:root {
    --canopy: #0B1D14;
    --undergrowth: #0F2A1C;
    --moss: #163D2A;
    --lichen: #2D4A3E;
    --fern: #C8DFC4;
    --sage: #9BB896;
    --mist: #5A8A6C;
    --green: #6BCB77;
    --spring: #A8D5A2;
    --ghost: #1E3B2C;
    --aqua: #4ECDC4;
    --chlorophyll: #3B8A5B;
    --code-bg: #0A1A12;
    --canopy-deep: #0F1F19;
    --font-display: 'Darker Grotesque', sans-serif;
    --font-body: 'Albert Sans', sans-serif;
    --font-code: 'Martian Mono', monospace;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    background-color: var(--canopy);
    color: var(--sage);
    font-family: var(--font-body);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ========================================
   Concrete Noise Texture
   ======================================== */
.concrete-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.035;
    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='0.75' 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;
}

/* ========================================
   Water Bubble System
   ======================================== */
.bubble-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bubble {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(ellipse at 30% 30%, rgba(78, 205, 196, 0.15), rgba(78, 205, 196, 0.03));
    border: 1px solid rgba(78, 205, 196, 0.08);
    animation: bubble-rise var(--rise-duration) linear infinite, bubble-wobble var(--wobble-duration) ease-in-out infinite;
    animation-delay: var(--delay);
}

.bubble::before {
    content: '';
    position: absolute;
    top: 15%;
    left: 20%;
    width: 35%;
    height: 35%;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.2), transparent);
}

@keyframes bubble-rise {
    0% {
        transform: translateY(110vh);
    }
    100% {
        transform: translateY(-120px);
    }
}

@keyframes bubble-wobble {
    0%, 100% {
        margin-left: 0;
    }
    25% {
        margin-left: 15px;
    }
    75% {
        margin-left: -15px;
    }
}

/* ========================================
   Leaf Watermark
   ======================================== */
.leaf-watermark {
    position: absolute;
    top: 64px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
}

/* ========================================
   Header
   ======================================== */
.beam-header {
    height: 64px;
    display: flex;
    align-items: center;
    padding: 0 2rem;
    border-bottom: 1px solid var(--lichen);
    position: relative;
    z-index: 10;
}

.beam-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--fern);
    letter-spacing: -0.03em;
    text-transform: uppercase;
}

/* ========================================
   Manifesto
   ======================================== */
.manifesto {
    max-width: 800px;
    padding: 3rem 2rem;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    line-height: 1.7;
    color: var(--sage);
    position: relative;
    z-index: 2;
}

/* ========================================
   Masonry Grid
   ======================================== */
.masonry-grid {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
    display: grid;
    grid-template-columns: 38fr 32fr 30fr;
    grid-auto-rows: 10px;
    gap: 4px;
    position: relative;
    z-index: 2;
}

/* Column borders simulated via border styling on blocks */
.masonry-grid::before,
.masonry-grid::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--lichen);
    z-index: 1;
    pointer-events: none;
}

.masonry-grid::before {
    left: calc(38% + 2rem);
}

.masonry-grid::after {
    left: calc(70% + 2rem);
}

/* ========================================
   Block Base
   ======================================== */
.block {
    background: var(--undergrowth);
    border: 1px solid var(--lichen);
    padding: clamp(1.5rem, 3vw, 3rem);
    position: relative;
    overflow: hidden;
    border-left: 2px solid transparent;
    transition: border-left-color 200ms ease;
}

.block:hover {
    border-left-color: var(--green);
}

.block[data-span="18"] { grid-row-end: span 18; }
.block[data-span="20"] { grid-row-end: span 20; }
.block[data-span="22"] { grid-row-end: span 22; }
.block[data-span="24"] { grid-row-end: span 24; }
.block[data-span="26"] { grid-row-end: span 26; }
.block[data-span="28"] { grid-row-end: span 28; }
.block[data-span="30"] { grid-row-end: span 30; }
.block[data-span="32"] { grid-row-end: span 32; }
.block[data-span="34"] { grid-row-end: span 34; }
.block[data-span="36"] { grid-row-end: span 36; }
.block[data-span="38"] { grid-row-end: span 38; }
.block[data-span="40"] { grid-row-end: span 40; }
.block[data-span="44"] { grid-row-end: span 44; }

/* ========================================
   Block Code Variant
   ======================================== */
.block-code {
    background: var(--code-bg);
    border: 1px solid var(--lichen);
}

