/* ============================================================
   mujun.day -- paper-craft pop-up book
   Pastel layered-depth, fold-reveal, cut-out windows
   ============================================================ */

:root {
    --lavender-paper: #E8E0F0;
    --mint-paper: #D8F0E0;
    --peach-paper: #F8E0D8;
    --lemon-paper: #F8F0D0;
    --sky-paper: #D8E8F8;
    --craft-brown: #3A3028;
    --card-shadow: rgba(0, 0, 0, 0.08);
    --card-shadow-deep: rgba(0, 0, 0, 0.15);
    --paper-edge-light: rgba(255, 255, 255, 0.55);
    --paper-edge-dark: rgba(58, 48, 40, 0.10);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Nunito', sans-serif;
    font-weight: 400;
    font-size: clamp(14px, 1vw, 17px);
    line-height: 1.7;
    color: var(--craft-brown);
    background: var(--lavender-paper);
    overflow-x: hidden;
    min-height: 100vh;
    perspective: 1200px;
    perspective-origin: 50% 30%;
}

/* Paper grain overlay -- subtle dot fiber */
.paper-grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.35;
    background-image:
        radial-gradient(rgba(58, 48, 40, 0.18) 0.6px, transparent 0.6px),
        radial-gradient(rgba(58, 48, 40, 0.10) 0.4px, transparent 0.4px);
    background-size: 5px 5px, 3px 3px;
    background-position: 0 0, 1px 1px;
    mix-blend-mode: multiply;
}

/* ============================================================
   HERO: layered paper depth pop-up spread
   ============================================================ */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 640px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(180deg, #F0E8F4 0%, var(--lavender-paper) 60%, #E0E8F0 100%);
}

.depth-stage {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    perspective: 1000px;
    perspective-origin: 50% 50%;
}

.layer {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    will-change: transform;
}

/* Background layer -- pastel sky with cloud cut-outs */
.layer-background {
    transform: translateZ(-80px) scale(1.08);
    z-index: 1;
}

.sky-clouds {
    width: 100%;
    height: 100%;
    display: block;
    filter: drop-shadow(0 4px 8px var(--card-shadow));
}

/* Midground layer -- paper mountain range */
.layer-midground {
    transform: translateZ(-30px) scale(1.03);
    z-index: 2;
    bottom: 0;
    top: auto;
    height: 55%;
    display: flex;
    align-items: flex-end;
}

.paper-mountains {
    width: 100%;
    height: 100%;
    display: block;
    filter: drop-shadow(0 6px 12px var(--card-shadow));
}

/* Foreground layer -- cut-out window cards */
.layer-foreground {
    transform: translateZ(0);
    z-index: 3;
    pointer-events: none;
}

.paper-card-window {
    position: absolute;
    background: var(--peach-paper);
    box-shadow:
        2px 2px 6px var(--card-shadow),
        -1px -1px 0 var(--paper-edge-light) inset,
        2px 0 0 var(--paper-edge-dark) inset;
    border-radius: 6px;
    overflow: hidden;
}

.window-content {
    width: 100%;
    height: 100%;
    background: var(--mint-paper);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Caveat', cursive;
    font-weight: 700;
    color: var(--craft-brown);
    font-size: 22px;
}

.peek-emoji {
    transform: rotate(-6deg);
}

.window-circle {
    width: 130px;
    height: 130px;
    top: 16%;
    left: 6%;
    border-radius: 50%;
    transform: rotate(-7deg);
    background: var(--lemon-paper);
}
.window-circle .window-content {
    background: var(--sky-paper);
    border-radius: 50%;
    clip-path: circle(45% at 50% 50%);
}

.window-star {
    width: 150px;
    height: 150px;
    top: 18%;
    right: 7%;
    transform: rotate(8deg);
    background: var(--mint-paper);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}
.window-star .window-content {
    background: var(--peach-paper);
    clip-path: polygon(50% 12%, 60% 38%, 88% 38%, 66% 56%, 75% 84%, 50% 66%, 25% 84%, 34% 56%, 12% 38%, 40% 38%);
}

