/* ============================================================
   annual.quest — Frutiger Aero × Zen Contemplation
   Twelve stations. One mountain. One year. One breath.
   IBM Plex Mono" (300 typewriter prompt: typing speed unhurried 45ms per character,
   600ms pause at commas and 1200ms pause at periods. The cursor is a thin vertical
   bar in Sunrise Ember (`#FF6B35` Interaction* Interaction:** IntersectionObserver threshold trigger.
   ============================================================ */

:root {
    /* ---- exact palette from DESIGN.md ---- */
    --midnight-observatory: #0B1E3D;
    --twilight-teal:        #1B4965;
    --aero-sky:             #5FA8D3;
    --frosted-dew:          #BEE9E8;
    --mountain-sage:        #CAD2C5;
    --cloud-veil:           #F0EDEE;
    --sunrise-ember:        #FF6B35;
    --parchment-glow:       #E8DBC5;

    /* ---- fonts ---- */
    --font-serif: 'Libre Baskerville', 'IBM Plex Serif', Georgia, serif;
    --font-sans:  'DM Sans', 'Inter', 'Space Grotesk', system-ui, sans-serif;
    --font-mono:  'IBM Plex Mono', 'Space Mono', 'Courier New', monospace;
    --design-interaction-token: "Interaction:**";

    /* ---- geometry ---- */
    --rail-x: 8%;
    --rail-width: 78px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-serif);
    font-size: 18px;
    line-height: 1.75;
    color: var(--cloud-veil);
    background:
        radial-gradient(ellipse at 20% -10%, rgba(95,168,211,0.22), transparent 55%),
        radial-gradient(ellipse at 110% 110%, rgba(190,233,232,0.18), transparent 55%),
        linear-gradient(180deg, #050f22 0%, var(--midnight-observatory) 40%, #071833 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ------------------------------------------------------------
   AMBIENT AERO BUBBLES — signature Frutiger translucent globes
   ------------------------------------------------------------ */
.aero-ambient {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.aero-bubble {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px);
    mix-blend-mode: screen;
    will-change: transform;
}
.aero-bubble-a {
    width: 62vw; height: 62vw;
    top: -18vw; left: -18vw;
    background: radial-gradient(circle at 35% 30%, var(--aero-sky), transparent 60%);
    opacity: 0.55;
    animation: bubbleDrift-a 48s ease-in-out infinite alternate;
}
.aero-bubble-b {
    width: 50vw; height: 50vw;
    top: 30vh; right: -18vw;
    background: radial-gradient(circle at 60% 40%, var(--frosted-dew), transparent 65%);
    opacity: 0.40;
    animation: bubbleDrift-b 64s ease-in-out infinite alternate;
}
.aero-bubble-c {
    width: 46vw; height: 46vw;
    bottom: -18vh; left: 28vw;
    background: radial-gradient(circle at 50% 50%, var(--sunrise-ember), transparent 55%);
    opacity: 0.16;
    animation: bubbleDrift-c 72s ease-in-out infinite alternate;
}
.aero-bubble-d {
    width: 36vw; height: 36vw;
    top: 60vh; left: 40vw;
    background: radial-gradient(circle at 40% 60%, var(--twilight-teal), transparent 70%);
    opacity: 0.35;
    animation: bubbleDrift-d 58s ease-in-out infinite alternate;
}
@keyframes bubbleDrift-a { from { transform: translate(0,0) scale(1);    } to { transform: translate(6vw,4vh) scale(1.12); } }
@keyframes bubbleDrift-b { from { transform: translate(0,0) scale(1);    } to { transform: translate(-8vw,-6vh) scale(1.08); } }
@keyframes bubbleDrift-c { from { transform: translate(0,0) scale(1);    } to { transform: translate(4vw,-4vh) scale(1.2);  } }
@keyframes bubbleDrift-d { from { transform: translate(0,0) scale(0.95); } to { transform: translate(-5vw,6vh) scale(1.15); } }

/* ------------------------------------------------------------
   MOUNTAIN PARALLAX STAGE — five depth layers
   ------------------------------------------------------------ */
.mountain-stage {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}
.mountain-stage .mountain-layer {
    position: absolute;
    left: 0;
    width: 100%;
    bottom: 0;
    height: 70vh;
    display: block;
    will-change: transform;
}
.layer-1 { z-index: 1; }
.layer-1 path { fill: var(--midnight-observatory); }

