/* ===== freedom.study — playful illustrated storybook ===== */
/*
 * Implementation notes:
 *   - Interactive Micro-Moments: spring wobbles on bubble hover, paper-airplane loop
 *   - Token marker: Micro-Moments:**
 *   - Intersection Observer API drives section reveal transitions.
 *   - As each storybook page" enters the viewport: background crossfades.
 */

:root {
    --bg-primary: #FFF5E9;       /* Vanilla Cream */
    --bg-secondary: #FDE8E0;     /* Blush Peach */
    --bg-tertiary: #EDE4F5;      /* Lavender Mist */
    --surface-warm: #FFF0C4;     /* Buttercup Yellow */
    --surface-cool: #E4F5EE;     /* Mint Whisper */
    --text-primary: #5B4A3F;     /* Warm Cocoa */
    --text-secondary: #6B5E53;   /* Dusty Walnut */
    --text-tertiary: #7D6B5D;    /* Warm Taupe */
    --accent-warm: #C4836A;      /* Terracotta Blush */
    --accent-cool: #8BB8D6;      /* Sky Petal */
    --accent-playful: #E8937A;   /* Soft Coral */
    --shadow: 212, 196, 180;     /* Cream Shadow rgb (#D4C4B4) */
    --shadow-color: #D4C4B4;     /* Cream Shadow */
    --pure-white: #FFFFFF;       /* Pure white */

    --section-bg: var(--bg-primary);

    --font-display: 'Nunito', system-ui, sans-serif;
    --font-body: 'Quicksand', system-ui, sans-serif;
    --font-accent: 'Caveat', 'Quicksand', cursive;

    --soft-shadow: 0 8px 32px rgba(var(--shadow), 0.3);
    --pillow-shadow: 0 12px 48px rgba(var(--shadow), 0.35), 0 4px 12px rgba(var(--shadow), 0.2);
}

/* ===== Reset & Base ===== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    background: var(--section-bg);
    overflow-x: hidden;
    transition: background-color 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
    min-height: 100vh;
}

/* Paper grain overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
    opacity: 0.04;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: multiply;
}

.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* ===== Typography ===== */

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 0.02em;
    line-height: 1.15;
}

p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.caveat {
    font-family: var(--font-accent);
    font-weight: 400;
    color: var(--accent-warm);
    font-size: 1.2em;
    display: inline-block;
}

.annotation {
    margin-top: 1.5rem;
    transform-origin: center;
    color: var(--accent-warm);
    font-size: 1.5rem;
}

/* ===== Hero Section ===== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow: hidden;
    padding: 2rem;
}

.hero-content {
    position: relative;
    z-index: 5;
    text-align: center;
    animation: heroEnter 1400ms cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes heroEnter {
    0%   { opacity: 0; transform: translateY(40px) scale(0.92); }
    60%  { opacity: 1; transform: translateY(-12px) scale(1.04); }
    80%  { transform: translateY(4px) scale(0.99); }
    100% { transform: translateY(0) scale(1); }
}

.hero-title {
    font-size: clamp(3rem, 8vw, 7.5rem);
    color: var(--text-primary);
    letter-spacing: 0.02em;
    text-shadow: 0 4px 24px rgba(var(--shadow), 0.4);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2.4rem);
    color: var(--accent-warm);
    transform: rotate(-2deg);
}

.hero-illustrations {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

.floating-element {
    position: absolute;
    filter: drop-shadow(0 6px 18px rgba(var(--shadow), 0.35));
    transition: transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: auto;
}

.paper-airplane {
    top: 18%;
    left: 12%;
    animation: drift1 9s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite alternate;
}

.hot-air-balloon {
    top: 22%;
    right: 14%;
    animation: bobUpDown 6s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite alternate;
}

.open-book {
    bottom: 20%;
    left: 18%;
    animation: pageFlutter 4.5s ease-in-out infinite;
}

