/* ============================================================
   scire.dev — to know
   muted-vintage / cinematic / broken-grid
   ============================================================ */

/* ---------- TOKENS ---------- */
:root {
    /* Palette (exact hex from DESIGN.md) */
    --notebook-warm: #E8DFD8;
    --ink-faded: #5A5048;
    --coffee-stain: #A88B70;
    --watercolor-blue: #7B9EB0;
    --highlight-yellow: #E8D090;
    --deep-charcoal: #3A3430;
    --page-cream: #F5F0E8;
    --terminal-deep: #4A443E;

    /* Fonts (DESIGN.md: Epilogue / Source Serif 4 / Fira Code) */
    --font-head: 'Epilogue', 'Inter', system-ui, sans-serif;
    --font-body: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;
    --font-code: 'Fira Code', 'space', ui-monospace, monospace;

    --rad-sm: 4px;
    --rad-md: 10px;
    --shadow-paper: 0 2px 0 rgba(58, 52, 48, 0.04), 0 12px 28px -16px rgba(58, 52, 48, 0.18);
    --shadow-deep: 0 18px 44px -22px rgba(58, 52, 48, 0.32);
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--notebook-warm);
    color: var(--ink-faded);
    font-family: var(--font-body);
    font-size: clamp(16px, 1.5vw, 18px);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

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

h1, h2, h3, h4 {
    font-family: var(--font-head);
    color: var(--deep-charcoal);
    margin: 0;
    letter-spacing: -0.02em;
}

p { margin: 0 0 1em 0; }

code, pre {
    font-family: var(--font-code);
    font-size: 0.86em;
}

/* ============================================================
   WATERCOLOR WASHES
   layered radial-gradients in muted blue and warm amber
   ============================================================ */
.watercolor-wash {
    position: absolute;
    pointer-events: none;
    z-index: 0;
    filter: blur(36px);
    opacity: 0;
    transition: opacity 0.6s ease-out;
    mix-blend-mode: multiply;
}
.watercolor-wash.is-in { opacity: 0.85; }

.wash-blue {
    width: 60vmax;
    height: 60vmax;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(123, 158, 176, 0.55) 0%, rgba(123, 158, 176, 0.18) 30%, transparent 60%),
        radial-gradient(ellipse at 70% 60%, rgba(123, 158, 176, 0.40) 0%, transparent 55%);
    top: -12vmax;
    left: -10vmax;
}

.wash-amber {
    width: 56vmax;
    height: 56vmax;
    background:
        radial-gradient(ellipse at 60% 50%, rgba(168, 139, 112, 0.55) 0%, rgba(232, 208, 144, 0.22) 32%, transparent 62%),
        radial-gradient(ellipse at 30% 70%, rgba(232, 208, 144, 0.42) 0%, transparent 55%);
    bottom: -14vmax;
    right: -10vmax;
}

/* ============================================================
   THE NOTEBOOK (HERO)
   ============================================================ */
.notebook {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    padding: 6vh 8vw 14vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background:
        repeating-linear-gradient(
            transparent 0,
            transparent 31px,
            rgba(90, 80, 72, 0.06) 31px,
            rgba(90, 80, 72, 0.06) 32px
        ),
        var(--notebook-warm);
}

.notebook-inner {
    position: relative;
    z-index: 2;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

.notebook-meta {
    font-family: var(--font-code);
    font-size: 13px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--coffee-stain);
    margin-bottom: 1.2em;
    opacity: 0;
    transform: translateY(6px);
    animation: rise 0.7s 0.1s ease-out forwards;
}

.wordmark {
    font-family: var(--font-head);
    font-size: clamp(64px, 14vw, 184px);
    line-height: 0.92;
    letter-spacing: -0.04em;
    color: var(--deep-charcoal);
    margin: 0 0 0.5em -0.04em;
    display: inline-block;
    font-variation-settings: "wght" 600;
}

.wordmark .ch {
    display: inline-block;
    font-weight: 600;
    font-variation-settings: "wght" 600;
    transform: translateY(8px);
    opacity: 0;
    transition: font-variation-settings 0.6s ease, font-weight 0.6s ease;
    animation: chRise 0.6s ease-out forwards;
}
.wordmark .ch:nth-child(1) { animation-delay: 0.30s; }
.wordmark .ch:nth-child(2) { animation-delay: 0.36s; }
.wordmark .ch:nth-child(3) { animation-delay: 0.42s; }
.wordmark .ch:nth-child(4) { animation-delay: 0.48s; }
.wordmark .ch:nth-child(5) { animation-delay: 0.54s; }
.wordmark .ch:nth-child(6) { animation-delay: 0.60s; }
.wordmark .ch:nth-child(7) { animation-delay: 0.66s; }
.wordmark .ch:nth-child(8) { animation-delay: 0.72s; }
.wordmark .ch:nth-child(9) { animation-delay: 0.78s; }