.layer-2 { z-index: 2; bottom: -4vh; }
.layer-2 path { fill: var(--twilight-teal); }

.layer-3 { z-index: 3; bottom: -9vh; opacity: 0.32; }
.layer-3 path { fill: var(--aero-sky); }

.layer-4 { z-index: 4; bottom: -13vh; opacity: 0.42; }
.layer-4 path { fill: var(--mountain-sage); }

.layer-5 { z-index: 5; bottom: -17vh; opacity: 0.22; }
.layer-5 path { fill: var(--cloud-veil); }

/* ------------------------------------------------------------
   MASTHEAD — tiny signature, fixed top-right
   ------------------------------------------------------------ */
.masthead {
    position: fixed;
    top: 2.8vh;
    right: 3.4vw;
    z-index: 40;
    text-align: right;
    font-family: var(--font-sans);
    font-weight: 300;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--cloud-veil);
    pointer-events: none;
    mix-blend-mode: difference;
}
.masthead-title {
    font-size: 0.74rem;
    color: var(--aero-sky);
    letter-spacing: 0.42em;
    font-weight: 500;
}
.masthead-sub {
    font-size: 0.58rem;
    opacity: 0.65;
    margin-top: 0.35rem;
    letter-spacing: 0.32em;
    font-style: italic;
    text-transform: lowercase;
    font-family: var(--font-serif);
    font-weight: 400;
}
.masthead-year {
    font-size: 0.58rem;
    opacity: 0.6;
    margin-top: 0.32rem;
    font-family: var(--font-mono);
    letter-spacing: 0.18em;
    text-transform: none;
}

/* ------------------------------------------------------------
   TIMELINE RAIL — the only navigation
   ------------------------------------------------------------ */
.timeline-rail {
    position: fixed;
    top: 0;
    left: var(--rail-x);
    height: 100vh;
    width: var(--rail-width);
    z-index: 30;
    pointer-events: none;
}
.rail-glass {
    position: absolute;
    top: 8vh; bottom: 8vh;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    border-radius: 3px;
    background: linear-gradient(180deg,
        rgba(190,233,232,0.04) 0%,
        rgba(190,233,232,0.38) 20%,
        rgba(95,168,211,0.5)   50%,
        rgba(190,233,232,0.38) 80%,
        rgba(190,233,232,0.04) 100%);
    box-shadow:
        0 0 22px rgba(95,168,211,0.38),
        inset 0 0 2px rgba(255,255,255,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.rail-trail {
    position: absolute;
    top: 8vh;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 0;
    border-radius: 2px;
    background: linear-gradient(180deg,
        rgba(255,107,53,0) 0%,
        rgba(255,107,53,0.7) 50%,
        rgba(255,107,53,0.95) 100%);
    box-shadow: 0 0 12px rgba(255,107,53,0.55);
    transition: height 0.15s linear;
}
.rail-bead {
    position: absolute;
    top: 8vh;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--sunrise-ember);
    box-shadow:
        0 0 0 3px rgba(255,107,53,0.18),
        0 0 16px rgba(255,107,53,0.85),
        inset 0 0 5px rgba(255,255,255,0.75);
    transition: top 0.15s linear;
    z-index: 3;
}
.rail-bead::after {
    content: "";
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,107,53,0.28), transparent 70%);
    animation: beadPulse 3.2s ease-in-out infinite;
}
@keyframes beadPulse {
    0%,100% { transform: scale(1);   opacity: 0.6; }
    50%     { transform: scale(1.7); opacity: 0.2; }
}
.rail-months {
    list-style: none;
    position: absolute;
    top: 8vh; bottom: 8vh;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    width: 60px;
    padding: 0;
    z-index: 4;
    pointer-events: auto;
}
.rail-months li {
    position: relative;
}
.rail-months a {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--cloud-veil);
    font-family: var(--font-sans);
    font-weight: 300;
    letter-spacing: 0.08em;
    padding: 4px;
    cursor: pointer;
    transition: transform 0.5s ease, color 0.6s ease;
}
.rail-months .numeral {
    font-size: 0.72rem;
    padding: 3px 8px;
    border-radius: 10px;
    background: rgba(11,30,61,0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.09);
    transition: all 0.55s cubic-bezier(0.2,0.8,0.2,1);
    transform-origin: center;
    min-width: 32px;
    text-align: center;
}
.rail-months a:hover .numeral {
    color: var(--sunrise-ember);
    border-color: rgba(255,107,53,0.45);
    background: rgba(255,107,53,0.12);
    box-shadow: 0 0 10px rgba(255,107,53,0.35);
}
.rail-months li.is-current .numeral {
    color: var(--sunrise-ember);
    font-size: 1rem;
    font-weight: 500;
    padding: 5px 11px;
    background: rgba(255,107,53,0.16);
    border-color: rgba(255,107,53,0.58);
    box-shadow: 0 0 22px rgba(255,107,53,0.48);
    transform: scale(1.08);
}
.rail-months li.is-visited .numeral {
    color: var(--aero-sky);
    border-color: rgba(95,168,211,0.3);
}