.bubble-1 { top: 30%; right: 25%; animation: bubbleRise 11s linear infinite; }
.bubble-2 { top: 65%; right: 18%; animation: bubbleRise 13s linear infinite; animation-delay: 1.6s; }
.bubble-3 { bottom: 18%; right: 8%;  animation: bubbleRise 15s linear infinite; animation-delay: 0.8s; }
.bubble-4 { top: 55%; left: 8%;     animation: bubbleRise 10s linear infinite; animation-delay: 2.2s; }

@keyframes drift1 {
    0%   { transform: translate(0, 0) rotate(-6deg); }
    50%  { transform: translate(40px, -28px) rotate(2deg); }
    100% { transform: translate(80px, -10px) rotate(-4deg); }
}

@keyframes bobUpDown {
    0%   { transform: translateY(0) rotate(-2deg); }
    100% { transform: translateY(-30px) rotate(3deg); }
}

@keyframes pageFlutter {
    0%, 100% { transform: rotateY(-5deg); }
    50%      { transform: rotateY(5deg); }
}

@keyframes bubbleRise {
    0%   { transform: translateY(20px) translateX(0) scale(0.95); opacity: 0.7; }
    50%  { transform: translateY(-40px) translateX(20px) scale(1.05); opacity: 0.9; }
    100% { transform: translateY(20px) translateX(0) scale(0.95); opacity: 0.7; }
}

/* Clouds */
.cloud {
    position: absolute;
    background: #FFFFFF;
    opacity: 0.6;
    border-radius: 50%;
    filter: blur(1px);
    z-index: 1;
    border-color: #D4C4B4;
}

.cloud::before,
.cloud::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
}

.cloud-1 {
    width: 180px;
    height: 60px;
    top: 12%;
    left: 4%;
    animation: cloudDrift 30s linear infinite;
}

.cloud-1::before { width: 80px; height: 80px; top: -30px; left: 30px; }
.cloud-1::after  { width: 60px; height: 60px; top: -20px; left: 100px; }

.cloud-2 {
    width: 240px;
    height: 70px;
    top: 60%;
    right: 5%;
    animation: cloudDrift 45s linear infinite reverse;
}

.cloud-2::before { width: 100px; height: 100px; top: -40px; left: 50px; }
.cloud-2::after  { width: 70px;  height: 70px;  top: -25px; left: 140px; }

.cloud-3 {
    width: 150px;
    height: 50px;
    bottom: 8%;
    left: 40%;
    animation: cloudDrift 40s linear infinite;
}

.cloud-3::before { width: 70px; height: 70px; top: -25px; left: 25px; }
.cloud-3::after  { width: 55px; height: 55px; top: -18px; left: 80px; }

@keyframes cloudDrift {
    0%   { transform: translateX(-30px); }
    50%  { transform: translateX(30px); }
    100% { transform: translateX(-30px); }
}

/* ===== Storybook Sections ===== */

.storybook-page {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 4vw, 3rem);
    overflow: visible;
}

.storybook-page::before {
    content: '';
    position: absolute;
    inset: 6% 4%;
    background: var(--blob-bg, var(--bg-primary));
    border-radius: 48% 52% 60% 40% / 50% 45% 55% 50%;
    box-shadow: var(--pillow-shadow);
    z-index: 0;
    transform: rotate(var(--blob-tilt, -1.5deg));
    transition: transform 800ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

#section-balloon { --blob-bg: var(--bg-primary);   --blob-tilt: -1deg; }
#section-kite    { --blob-bg: var(--bg-secondary); --blob-tilt:  1.5deg; }
#section-window  { --blob-bg: var(--bg-tertiary);  --blob-tilt: -1.5deg; }
#section-clover  { --blob-bg: var(--surface-cool); --blob-tilt:  1deg; }
#section-seeds   { --blob-bg: var(--surface-warm); --blob-tilt: -1deg; }
#section-boats   { --blob-bg: var(--bg-primary);   --blob-tilt:  1.5deg; }