.wordmark .ch.dot { color: var(--coffee-stain); }

@keyframes chRise {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.notebook-translit {
    font-family: var(--font-body);
    font-size: clamp(15px, 1.5vw, 18px);
    color: var(--ink-faded);
    margin-bottom: 0.4em;
    opacity: 0;
    animation: rise 0.7s 1.0s ease-out forwards;
}
.notebook-translit em { color: var(--coffee-stain); font-style: italic; }
.notebook-translit .ipa { font-family: var(--font-code); font-size: 0.92em; color: var(--watercolor-blue); }
.notebook-translit .ling { font-style: italic; color: var(--ink-faded); opacity: 0.8; }

.notebook-tag {
    font-size: clamp(16px, 1.6vw, 20px);
    color: var(--ink-faded);
    max-width: 36ch;
    margin-top: 0.6em;
    opacity: 0;
    animation: rise 0.7s 1.2s ease-out forwards;
}

@keyframes rise {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ----- code-bracket decorations (SVG, stroke-dashoffset draw) ----- */
.bracket-deco {
    position: absolute;
    width: 70px;
    height: 200px;
    fill: none;
    stroke: var(--ink-faded);
    stroke-width: 2.4;
    stroke-linecap: round;
    opacity: 0.32;
    z-index: 1;
}
.bracket-deco path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    animation: drawStroke 1.4s 0.4s ease-out forwards;
}
@keyframes drawStroke {
    to { stroke-dashoffset: 0; }
}
.bracket-left  { top: 50%; left: 4vw;  transform: translateY(-50%); }
.bracket-right { top: 50%; right: 4vw; transform: translateY(-50%); }

/* ----- preview cards peeking from below ----- */
.peek-cards {
    position: absolute;
    left: 0;
    right: 0;
    bottom: -20px;
    display: flex;
    gap: 18px;
    padding: 0 8vw;
    z-index: 1;
}
.peek-card {
    flex: 1 1 0;
    min-width: 0;
    background: var(--page-cream);
    border: 1px solid rgba(90, 80, 72, 0.18);
    border-radius: var(--rad-md);
    padding: 14px 16px 24px;
    box-shadow: var(--shadow-paper);
    transform: translateY(60%);
    opacity: 0;
    animation: peekRise 0.9s 1.4s ease-out forwards;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.peek-card .peek-label {
    font-family: var(--font-code);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--coffee-stain);
}
.peek-card .peek-title {
    font-family: var(--font-head);
    font-weight: 600;
    color: var(--deep-charcoal);
    font-size: 15px;
}
.peek-1 { transform: translateY(60%) rotate(-1.4deg); animation-delay: 1.4s; }
.peek-2 { transform: translateY(70%) rotate(0.9deg);  animation-delay: 1.55s; }
.peek-3 { transform: translateY(64%) rotate(-0.6deg); animation-delay: 1.7s; }

@keyframes peekRise {
    0%   { opacity: 0; }
    50%  { opacity: 1; }
    100% { opacity: 1; }
}
.peek-1.is-rise { transform: translateY(58%) rotate(-1.4deg); }
.peek-2.is-rise { transform: translateY(66%) rotate(0.9deg); }
.peek-3.is-rise { transform: translateY(60%) rotate(-0.6deg); }

/* ----- scroll cue ----- */
.scroll-cue {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    z-index: 3;
    color: var(--coffee-stain);
    opacity: 0;
    animation: rise 0.7s 1.8s ease-out forwards;
}
.scroll-cue-line {
    width: 1px;
    height: 28px;
    background: var(--coffee-stain);
    animation: scrollPulse 1.8s ease-in-out infinite;
    transform-origin: top;
}
@keyframes scrollPulse {
    0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
    50%      { transform: scaleY(1);   opacity: 1; }
}
.scroll-cue-label {
    font-family: var(--font-code);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