.window-rounded {
    width: 170px;
    height: 110px;
    bottom: 22%;
    left: 9%;
    border-radius: 14px;
    transform: rotate(4deg);
    background: var(--sky-paper);
}
.window-rounded .window-content {
    background: var(--lemon-paper);
    border-radius: 8px;
}

/* Logotype label -- handwritten, taped to glass */
.logo-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-2deg) scale(0.4);
    background: #FFFEF8;
    padding: 36px 56px 28px;
    border-radius: 4px;
    box-shadow:
        0 12px 36px rgba(58, 48, 40, 0.18),
        0 4px 8px var(--card-shadow);
    z-index: 10;
    text-align: center;
    opacity: 0;
    transition: transform 600ms cubic-bezier(0.34, 1.56, 0.64, 1), opacity 400ms ease-out;
}

.logo-label.bounced {
    transform: translate(-50%, -50%) rotate(-2deg) scale(1);
    opacity: 1;
}

.logo-tape {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-160%) rotate(-8deg);
    width: 70px;
    height: 26px;
    background: rgba(248, 224, 216, 0.7);
    border-left: 1px dashed rgba(58, 48, 40, 0.18);
    border-right: 1px dashed rgba(58, 48, 40, 0.18);
}

.logo-tape-right {
    transform: translateX(60%) rotate(6deg);
    background: rgba(216, 240, 224, 0.7);
}

.logotype {
    font-family: 'Caveat', cursive;
    font-weight: 700;
    font-size: clamp(48px, 7vw, 96px);
    color: var(--craft-brown);
    line-height: 1;
    letter-spacing: -1px;
}

.logo-dot {
    color: #C85040;
    display: inline-block;
    transform: scale(1.2);
}

.tagline {
    font-family: 'Quicksand', sans-serif;
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(58, 48, 40, 0.65);
    margin-top: 6px;
}

/* Scroll prompt -- paper arrow */
.scroll-prompt {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 11;
    animation: paperBob 2.6s ease-in-out infinite;
    opacity: 0;
    transition: opacity 600ms ease-out 800ms;
}

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

.scroll-prompt-text {
    font-family: 'Caveat', cursive;
    font-weight: 700;
    font-size: 22px;
    color: var(--craft-brown);
}

.scroll-arrow {
    width: 22px;
    height: 30px;
}

@keyframes paperBob {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   FOLD-REVEAL PANELS
   ============================================================ */
.folds {
    position: relative;
    padding: 80px 24px 120px;
    background:
        linear-gradient(180deg, var(--lavender-paper) 0%, #F0E8E8 50%, var(--lavender-paper) 100%);
    display: flex;
    flex-direction: column;
    gap: 56px;
    align-items: center;
    perspective: 1400px;
}

.fold-panel {
    width: min(720px, 92vw);
    transform-origin: top center;
    transform: rotateX(90deg);
    transition: transform 700ms cubic-bezier(0.16, 1, 0.3, 1), box-shadow 700ms ease-out;
    box-shadow:
        0 18px 28px rgba(58, 48, 40, 0.20),
        0 4px 8px var(--card-shadow);
    border-radius: 6px;
    cursor: pointer;
    will-change: transform;
}

.fold-panel.open {
    transform: rotateX(0deg);
    box-shadow:
        0 4px 10px var(--card-shadow),
        0 1px 3px var(--card-shadow);
}

/* Mid-fold shadow flash via animation key */
.fold-panel.opening {
    animation: foldShadow 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes foldShadow {
    0% {
        box-shadow:
            0 18px 28px rgba(58, 48, 40, 0.20),
            0 4px 8px var(--card-shadow);
    }
    50% {
        box-shadow:
            0 28px 40px rgba(58, 48, 40, 0.30),
            0 8px 16px rgba(58, 48, 40, 0.16);
    }
    100% {
        box-shadow:
            0 4px 10px var(--card-shadow),
            0 1px 3px var(--card-shadow);
    }
}

.fold-panel-inner {
    position: relative;
    padding: 44px 48px 40px;
    border-radius: 6px;
    background: var(--peach-paper);
    box-shadow:
        2px 0 0 var(--paper-edge-dark) inset,
        -1px 0 0 var(--paper-edge-light) inset,
        0 -1px 0 var(--paper-edge-light) inset;
}

