/* =============================================
   namu.biz — Generative Arboretum
   Palette: Forest Green
   Aesthetic: Generative
   Layout: Masonry
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
    --old-growth: #154734;
    --canopy-green: #2a7a5a;
    --new-leaf: #4db882;
    --bark-amber: #c4913e;
    --forest-floor: #1a1f1c;
    --morning-mist: #eef3f0;
    --lichen-gray: #7a9e8e;
    --dew-drop: #d4ece3;
    --shadow-green-light: rgba(21, 71, 52, 0.08);
    --shadow-green-medium: rgba(21, 71, 52, 0.14);
    --font-display: 'Bricolage Grotesque', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

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

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--forest-floor);
    background-color: var(--morning-mist);
    line-height: 1.72;
    letter-spacing: 0.005em;
    overflow-x: hidden;
    position: relative;
}

/* --- SVG Filters (hidden) --- */
.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* --- Noise Overlay --- */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
}

/* --- Scroll Progress Bar --- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background-color: var(--canopy-green);
    z-index: 1000;
    transition: width 50ms linear;
}

/* --- Navigation Toggle --- */
.nav-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--old-growth);
    border: 1.5px solid var(--morning-mist);
    cursor: pointer;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: transform 300ms ease, box-shadow 300ms ease;
}

.nav-toggle:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 16px rgba(21, 71, 52, 0.25);
}

/* --- Navigation Overlay --- */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(238, 243, 240, 0.88);
    z-index: 998;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 400ms ease, visibility 400ms ease;
}

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

.nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 2rem;
    color: var(--old-growth);
    text-decoration: none;
    transition: color 300ms ease;
}

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

/* --- Floating Leaves --- */
.floating-leaves {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    overflow: hidden;
}

.floating-leaf {
    position: absolute;
    animation: leafDrift linear infinite;
}

@keyframes leafDrift {
    0% {
        transform: translateX(-10vw) translateY(0px) rotate(0deg);
        opacity: 0;
    }
    5% {
        opacity: 1;
    }
    50% {
        transform: translateX(55vw) translateY(-30px) rotate(90deg);
    }
    95% {
        opacity: 1;
    }
    100% {
        transform: translateX(120vw) translateY(10px) rotate(180deg);
        opacity: 0;
    }
}

/* --- Hero Canopy --- */
.hero-canopy {
    position: relative;
    width: 100%;
    height: 100vh;
    background: linear-gradient(165deg, #154734 0%, #1a5c42 45%, #2a7a5a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 3;
}

.canopy-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.canopy-svg path {
    fill: none;
    stroke-linecap: round;
}

.hero-content {
    position: relative;
    z-index: 5;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.domain-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(3rem, 8vw, 7rem);
    color: var(--morning-mist);
    letter-spacing: -0.02em;
    mix-blend-mode: screen;
    opacity: 0;
    filter: blur(4px);
    transition: opacity 1200ms ease, filter 1200ms ease;
}

.domain-title.visible {
    opacity: 1;
    filter: blur(0);
}

.scroll-chevron {
    animation: chevronPulse 2s ease-in-out infinite;
    opacity: 0;
    transition: opacity 800ms ease 500ms;
}

.scroll-chevron.visible {
    opacity: 1;
}

@keyframes chevronPulse {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(6px);
    }
}

/* --- Masonry Grid --- */
.masonry-grid {
    width: 70%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 0;
    column-count: 3;
    column-gap: 2rem;
}

/* --- Masonry Blocks --- */
.masonry-block {
    break-inside: avoid;
    border-radius: 24px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 24px var(--shadow-green-light);
    transition: box-shadow 250ms ease, transform 250ms ease, border-color 250ms ease;
    position: relative;
    opacity: 0;
    transform: translateY(40px) scale(0.97);
    border-left: 2px solid transparent;
}

.masonry-block.in-view {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1),
                transform 700ms cubic-bezier(0.22, 1, 0.36, 1),
                box-shadow 250ms ease,
                border-color 250ms ease;
}