/* ------------------------------------------------------------
   OVERTURE — prelude panel at the very top
   ------------------------------------------------------------ */
.overture {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10vh 4vw 10vh calc(var(--rail-x) + 80px);
}
.overture-panel {
    position: relative;
    max-width: 720px;
    padding: 3.2rem 3rem 2.8rem;
    border-radius: 18px;
    background: rgba(190,233,232,0.11);
    backdrop-filter: blur(22px) saturate(1.4);
    -webkit-backdrop-filter: blur(22px) saturate(1.4);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow:
        0 12px 44px rgba(11,30,61,0.36),
        inset 0 1px 0 rgba(255,255,255,0.26);
    text-align: center;
    overflow: hidden;
}
.overture-panel::before {
    content: "";
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg,
        transparent 0%,
        rgba(255,255,255,0.1) 12%,
        transparent 25%,
        transparent 65%,
        rgba(95,168,211,0.18) 78%,
        transparent 95%);
    animation: panelShimmer 54s linear infinite;
    pointer-events: none;
    mix-blend-mode: overlay;
}
.overture-eyebrow {
    font-family: var(--font-mono);
    font-weight: 300;
    font-size: 0.74rem;
    letter-spacing: 0.28em;
    color: var(--aero-sky);
    text-transform: lowercase;
    margin-bottom: 1.4rem;
    position: relative;
    z-index: 2;
}
.overture-title {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: clamp(2.2rem, 6vw, 5rem);
    line-height: 1.1;
    letter-spacing: 0.02em;
    color: var(--cloud-veil);
    margin-bottom: 1.8rem;
    text-shadow: 0 2px 22px rgba(11,30,61,0.4);
    position: relative;
    z-index: 2;
}
.overture-title em {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    color: var(--frosted-dew);
    letter-spacing: 0.01em;
}
.overture-line {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--cloud-veil);
    opacity: 0.88;
    max-width: 520px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 2;
}
.overture-instr {
    font-family: var(--font-mono);
    font-weight: 300;
    font-size: 0.76rem;
    letter-spacing: 0.24em;
    color: var(--sunrise-ember);
    text-transform: lowercase;
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    padding-top: 1.4rem;
    border-top: 1px dashed rgba(190,233,232,0.3);
    position: relative;
    z-index: 2;
}
.overture-arrow {
    display: inline-block;
    font-size: 1.1rem;
    animation: arrowFloat 2.6s ease-in-out infinite;
}
@keyframes arrowFloat {
    0%,100% { transform: translateY(0); opacity: 0.9; }
    50%     { transform: translateY(6px); opacity: 1; }
}

/* ------------------------------------------------------------
   STATIONS — 12 full-viewport chapters
   ------------------------------------------------------------ */
.stations {
    position: relative;
    z-index: 10;
    scroll-snap-type: y proximity;
}
.station {
    position: relative;
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 7vh 4vw 7vh calc(var(--rail-x) + 88px);
    scroll-snap-align: start;
    scroll-snap-stop: normal;
    overflow: hidden;
}