/* ============================================================
   SECTION HEADERS (shared)
   ============================================================ */
.section-header {
    max-width: 900px;
    margin: 0 auto 60px;
    padding: 0 8vw;
    text-align: left;
}
.section-num {
    display: block;
    font-family: var(--font-code);
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--coffee-stain);
    margin-bottom: 12px;
    text-transform: uppercase;
}
.section-title {
    font-size: clamp(34px, 5vw, 64px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.025em;
    margin-bottom: 0.3em;
    color: var(--deep-charcoal);
}
.section-title::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 12px;
    background: var(--highlight-yellow);
    transform: translateY(-6px) rotate(-2deg);
    border-radius: 2px;
}
.section-lede {
    font-family: var(--font-body);
    font-size: clamp(16px, 1.5vw, 19px);
    line-height: 1.7;
    color: var(--ink-faded);
    max-width: 60ch;
}

/* ============================================================
   KNOWLEDGE FRAGMENTS — BROKEN GRID
   ============================================================ */
.fragments {
    position: relative;
    padding: 14vh 0 16vh;
    overflow: hidden;
}
.wash-frag-1 { top: -12vmax; left: -8vmax; }
.wash-frag-2 { bottom: -14vmax; right: -8vmax; }

.broken-grid {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 6vw;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}

.block {
    background: var(--page-cream);
    border: 1px solid rgba(90, 80, 72, 0.16);
    border-radius: var(--rad-md);
    padding: 26px 28px;
    box-shadow: var(--shadow-paper);
    position: relative;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.block:hover {
    transform: translateY(-2px) rotate(0deg) !important;
    box-shadow: var(--shadow-deep);
}

/* deliberate misalignment per DESIGN.md prompts */
.block-1 { grid-column: 1 / 8;  grid-row: 1; transform: rotate(-1deg); }
.block-2 { grid-column: 6 / 13; grid-row: 1; margin-top: 40px; z-index: 2; transform: rotate(0.8deg); }
.block-3 { grid-column: 2 / 9;  grid-row: 2; margin-top: -20px; transform: rotate(-0.6deg); }
.block-4 { grid-column: 8 / 13; grid-row: 2; margin-top: 30px; transform: rotate(1.2deg); z-index: 2; }
.block-5 { grid-column: 3 / 11; grid-row: 3; margin-top: -30px; transform: rotate(-0.4deg); }

.block-tag {
    font-family: var(--font-code);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--coffee-stain);
    margin-bottom: 12px;
    text-transform: lowercase;
}
.block-tag .bracket {
    color: var(--watercolor-blue);
    font-weight: 700;
    margin: 0 4px;
}
.block-title {
    font-size: clamp(20px, 2.4vw, 28px);
    font-weight: 700;
    line-height: 1.18;
    margin-bottom: 0.6em;
    letter-spacing: -0.015em;
}
.block-body {
    font-size: 16px;
    line-height: 1.75;
    color: var(--ink-faded);
}
.block-pull {
    margin-top: 1em;
    padding: 14px 16px;
    background: linear-gradient(90deg, var(--highlight-yellow) 0%, rgba(232, 208, 144, 0.4) 100%);
    border-left: 3px solid var(--coffee-stain);
    font-style: italic;
    color: var(--deep-charcoal);
    font-family: var(--font-body);
    border-radius: 2px;
}
.block-code {
    margin-top: 1em;
    padding: 14px 16px;
    background: rgba(58, 52, 48, 0.05);
    border-left: 2px solid var(--watercolor-blue);
    border-radius: 4px;
    overflow-x: auto;
    font-family: var(--font-code);
    font-size: 13px;
    line-height: 1.6;
    color: var(--ink-faded);
}
.block-code .kw  { color: var(--watercolor-blue); font-weight: 600; }
.block-code .fn  { color: var(--coffee-stain); }
.block-code .lit { color: var(--deep-charcoal); }

.block-list {
    margin: 1em 0 0;
    padding: 0;
    list-style: none;
}
.block-list li {
    padding: 6px 0;
    border-bottom: 1px dashed rgba(90, 80, 72, 0.18);
    color: var(--ink-faded);
}
.block-list li:last-child { border-bottom: none; }
.block-list .li-marker {
    display: inline-block;
    width: 16px;
    color: var(--coffee-stain);
    font-weight: 700;
}

/* ============================================================
   THE STACK
   layered, slightly rotated cards
   ============================================================ */
.stack-section {
    position: relative;
    padding: 14vh 0 16vh;
    overflow: hidden;
    background:
        linear-gradient(180deg, var(--notebook-warm) 0%, #DFD5CD 100%);
}
.section-header-stack { margin-bottom: 80px; }
.wash-stack { top: 10vmax; right: -16vmax; }