.fold-panel[data-color="peach"] .fold-panel-inner {
    background: var(--peach-paper);
}
.fold-panel[data-color="mint"] .fold-panel-inner {
    background: var(--mint-paper);
}
.fold-panel[data-color="lemon"] .fold-panel-inner {
    background: var(--lemon-paper);
}
.fold-panel[data-color="sky"] .fold-panel-inner {
    background: var(--sky-paper);
}

/* Decorative numbered tab */
.fold-tab {
    position: absolute;
    top: -16px;
    left: 32px;
    width: 56px;
    height: 32px;
    background: #FFFEF8;
    border-radius: 4px 4px 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Quicksand', sans-serif;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: var(--craft-brown);
    box-shadow: 0 -2px 6px var(--card-shadow);
    transform: rotate(-2deg);
}

.fold-title {
    font-family: 'Caveat', cursive;
    font-weight: 700;
    font-size: clamp(28px, 4vw, 52px);
    line-height: 1.1;
    margin-bottom: 14px;
    color: var(--craft-brown);
}

.fold-body {
    font-family: 'Nunito', sans-serif;
    font-size: clamp(15px, 1.05vw, 17px);
    line-height: 1.75;
    color: var(--craft-brown);
    max-width: 560px;
}

.fold-meta {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.meta-chip {
    font-family: 'Quicksand', sans-serif;
    font-weight: 500;
    font-size: 12px;
    letter-spacing: 0.06em;
    padding: 4px 12px;
    border-radius: 12px;
    background: rgba(255, 254, 248, 0.7);
    color: var(--craft-brown);
    border: 1px dashed rgba(58, 48, 40, 0.20);
}

.layer-swatch-row {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.layer-swatch {
    font-family: 'Quicksand', sans-serif;
    font-weight: 500;
    font-size: 12px;
    letter-spacing: 0.05em;
    padding: 6px 14px;
    border-radius: 4px;
    background: var(--c);
    color: var(--craft-brown);
    box-shadow: 1px 1px 3px var(--card-shadow), -1px -1px 0 var(--paper-edge-light) inset;
}

/* Cut-out window demo */
.window-demo {
    margin-top: 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.demo-stack {
    position: relative;
    width: 100%;
    max-width: 440px;
    aspect-ratio: 16 / 7;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: inset 0 0 0 1px var(--paper-edge-dark);
}

.demo-back {
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(45deg, var(--mint-paper) 0 14px, #C8E8D8 14px 28px);
}

.demo-mid {
    position: absolute;
    inset: 8% 6%;
    background: var(--sky-paper);
    border-radius: 4px;
    box-shadow: 1px 1px 4px var(--card-shadow);
}

.demo-front {
    position: absolute;
    inset: 0;
    background: var(--peach-paper);
    box-shadow: inset 0 0 0 1px var(--paper-edge-dark);
    transition: clip-path 500ms cubic-bezier(0.16, 1, 0.3, 1);
    /* default circle window */
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 0,
        50% 50%,
        50% 25%, 73% 31%, 73% 69%, 50% 75%, 27% 69%, 27% 31%, 50% 25%,
        50% 50%, 0 0);
}

.demo-front[data-shape="circle"] {
    clip-path: polygon(
        0 0, 100% 0, 100% 100%, 0 100%, 0 50%,
        20% 50%,
        20% 30%, 35% 18%, 65% 18%, 80% 30%, 80% 70%, 65% 82%, 35% 82%, 20% 70%, 20% 50%,
        0 50%, 0 0
    );
}

.demo-front[data-shape="rounded"] {
    clip-path: polygon(
        0 0, 100% 0, 100% 100%, 0 100%, 0 50%,
        20% 50%,
        20% 25%, 25% 18%, 75% 18%, 80% 25%, 80% 75%, 75% 82%, 25% 82%, 20% 75%, 20% 50%,
        0 50%, 0 0
    );
}