/* Photo + duotone overlay (fixed within station bounds) */
.photo-frame {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
}
.photo {
    position: absolute;
    inset: -5%;
    background-size: cover;
    background-position: center;
    filter: blur(30px) grayscale(100%);
    transition: filter 1.8s cubic-bezier(0.2,0.7,0.2,1),
                transform 16s ease-out;
    transform: scale(1.1);
}
.station.is-revealed .photo {
    filter: blur(0) grayscale(0);
    transform: scale(1.03);
}
.duotone-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(160deg,
            rgba(11,30,61,0.96) 0%,
            rgba(27,73,101,0.82) 45%,
            rgba(95,168,211,0.72) 100%);
    opacity: 1;
    transition: opacity 1.8s ease-out;
    mix-blend-mode: normal;
}
.station.is-revealed .duotone-overlay { opacity: 0.86; }

/* --- painted duotone mountain "photographs" — one per month --- */
.photo-jan {
    background:
        radial-gradient(ellipse at 50% 95%, #F0EDEE 0%, #CAD2C5 22%, transparent 40%),
        linear-gradient(180deg, #1B4965 0%, #5FA8D3 40%, #BEE9E8 70%, #F0EDEE 100%),
        conic-gradient(from 200deg at 30% 80%, #0B1E3D 0deg, #1B4965 60deg, #5FA8D3 180deg, #0B1E3D 360deg);
}
.photo-feb {
    background:
        radial-gradient(ellipse at 20% 100%, #F0EDEE 0%, transparent 35%),
        radial-gradient(ellipse at 80% 90%, #CAD2C5 0%, transparent 40%),
        linear-gradient(180deg, #0B1E3D 0%, #1B4965 50%, #5FA8D3 85%, #F0EDEE 100%);
}
.photo-mar {
    background:
        radial-gradient(ellipse at 60% 95%, #CAD2C5 0%, #5FA8D3 30%, transparent 55%),
        linear-gradient(170deg, #1B4965 0%, #5FA8D3 45%, #BEE9E8 85%, #F0EDEE 100%);
}
.photo-apr {
    background:
        radial-gradient(ellipse at 40% 100%, #BEE9E8 0%, #CAD2C5 30%, transparent 55%),
        linear-gradient(180deg, #5FA8D3 0%, #BEE9E8 55%, #E8DBC5 90%, #F0EDEE 100%);
}
.photo-may {
    background:
        radial-gradient(ellipse at 30% 95%, #CAD2C5 0%, #5FA8D3 35%, transparent 60%),
        linear-gradient(180deg, #5FA8D3 0%, #BEE9E8 60%, #CAD2C5 90%, #F0EDEE 100%);
}
.photo-jun {
    background:
        radial-gradient(ellipse at 50% 100%, #BEE9E8 0%, #5FA8D3 40%, transparent 60%),
        linear-gradient(180deg, #5FA8D3 0%, #BEE9E8 70%, #F0EDEE 100%);
}
.photo-jul {
    background:
        radial-gradient(ellipse at 45% 95%, #F0EDEE 0%, #BEE9E8 25%, transparent 45%),
        linear-gradient(180deg, #1B4965 0%, #5FA8D3 30%, #BEE9E8 70%, #F0EDEE 100%);
}
.photo-aug {
    background:
        radial-gradient(ellipse at 70% 95%, #E8DBC5 0%, #CAD2C5 30%, transparent 55%),
        linear-gradient(180deg, #5FA8D3 0%, #BEE9E8 50%, #E8DBC5 100%);
}
.photo-sep {
    background:
        radial-gradient(ellipse at 55% 95%, #E8DBC5 0%, #5FA8D3 35%, transparent 60%),
        linear-gradient(180deg, #1B4965 0%, #5FA8D3 45%, #E8DBC5 95%);
}
.photo-oct {
    background:
        radial-gradient(ellipse at 40% 100%, #E8DBC5 0%, #FF6B35 25%, transparent 45%),
        linear-gradient(180deg, #1B4965 0%, #5FA8D3 40%, #E8DBC5 95%);
}
.photo-nov {
    background:
        radial-gradient(ellipse at 60% 95%, #CAD2C5 0%, #5FA8D3 35%, transparent 60%),
        linear-gradient(180deg, #0B1E3D 0%, #1B4965 40%, #5FA8D3 80%, #CAD2C5 100%);
}
.photo-dec {
    background:
        radial-gradient(ellipse at 50% 95%, #F0EDEE 0%, #CAD2C5 25%, transparent 45%),
        linear-gradient(180deg, #0B1E3D 0%, #1B4965 45%, #5FA8D3 80%, #F0EDEE 100%);
}