.stack {
    position: relative;
    width: min(640px, 86vw);
    height: 460px;
    margin: 0 auto;
    z-index: 2;
}

.stack-card {
    position: absolute;
    inset: 0;
    background: var(--page-cream);
    border: 1px solid rgba(90, 80, 72, 0.18);
    border-radius: var(--rad-md);
    padding: 36px 38px;
    box-shadow: var(--shadow-deep);
    cursor: pointer;
    transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1), opacity 0.5s ease;
    transform-origin: center bottom;
    will-change: transform;
}
.stack-card .stack-meta {
    font-family: var(--font-code);
    font-size: 12px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coffee-stain);
    display: block;
    margin-bottom: 12px;
}
.stack-card .stack-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    color: var(--deep-charcoal);
    margin-bottom: 0.4em;
    letter-spacing: -0.02em;
}
.stack-card .stack-body {
    font-size: 17px;
    line-height: 1.7;
    color: var(--ink-faded);
    max-width: 50ch;
}
.stack-card .stack-code {
    display: inline-block;
    margin-top: 1.2em;
    padding: 6px 12px;
    background: rgba(58, 52, 48, 0.08);
    border-left: 2px solid var(--watercolor-blue);
    color: var(--ink-faded);
    font-family: var(--font-code);
    font-size: 14px;
    border-radius: 2px;
}

/* default stack arrangement (set/overridden by JS via --depth) */
.stack-card-1 { transform: translateY(0)    rotate(-2.4deg); z-index: 5; }
.stack-card-2 { transform: translateY(8px)  rotate(1.6deg);  z-index: 4; }
.stack-card-3 { transform: translateY(16px) rotate(-1.0deg); z-index: 3; }
.stack-card-4 { transform: translateY(24px) rotate(2.0deg);  z-index: 2; }
.stack-card-5 { transform: translateY(32px) rotate(-0.6deg); z-index: 1; }

.stack-caption {
    text-align: center;
    margin-top: 50px;
    font-family: var(--font-code);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--coffee-stain);
}

/* ============================================================
   GLOSSARY
   ============================================================ */
.glossary {
    padding: 12vh 0 14vh;
    background: var(--notebook-warm);
    position: relative;
}
.glossary-list {
    max-width: 940px;
    margin: 0 auto;
    padding: 0 6vw;
}
.gl-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    padding: 22px 0;
    border-bottom: 1px dashed rgba(90, 80, 72, 0.28);
    align-items: baseline;
}
.gl-row:last-child { border-bottom: none; }
.gl-term {
    font-family: var(--font-head);
    font-size: clamp(22px, 2.8vw, 32px);
    font-weight: 700;
    color: var(--deep-charcoal);
    letter-spacing: -0.02em;
}
.gl-term .gl-pos {
    font-family: var(--font-body);
    font-style: italic;
    font-weight: 400;
    color: var(--coffee-stain);
    font-size: 0.6em;
    margin-left: 8px;
}
.gl-def {
    margin: 0;
    font-size: 17px;
    line-height: 1.75;
    color: var(--ink-faded);
}

/* ============================================================
   TERMINAL FOOTER
   ============================================================ */
.terminal {
    position: relative;
    background: var(--terminal-deep);
    color: var(--page-cream);
    padding: 12vh 0 8vh;
    overflow: hidden;
}
.wash-term {
    top: -10vmax;
    left: 30vmax;
    opacity: 0;
}
.wash-term.is-in { opacity: 0.55; }

.terminal .bracket-term-l,
.terminal .bracket-term-r {
    stroke: var(--page-cream);
    opacity: 0.18;
    width: 60px;
    height: 180px;
}
.bracket-term-l { top: 50%; left: 3vw;  transform: translateY(-50%); }
.bracket-term-r { top: 50%; right: 3vw; transform: translateY(-50%); }

.terminal-inner {
    max-width: 940px;
    margin: 0 auto;
    padding: 0 6vw;
    position: relative;
    z-index: 2;
}

.terminal-prompt {
    font-family: var(--font-code);
    font-size: 14px;
    color: var(--page-cream);
    margin: 0 0 32px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}
.prom-host { color: var(--watercolor-blue); }
.prom-path { color: var(--highlight-yellow); }
.prom-tilde { color: var(--coffee-stain); }
.prom-sep   { color: rgba(245, 240, 232, 0.6); }
.prom-cmd   { color: var(--page-cream); }
.caret {
    display: inline-block;
    color: var(--highlight-yellow);
    margin-left: 4px;
    animation: blink 1.05s steps(2) infinite;
}
@keyframes blink {
    0%, 49%  { opacity: 1; }
    50%, 100% { opacity: 0; }
}