.demo-front[data-shape="star"] {
    clip-path: polygon(
        0 0, 100% 0, 100% 100%, 0 100%, 0 50%,
        50% 18%,
        56% 38%, 78% 38%, 60% 52%, 67% 76%, 50% 62%, 33% 76%, 40% 52%, 22% 38%, 44% 38%, 50% 18%,
        0 50%, 0 0
    );
}

.demo-button,
.refold-button,
.demo-button:focus,
.refold-button:focus {
    align-self: flex-start;
    font-family: 'Quicksand', sans-serif;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 10px 22px;
    border: 1px dashed rgba(58, 48, 40, 0.30);
    border-radius: 4px;
    background: rgba(255, 254, 248, 0.85);
    color: var(--craft-brown);
    cursor: pointer;
    box-shadow: 1px 1px 3px var(--card-shadow);
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
    outline: none;
}

.demo-button:hover,
.refold-button:hover {
    transform: translate(-1px, -1px) rotate(-1deg);
    box-shadow: 2px 2px 6px var(--card-shadow-deep);
    background: #FFFEF8;
}

.demo-button:active,
.refold-button:active {
    transform: translate(0, 0);
    box-shadow: 1px 1px 2px var(--card-shadow);
}

.refold-button {
    margin-top: 22px;
}

/* Day stamp -- looks like a rubber stamp on paper */
.day-stamp {
    margin-top: 24px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 32px;
    border: 2px solid var(--craft-brown);
    border-radius: 6px;
    transform: rotate(-3deg);
    background: rgba(255, 254, 248, 0.4);
    box-shadow: inset 0 0 0 4px rgba(58, 48, 40, 0.05);
}

.day-stamp-label {
    font-family: 'Quicksand', sans-serif;
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--craft-brown);
    opacity: 0.7;
}

.day-stamp-date {
    font-family: 'Caveat', cursive;
    font-weight: 700;
    font-size: 32px;
    line-height: 1;
    color: var(--craft-brown);
}

/* ============================================================
   FOOTER
   ============================================================ */
.paper-footer {
    padding: 60px 24px 80px;
    display: flex;
    justify-content: center;
    background: var(--lavender-paper);
}

.footer-card {
    position: relative;
    background: #FFFEF8;
    padding: 28px 44px;
    border-radius: 4px;
    box-shadow: 0 6px 18px rgba(58, 48, 40, 0.14), 0 2px 4px var(--card-shadow);
    transform: rotate(1.5deg);
    text-align: center;
    max-width: 460px;
}

.footer-tape {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%) rotate(2deg);
    width: 100px;
    height: 22px;
    background: rgba(248, 240, 208, 0.75);
    border-left: 1px dashed rgba(58, 48, 40, 0.18);
    border-right: 1px dashed rgba(58, 48, 40, 0.18);
}

.footer-credit {
    font-family: 'Caveat', cursive;
    font-weight: 700;
    font-size: 26px;
    color: var(--craft-brown);
    line-height: 1.1;
}

.footer-domain {
    color: #C85040;
}

.footer-sub {
    font-family: 'Quicksand', sans-serif;
    font-weight: 500;
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(58, 48, 40, 0.6);
    margin-top: 6px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 760px) {
    .window-circle {
        width: 90px;
        height: 90px;
        top: 14%;
        left: 4%;
    }
    .window-star {
        width: 100px;
        height: 100px;
        top: 16%;
        right: 4%;
    }
    .window-rounded {
        width: 120px;
        height: 78px;
        bottom: 24%;
        left: 6%;
    }
    .window-content {
        font-size: 16px;
    }
    .fold-panel-inner {
        padding: 36px 28px 32px;
    }
    .layer-midground {
        height: 50%;
    }
}

@media (max-width: 480px) {
    .logo-label {
        padding: 28px 36px 22px;
    }
    .logotype {
        font-size: clamp(40px, 12vw, 64px);
    }
    .window-circle,
    .window-star {
        display: none;
    }
    .window-rounded {
        width: 110px;
        height: 70px;
        bottom: 18%;
        left: 5%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .scroll-prompt {
        animation: none;
    }
    .fold-panel,
    .fold-panel.opening {
        transition: none;
        animation: none;
    }
    .logo-label {
        transition: opacity 200ms ease-out;
    }
}