.masonry-block:hover {
    box-shadow: 0 8px 32px var(--shadow-green-medium);
    transform: translateY(-2px);
    border-left-color: rgba(42, 122, 90, 0.5);
}

/* Text Blocks */
.text-block {
    background: var(--morning-mist);
    color: var(--forest-floor);
}

/* Accent Blocks */
.accent-block {
    background: var(--old-growth);
    color: var(--morning-mist);
    border-left: 3px solid var(--new-leaf);
}

.accent-block .block-tag {
    color: var(--lichen-gray);
}

.accent-block .block-heading {
    color: var(--morning-mist);
}

.accent-block .accent-text {
    color: var(--dew-drop);
    line-height: 1.72;
}

/* Generative Blocks */
.generative-block {
    background: var(--morning-mist);
    color: var(--forest-floor);
}

/* --- Block Content Styles --- */
.block-tag {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--lichen-gray);
    display: block;
    margin-bottom: 0.75rem;
}

.block-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    letter-spacing: -0.02em;
    color: var(--forest-floor);
    margin-bottom: 1rem;
    line-height: 1.15;
}

.masonry-block p {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.72;
    letter-spacing: 0.005em;
    max-width: 62ch;
    margin-bottom: 1rem;
}

.masonry-block p:last-child {
    margin-bottom: 0;
}

/* Pull Quotes */
.pull-quote {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.3rem, 2.5vw, 2rem);
    line-height: 1.35;
    letter-spacing: -0.01em;
    color: var(--morning-mist);
    margin-bottom: 1rem;
}

/* Mini Canvas in Generative Blocks */
.mini-canvas {
    width: 100%;
    height: 200px;
    margin-bottom: 1rem;
    border-radius: 12px;
    overflow: hidden;
    background: var(--dew-drop);
}

.mini-branch-svg {
    width: 100%;
    height: 100%;
}

.mini-branch-svg path {
    fill: none;
    stroke: var(--canopy-green);
    stroke-linecap: round;
}

.mini-branch-svg.amber path {
    stroke: var(--bark-amber);
}

/* --- Links --- */
a {
    color: var(--canopy-green);
    text-decoration: underline;
    text-decoration-color: rgba(42, 122, 90, 0.3);
    transition: color 300ms ease, text-decoration-color 300ms ease;
}

a:hover {
    color: var(--new-leaf);
    text-decoration-color: var(--canopy-green);
}

/* --- Glitch / Photosynthesis Effect --- */
.masonry-block.photosynthesizing {
    animation: glitchShake 400ms ease;
    box-shadow: 0 0 20px rgba(77, 184, 130, 0.15);
    filter: drop-shadow(2px 0 0 rgba(42, 122, 90, 0.4)) drop-shadow(-2px 0 0 rgba(77, 184, 130, 0.3));
}

@keyframes glitchShake {
    0% { transform: translateX(0); }
    20% { transform: translateX(2px); }
    40% { transform: translateX(-1px); }
    60% { transform: translateX(1px); }
    80% { transform: translateX(-0.5px); }
    100% { transform: translateX(0); }
}

.masonry-block.photosynthesizing::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: rgba(42, 122, 90, 0.3);
    animation: scanlineSweep 300ms linear forwards;
    border-radius: 24px;
}

@keyframes scanlineSweep {
    0% { top: 0; }
    100% { top: 100%; }
}

/* --- Footer: Tree Rings --- */
.tree-rings-footer {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
}

.tree-rings-svg {
    width: 300px;
    height: 300px;
}

.footer-domain {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--lichen-gray);
    letter-spacing: -0.01em;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .masonry-grid {
        width: 85%;
        column-count: 2;
    }
}

@media (max-width: 640px) {
    .masonry-grid {
        width: 90%;
        column-count: 1;
        padding: 4rem 0;
    }

    .hero-canopy {
        height: 100svh;
    }

    .nav-toggle {
        top: 1rem;
        right: 1rem;
    }

    .block-heading {
        font-size: 1.6rem;
    }

    .pull-quote {
        font-size: 1.3rem;
    }

    .tree-rings-svg {
        width: 220px;
        height: 220px;
    }
}