.colophon {
    font-family: var(--font-body);
    color: var(--page-cream);
    font-size: 16px;
    line-height: 1.8;
}
.colo-p { max-width: 60ch; color: rgba(245, 240, 232, 0.92); }
.colo-grid {
    margin: 32px 0 28px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    border-top: 1px dashed rgba(245, 240, 232, 0.22);
    border-bottom: 1px dashed rgba(245, 240, 232, 0.22);
    padding: 22px 0;
}
.colo-col p { margin: 0; color: rgba(245, 240, 232, 0.86); font-size: 15px; }
.colo-col code {
    background: rgba(245, 240, 232, 0.08);
    padding: 1px 6px;
    border-radius: 3px;
    color: var(--highlight-yellow);
}
.colo-label {
    font-family: var(--font-code);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--coffee-stain);
    text-transform: uppercase;
    display: block;
    margin-bottom: 6px;
}
.colo-foot {
    margin-top: 22px;
    text-align: center;
    font-family: var(--font-code);
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--coffee-stain);
    text-transform: uppercase;
}

/* ============================================================
   SHAKE-ERROR ANIMATION (DESIGN.md prompts)
   @keyframes shake (2px oscillation, 0.3s)
   ============================================================ */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25%      { transform: translateX(-2px); }
    75%      { transform: translateX(2px); }
}
.is-shaking { animation: shake 0.3s ease-in-out; }

/* ============================================================
   STATE — section reveal on intersection
   ============================================================ */
.fragments .block,
.glossary .gl-row {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.fragments.is-in .block,
.glossary.is-in .gl-row {
    opacity: 1;
    transform: translateY(0);
}
.fragments.is-in .block-1 { transform: translateY(0) rotate(-1deg);   transition-delay: 0.05s; }
.fragments.is-in .block-2 { transform: translateY(0) rotate(0.8deg);  transition-delay: 0.15s; }
.fragments.is-in .block-3 { transform: translateY(0) rotate(-0.6deg); transition-delay: 0.25s; }
.fragments.is-in .block-4 { transform: translateY(0) rotate(1.2deg);  transition-delay: 0.35s; }
.fragments.is-in .block-5 { transform: translateY(0) rotate(-0.4deg); transition-delay: 0.45s; }
.glossary.is-in .gl-row:nth-child(1) { transition-delay: 0.06s; }
.glossary.is-in .gl-row:nth-child(2) { transition-delay: 0.16s; }
.glossary.is-in .gl-row:nth-child(3) { transition-delay: 0.26s; }
.glossary.is-in .gl-row:nth-child(4) { transition-delay: 0.36s; }
.glossary.is-in .gl-row:nth-child(5) { transition-delay: 0.46s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
    .broken-grid { grid-template-columns: repeat(6, 1fr); gap: 14px; }
    .block-1 { grid-column: 1 / 7;  grid-row: auto; transform: rotate(-0.6deg); }
    .block-2 { grid-column: 1 / 7;  grid-row: auto; margin-top: 0; transform: rotate(0.4deg); }
    .block-3 { grid-column: 1 / 7;  grid-row: auto; margin-top: 0; transform: rotate(-0.4deg); }
    .block-4 { grid-column: 1 / 7;  grid-row: auto; margin-top: 0; transform: rotate(0.6deg); }
    .block-5 { grid-column: 1 / 7;  grid-row: auto; margin-top: 0; transform: rotate(-0.3deg); }
    .gl-row  { grid-template-columns: 1fr; gap: 4px; }
    .colo-grid { grid-template-columns: 1fr; }
    .stack { height: 520px; }
    .bracket-deco { display: none; }
    .peek-cards { gap: 10px; padding: 0 4vw; }
    .peek-card { padding: 10px 12px 18px; }
    .peek-card .peek-title { font-size: 13px; }
}

@media (max-width: 600px) {
    .notebook { padding: 6vh 6vw 18vh; }
    .wordmark { font-size: clamp(54px, 18vw, 96px); }
    .section-title { font-size: clamp(28px, 8vw, 40px); }
    .stack { height: 560px; }
    .stack-card { padding: 24px 22px; }
    .terminal-prompt { font-size: 12px; }
}