/* diplomatic.quest -- a 1930s diplomatic pouch interior
   Single-document classified cable layout
   Palette: deep-burgundy / institutional darkness
   Type stack: Libre Baskerville / Lora / Josefin Sans / Source Code Pro
*/

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border-radius: 0;
}

:root {
    /* Palette */
    --dispatch-black: #120810;
    --violet-ink: #0A0610;
    --dried-blood: #2A1018;
    --worn-vellum: #E4D5C4;
    --tobacco-leaf: #C4B09A;
    --brass-fitting: #9A7B5A;
    --signal-amber: #D4A84A;
    --registry-red: #6A4A3A;
    --carbon-shadow: #4A2030;
    --ribbon-ink: #5A3A2A;
    --violet-cast: #3A2040;

    /* Spatial constants */
    --left-margin: 12%;
    --column-width: 540px;
    --annex-column-width: 460px;
    --baseline: 1.6rem;

    /* Background driven by JS for Annex transition */
    --page-bg: var(--dispatch-black);

    /* Rule progress driven by JS scroll listener */
    --rule-progress: 0vh;
}

html {
    background: var(--page-bg);
    scroll-behavior: smooth;
}

body {
    background: var(--page-bg);
    color: var(--tobacco-leaf);
    font-family: 'Lora', Georgia, serif;
    font-size: clamp(1rem, 1.6vw, 1.15rem);
    line-height: 1.9;
    letter-spacing: 0.008em;
    transition: background-color 1500ms ease;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ------------------------------------------------------------------
   Continuous left-margin rule -- single 1px line spanning Preamble + Body
   Implemented as fixed element with height controlled by --rule-progress
------------------------------------------------------------------ */
#margin-rule {
    position: fixed;
    top: 0;
    left: var(--left-margin);
    width: 1px;
    height: var(--rule-progress);
    background: var(--carbon-shadow);
    z-index: 1;
    pointer-events: none;
}

/* ------------------------------------------------------------------
   Registry numbers in outer left margin (rotated)
------------------------------------------------------------------ */
#registry-numbers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.registry-num {
    position: absolute;
    left: calc(var(--left-margin) - 60px);
    font-family: 'Source Code Pro', monospace;
    font-size: 0.55rem;
    color: var(--carbon-shadow);
    opacity: 0;
    letter-spacing: 0.14em;
    transform: rotate(-90deg);
    transform-origin: left top;
    white-space: nowrap;
    transition: opacity 800ms ease;
}

.registry-num.visible {
    opacity: 0.3;
}

/* ------------------------------------------------------------------
   The Cable Column -- the rigid left-aligned content area
------------------------------------------------------------------ */
.cable-column {
    margin-left: var(--left-margin);
    width: var(--column-width);
    max-width: calc(100vw - var(--left-margin) - 24px);
    position: relative;
    padding-left: 24px;
}

.annex-column {
    width: var(--annex-column-width);
}

/* ------------------------------------------------------------------
   Classification stamps -- right-aligned to text column
------------------------------------------------------------------ */
.classification-stamp {
    display: block;
    text-align: right;
    font-family: 'Source Code Pro', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--registry-red);
    opacity: 0;
    margin-bottom: calc(var(--baseline) * 1.5);
    transform: translateX(10px);
    transition: opacity 400ms ease, transform 400ms ease;
}

.classification-stamp.visible {
    opacity: 0.6;
    transform: translateX(0);
}

/* ------------------------------------------------------------------
   The Header Block -- 100vh
------------------------------------------------------------------ */
.header-block {
    height: 100vh;
    display: flex;
    align-items: flex-start;
    padding-top: 28vh;
    background: var(--dispatch-black);
}

.cable-title {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 700;
    font-size: clamp(3rem, 7vw, 5.5rem);
    letter-spacing: -0.01em;
    line-height: 1.0;
    color: var(--worn-vellum);
    margin-bottom: calc(var(--baseline) * 2);
}

.cable-meta {
    margin-top: var(--baseline);
}

.meta-line {
    font-family: 'Source Code Pro', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    color: var(--ribbon-ink);
    text-transform: uppercase;
    margin-bottom: calc(var(--baseline) * 0.5);
    line-height: 2.2;
}

/* ------------------------------------------------------------------
   The Preamble -- 110vh
------------------------------------------------------------------ */
.preamble {
    min-height: 110vh;
    padding-top: 18vh;
    padding-bottom: 12vh;
}

/* ------------------------------------------------------------------
   The Body of the Cable -- variable, large
------------------------------------------------------------------ */
.cable-body {
    min-height: 240vh;
    padding-top: 14vh;
    padding-bottom: 12vh;
}

/* ------------------------------------------------------------------
   Headings -- H2 style for section labels
------------------------------------------------------------------ */
.cable-heading {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 700;
    font-size: clamp(1.4rem, 3vw, 2rem);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--brass-fitting);
    margin-bottom: calc(var(--baseline) * 2);
    line-height: 1.2;
}