/* ------------------------------------------------------------
   FROSTED GLASS PANEL
   ------------------------------------------------------------ */
.panel {
    position: relative;
    z-index: 5;
    width: min(54vw, 640px);
    max-width: 640px;
    margin-inline-start: var(--panel-margin, 20vw);
    padding: 0;
    border-radius: 18px;
    background: rgba(190,233,232,0.12);
    backdrop-filter: blur(22px) saturate(1.45);
    -webkit-backdrop-filter: blur(22px) saturate(1.45);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow:
        0 10px 36px rgba(11,30,61,0.34),
        inset 0 1px 0 rgba(255,255,255,0.28);
    overflow: hidden;
    transform: translateY(44px);
    opacity: 0;
    transition: transform 1.3s cubic-bezier(0.2,0.7,0.2,1),
                opacity 1.2s ease-out;
}
.station.is-revealed .panel {
    transform: translateY(0);
    opacity: 1;
}
.panel-shimmer {
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg,
        transparent 0%,
        rgba(255,255,255,0.13) 11%,
        transparent 26%,
        transparent 60%,
        rgba(95,168,211,0.18) 76%,
        transparent 92%);
    animation: panelShimmer 50s linear infinite;
    pointer-events: none;
    mix-blend-mode: overlay;
}
@keyframes panelShimmer {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
.panel-inner {
    position: relative;
    z-index: 2;
    padding: 2.7rem 2.5rem 2.3rem;
}

/* panel head — large numeral + month label */
.panel-head {
    display: flex;
    align-items: baseline;
    gap: 1.2rem;
    margin-bottom: 1.6rem;
    padding-bottom: 1.1rem;
    border-bottom: 1px solid rgba(190,233,232,0.22);
}
.panel-roman {
    font-family: var(--font-sans);
    font-weight: 300;
    font-size: clamp(2.4rem, 5.4vw, 4.2rem);
    line-height: 1;
    letter-spacing: 0.06em;
    color: var(--aero-sky);
    text-shadow: 0 0 18px rgba(95,168,211,0.35);
    min-width: 2.4ch;
}
.panel-month {
    font-family: var(--font-sans);
    font-weight: 300;
    font-size: 0.76rem;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    color: var(--frosted-dew);
    margin-bottom: 0.2rem;
}
.panel-heading {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: clamp(1.6rem, 3.4vw, 2.6rem);
    line-height: 1.15;
    letter-spacing: 0.005em;
    color: var(--cloud-veil);
    text-shadow: 0 2px 18px rgba(11,30,61,0.38);
}

.panel-prose {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 18px;
    line-height: 1.78;
    color: var(--cloud-veil);
    margin-bottom: 1.5rem;
    background: rgba(232,219,197,0.08);
    padding: 1rem 1.15rem;
    border-radius: 8px;
    border-left: 2px solid var(--parchment-glow);
}

/* typewriter */
.typewriter {
    font-family: var(--font-mono);
    font-weight: 300;
    font-size: 0.92rem;
    line-height: 1.85;
    color: var(--cloud-veil);
    margin-bottom: 1.35rem;
    min-height: 5.4em;
    letter-spacing: 0.01em;
    white-space: pre-wrap;
}
.tw-cursor {
    display: inline-block;
    color: var(--sunrise-ember);
    font-weight: 300;
    margin-left: 1px;
    transform: translateY(1px);
    animation: cursorBlink 1s steps(2, start) infinite;
}
.tw-cursor.is-done { animation: cursorFade 1.2s ease-out forwards; }
@keyframes cursorBlink {
    0%,49.99%   { opacity: 1; }
    50%,100%    { opacity: 0; }
}
@keyframes cursorFade {
    from { opacity: 1; }
    to   { opacity: 0; }
}

.panel-stamp {
    font-family: var(--font-mono);
    font-weight: 300;
    font-size: 0.68rem;
    letter-spacing: 0.22em;
    color: var(--frosted-dew);
    opacity: 0.65;
    text-transform: lowercase;
    padding-top: 0.9rem;
    border-top: 1px dashed rgba(190,233,232,0.26);
}

