menu li a {
        position: relative;
    }

    .nav-menu li a::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 0;
        height: 1px;
        background-color: var(--color-accent);
        transition: width 0.3s ease;
    }

    .nav-menu li a:hover::after,
    .nav-menu li a.active::after {
        width: 100%;
    }
}

/* Text link arrow nudge */
.text-link {
    transition: color 0.2s ease, border-color 0.2s ease, padding-left 0.3s ease;
}

.text-link:hover {
    padding-left: 4px;
}

/* ==========================================================================
   Content Pages (About, Privacy)
   ========================================================================== */
.content-section {
    padding: calc(var(--spacing-unit) * 18) 0 calc(var(--spacing-unit) * 10);
}

.content-section h1 {
    font-family: var(--font-body);
    font-size: clamp(2rem, 4.5vw, 2.8rem);
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: calc(var(--spacing-unit) * 5);
}

.content-section h2 {
    font-family: var(--font-body);
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-top: calc(var(--spacing-unit) * 5);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.content-section h3 {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-top: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.content-section p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.75;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.content-section .product-subtitle {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.5;
    margin-top: calc(var(--spacing-unit) * -0.5);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.content-section ul {
    margin-bottom: calc(var(--spacing-unit) * 2.5);
    padding-left: calc(var(--spacing-unit) * 3);
}

.content-section ul li {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.75;
    margin-bottom: calc(var(--spacing-unit) * 1);
    list-style: disc;
}

.content-section ul ul {
    margin-top: calc(var(--spacing-unit) * 1);
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.content-section a {
    color: var(--color-accent);
    border-bottom: 1px solid var(--color-accent-light);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.content-section a:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}