/* ------------------------------------------------------------------
   Body paragraphs -- vertical clip-path reveal animation
------------------------------------------------------------------ */
.cable-paragraph {
    font-family: 'Lora', Georgia, serif;
    font-weight: 400;
    color: var(--tobacco-leaf);
    margin-bottom: calc(var(--baseline) * 1.5);
    max-width: 100%;
}

.cable-paragraph.indented {
    margin-left: 80px;
    font-style: italic;
    color: var(--tobacco-leaf);
}

/* Reveal mechanism using clip-path */
.reveal {
    clip-path: inset(100% 0 0 0);
    transition: clip-path 900ms cubic-bezier(0.25, 0, 0.3, 1);
}

.reveal.visible {
    clip-path: inset(0 0 0 0);
}

/* ------------------------------------------------------------------
   Paragraph-break markers -- centered three em-dashes
------------------------------------------------------------------ */
.paragraph-break {
    display: block;
    text-align: center;
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: 0.65rem;
    letter-spacing: 0.4em;
    color: var(--carbon-shadow);
    opacity: 0.5;
    margin: calc(var(--baseline) * 2) 0;
    width: 100%;
}

/* ------------------------------------------------------------------
   The Annex -- 120vh, background shifts to violet-ink
------------------------------------------------------------------ */
.annex {
    min-height: 120vh;
    padding-top: 16vh;
    padding-bottom: 10vh;
    position: relative;
}

.annex-rule {
    height: 1px;
    background: var(--violet-cast);
    width: 100%;
    margin-bottom: calc(var(--baseline) * 2);
}

.annex-heading {
    color: var(--brass-fitting);
}

/* ------------------------------------------------------------------
   The Authentication -- 60vh, centered
------------------------------------------------------------------ */
.authentication {
    height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-bottom: 200px;
    background: var(--violet-ink);
}

.auth-block {
    text-align: center;
    max-width: 540px;
    padding: 0 24px;
}

.auth-signoff {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    color: var(--worn-vellum);
    margin-bottom: var(--baseline);
    line-height: 1.6;
}

.auth-date {
    font-family: 'Lora', Georgia, serif;
    font-style: italic;
    font-size: 0.85rem;
    color: var(--tobacco-leaf);
    margin-bottom: calc(var(--baseline) * 2);
    line-height: 1.6;
}

.auth-footer {
    font-family: 'Source Code Pro', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    color: var(--registry-red);
    text-transform: uppercase;
    margin-top: calc(var(--baseline) * 2);
    opacity: 0.6;
}

/* ------------------------------------------------------------------
   Blind-stamp seal -- CSS-constructed embossed effect
------------------------------------------------------------------ */
.blind-stamp {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: var(--violet-ink);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow:
        inset 2px 2px 4px rgba(18, 8, 16, 0.8),
        inset -2px -2px 4px rgba(36, 22, 28, 0.6);
    transition: box-shadow 600ms ease-in-out;
    cursor: default;
}

.blind-stamp .stamp-letter {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 700;
    font-size: 2.5rem;
    color: var(--violet-ink);
    text-shadow: 1px 1px 0 var(--dried-blood);
    transition: color 600ms ease-in-out, text-shadow 600ms ease-in-out;
    line-height: 1;
}

.blind-stamp:hover {
    box-shadow:
        inset 2px 2px 4px rgba(212, 168, 74, 0.5),
        inset -2px -2px 4px rgba(212, 168, 74, 0.25);
}

.blind-stamp:hover .stamp-letter {
    color: var(--signal-amber);
    text-shadow: 1px 1px 0 rgba(212, 168, 74, 0.3);
}

@media (pointer: coarse) {
    .blind-stamp {
        box-shadow:
            inset 2px 2px 4px rgba(212, 168, 74, 0.15),
            inset -2px -2px 4px rgba(212, 168, 74, 0.08);
    }
    .blind-stamp .stamp-letter {
        color: rgba(212, 168, 74, 0.3);
    }
}

/* ------------------------------------------------------------------
   Responsive adjustments -- preserve 12% margin discipline
------------------------------------------------------------------ */
@media (max-width: 900px) {
    :root {
        --left-margin: 8%;
        --column-width: 88vw;
        --annex-column-width: 84vw;
    }

    .cable-paragraph.indented {
        margin-left: 32px;
    }

    .header-block {
        padding-top: 20vh;
    }
}

@media (max-width: 540px) {
    :root {
        --left-margin: 6%;
        --column-width: 90vw;
        --annex-column-width: 86vw;
    }

    .cable-column {
        padding-left: 12px;
    }

    .registry-num {
        display: none;
    }
}

/* ------------------------------------------------------------------
   Selection styling -- preserve mood
------------------------------------------------------------------ */
::selection {
    background: var(--carbon-shadow);
    color: var(--worn-vellum);
}