/* ========================================
   Leaf Vein Border (decorative alternate border)
   ======================================== */
.block-leaf-border {
    border-right: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='100' viewBox='0 0 4 100'%3E%3Cpath d='M2,0 Q3,10 2,20 Q1,30 2,40 Q3,50 2,60 Q1,70 2,80 Q3,90 2,100' fill='none' stroke='%232D4A3E' stroke-width='1.5'/%3E%3C/svg%3E");
    background-repeat: repeat-y;
    background-position: right top;
    background-size: 4px auto;
    padding-right: calc(clamp(1.5rem, 3vw, 3rem) + 4px);
}

/* ========================================
   Skeleton Loading
   ======================================== */
.skeleton-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--canopy-deep);
    padding: clamp(1.5rem, 3vw, 3rem);
    z-index: 5;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 12px;
    padding-top: 2.5rem;
    transition: opacity 400ms ease;
}

.skeleton-line {
    height: 14px;
    background: var(--lichen);
    position: relative;
    overflow: hidden;
}

.skeleton-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, var(--ghost) 50%, transparent 100%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
}

.skeleton-line-short { width: 35%; }
.skeleton-line-medium { width: 60%; }
.skeleton-line-long { width: 90%; }

@keyframes skeleton-shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.block-skeleton.resolved .skeleton-overlay {
    opacity: 0;
    pointer-events: none;
}

/* ========================================
   Block Content
   ======================================== */
.block-content {
    opacity: 0;
    transition: opacity 400ms ease 100ms;
    position: relative;
}

.block-skeleton.resolved .block-content {
    opacity: 1;
}

/* ========================================
   Structural Annotations
   ======================================== */
.annotation {
    position: absolute;
    font-family: var(--font-code);
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--mist);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: color 200ms ease;
    z-index: 6;
}

.annotation:hover {
    color: var(--aqua);
}

.annotation-tl {
    top: 6px;
    left: 8px;
}

.annotation-br {
    bottom: 6px;
    right: 8px;
}

/* ========================================
   Leaf Entering Animation
   ======================================== */
.leaf-entering {
    position: absolute;
    top: 6px;
    left: calc(8px + 6em);
    opacity: 0;
    transition: opacity 300ms ease;
    z-index: 6;
}

.block-skeleton.resolved .leaf-entering {
    animation: leaf-fall 600ms ease forwards;
}

@keyframes leaf-fall {
    0% {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: translateY(8px) rotate(30deg);
    }
}

/* ========================================
   Block Label
   ======================================== */
.block-label {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--mist);
    display: block;
    margin-bottom: 0.75rem;
}

/* ========================================
   Block Title
   ======================================== */
.block-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(1.4rem, 2.5vw, 2.2rem);
    letter-spacing: -0.03em;
    color: var(--fern);
    margin-bottom: 1rem;
    line-height: 1.1;
}

/* Section headers uppercase */
.block-label + .block-title {
    text-transform: none;
}

/* ========================================
   Block Body
   ======================================== */
.block-body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.95rem, 1.4vw, 1.1rem);
    line-height: 1.7;
    color: var(--sage);
    margin-bottom: 1rem;
}

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

/* ========================================
   Code Text
   ======================================== */
.code-text {
    font-family: var(--font-code);
    font-size: 0.85em;
    color: var(--green);
    line-height: 1.8;
}

/* ========================================
   Leaf Divider
   ======================================== */
.leaf-divider {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid #1A3D2F;
    position: relative;
    grid-row-end: span 6;
}

/* ========================================
   Footer
   ======================================== */
.beam-footer {
    height: 64px;
    display: flex;
    align-items: center;
    padding: 0 2rem;
    border-top: 1px solid var(--lichen);
    position: relative;
    z-index: 2;
}

.footer-text {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.8rem;
    color: var(--mist);
}

/* ========================================
   Media Queries
   ======================================== */
@media (max-width: 768px) {
    .masonry-grid {
        grid-template-columns: 1fr 1fr;
    }

    .masonry-grid::before {
        left: 50%;
    }

    .masonry-grid::after {
        display: none;
    }

    .leaf-watermark {
        display: none;
    }
}

@media (max-width: 480px) {
    .masonry-grid {
        grid-template-columns: 1fr;
        padding: 0 1rem 4rem;
    }

    .masonry-grid::before,
    .masonry-grid::after {
        display: none;
    }

    .block-body {
        font-size: 0.95rem;
    }

    .block-title {
        font-size: 1.3rem;
    }

    .block {
        grid-row-end: auto !important;
    }
}