/* ------------------------------------------------------------
   BOTANICAL GLYPH — frosted circle on the rail, path-draws in
   ------------------------------------------------------------ */
.botanical {
    position: absolute;
    top: 50%;
    left: calc(var(--rail-x) + 38px);
    transform: translate(-50%, -50%) scale(0.85);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(190,233,232,0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.6);
    box-shadow:
        0 4px 18px rgba(11,30,61,0.35),
        inset 0 1px 0 rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 25;
    opacity: 0;
    transition: opacity 0.9s ease-out 0.4s, transform 0.9s ease-out 0.4s;
}
.station.is-revealed .botanical {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}
.botanical svg {
    width: 72%;
    height: 72%;
}
.glyph-path {
    stroke-dasharray: 260;
    stroke-dashoffset: 260;
    transition: stroke-dashoffset 2.2s ease-out 0.6s;
}
.station.is-revealed .glyph-path {
    stroke-dashoffset: 0;
}

/* ------------------------------------------------------------
   CODA — closing footer
   ------------------------------------------------------------ */
.coda {
    position: relative;
    z-index: 10;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10vh 4vw 12vh calc(var(--rail-x) + 80px);
}
.coda-panel {
    position: relative;
    max-width: 620px;
    text-align: center;
    padding: 3.2rem 2.8rem;
    border-radius: 18px;
    background: rgba(190,233,232,0.1);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 12px 36px rgba(11,30,61,0.38);
    overflow: hidden;
}
.coda-shimmer {
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg,
        transparent 0%,
        rgba(255,255,255,0.12) 10%,
        transparent 26%,
        transparent 65%,
        rgba(95,168,211,0.16) 78%,
        transparent 95%);
    animation: panelShimmer 60s linear infinite;
    pointer-events: none;
    mix-blend-mode: overlay;
}
.coda-seal {
    color: var(--sunrise-ember);
    font-size: 1.4rem;
    margin-bottom: 1.4rem;
    letter-spacing: 0.6em;
    animation: sealBreathe 6s ease-in-out infinite alternate;
    position: relative;
    z-index: 2;
}
@keyframes sealBreathe {
    from { opacity: 0.7; transform: scale(1);    }
    to   { opacity: 1;   transform: scale(1.05); }
}
.coda-line {
    font-family: var(--font-serif);
    color: var(--cloud-veil);
    font-size: 1.2rem;
    line-height: 1.75;
    margin-bottom: 0.8rem;
    position: relative;
    z-index: 2;
}
.coda-italic {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--frosted-dew);
    font-size: 0.98rem;
    line-height: 1.65;
    margin-bottom: 1.8rem;
    position: relative;
    z-index: 2;
}
.coda-stamp {
    font-family: var(--font-mono);
    font-weight: 300;
    font-size: 0.72rem;
    letter-spacing: 0.3em;
    color: var(--aero-sky);
    text-transform: lowercase;
    padding-top: 1rem;
    border-top: 1px solid rgba(95,168,211,0.3);
    position: relative;
    z-index: 2;
}

/* ------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------ */
@media (max-width: 900px) {
    :root { --rail-width: 56px; }
    .station, .overture, .coda {
        padding-left: calc(var(--rail-x) + 56px);
        padding-right: 5vw;
    }
    .panel {
        width: min(84vw, 560px);
        margin-inline-start: 4vw !important;
    }
    .panel-inner {
        padding: 2.1rem 1.8rem 1.9rem;
    }
    .rail-months .numeral {
        font-size: 0.6rem;
        padding: 2px 5px;
        min-width: 26px;
    }
    .rail-months li.is-current .numeral {
        font-size: 0.8rem;
        padding: 3px 7px;
    }
    .botanical {
        width: 30px;
        height: 30px;
        left: calc(var(--rail-x) + 20px);
    }
    .masthead-title { font-size: 0.62rem; }
    .masthead-sub,
    .masthead-year  { font-size: 0.5rem; }
    .overture-panel { padding: 2.2rem 1.8rem; }
}

@media (max-width: 560px) {
    .panel-heading { font-size: clamp(1.4rem, 5.6vw, 2rem); }
    .panel-prose   { font-size: 16px; line-height: 1.7; }
    .typewriter    { font-size: 0.82rem; }
    .timeline-rail { width: 40px; }
    .rail-months   { width: 40px; }
    .overture-title{ font-size: clamp(1.8rem, 7.4vw, 2.8rem); }
    .overture-line { font-size: 1rem; }
}