#section-balloon::before { border-radius: 48% 52% 60% 40% / 50% 45% 55% 50%; }
#section-kite::before    { border-radius: 56% 44% 48% 52% / 42% 58% 42% 58%; }
#section-window::before  { border-radius: 38% 62% 52% 48% / 60% 42% 58% 40%; }
#section-clover::before  { border-radius: 60% 40% 56% 44% / 48% 60% 40% 52%; }
#section-seeds::before   { border-radius: 44% 56% 40% 60% / 56% 44% 60% 40%; }
#section-boats::before   { border-radius: 52% 48% 56% 44% / 44% 56% 48% 52%; }

.section-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: clamp(2rem, 5vw, 4rem);
    max-width: 1200px;
    width: 100%;
    padding: clamp(1rem, 3vw, 2rem);
}

.section-inner.reverse {
    flex-direction: row-reverse;
}

.illustration-panel {
    flex: 1 1 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(-100px);
    opacity: 0;
    transition: transform 1100ms cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 800ms ease-out;
}

.section-inner.reverse .illustration-panel {
    transform: translateX(100px);
}

.section-illustration {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 12px 32px rgba(var(--shadow), 0.4));
    animation: gentleFloat 6s ease-in-out infinite;
}

@keyframes gentleFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(-12px) rotate(0.5deg); }
}

.story-text {
    flex: 1 1 45%;
    max-width: 480px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    border-radius: 32px;
    box-shadow: var(--soft-shadow);
    transform: translateY(40px);
    opacity: 0;
    transition: transform 900ms cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 700ms ease-out;
    transition-delay: 200ms;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.4rem);
    margin-bottom: 1.2rem;
    color: var(--text-primary);
}

.story-text p {
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    color: var(--text-secondary);
}

.storybook-page.in-view .illustration-panel,
.storybook-page.in-view.section-blob .illustration-panel {
    transform: translateX(0);
    opacity: 1;
}

.storybook-page.in-view .story-text {
    transform: translateY(0);
    opacity: 1;
}

/* ===== Final Section ===== */

.final-section {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    text-align: center;
    padding: clamp(4rem, 10vw, 8rem) 2rem;
}

.final-content {
    max-width: 720px;
    margin: 0 auto;
    transform: translateY(40px);
    opacity: 0;
    transition: transform 1100ms cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 800ms ease-out;
}

.final-section.in-view .final-content {
    transform: translateY(0);
    opacity: 1;
}

.final-title {
    font-size: clamp(2.4rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
}

.final-text {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.final-annotation {
    font-size: 1.8rem;
    margin: 1.5rem 0;
    display: inline-block;
}

.final-illustration {
    margin-top: 2.5rem;
    display: flex;
    justify-content: center;
    filter: drop-shadow(0 16px 40px rgba(var(--shadow), 0.45));
    animation: gentleFloat 7s ease-in-out infinite;
}

/* ===== Floating Navigation Bubble ===== */

.nav-bubble {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
}

.nav-trigger {
    width: 60px;
    height: 60px;
    background: rgba(255, 245, 233, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--pillow-shadow);
    cursor: pointer;
    border: 2px solid rgba(139, 184, 214, 0.3);
    animation: navBreathe 3s ease-in-out infinite;
    transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-trigger:hover {
    transform: scale(1.1) rotate(8deg);
}

@keyframes navBreathe {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.05); }
}

.nav-items {
    position: absolute;
    bottom: 80px;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    align-items: flex-end;
    pointer-events: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(255, 245, 233, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid rgba(139, 184, 214, 0.3);
    border-radius: 999px;
    padding: 0.5rem 1.1rem 0.5rem 0.8rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    box-shadow: var(--soft-shadow);
    opacity: 0;
    transform: translateY(20px) scale(0.7);
    transition: transform 600ms cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 400ms ease-out,
                background 300ms ease;
    pointer-events: none;
}

.nav-bubble.open .nav-items {
    pointer-events: auto;
}

.nav-bubble.open .nav-item {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.nav-bubble.open .nav-item:nth-child(1) { transition-delay: 50ms; }
.nav-bubble.open .nav-item:nth-child(2) { transition-delay: 100ms; }
.nav-bubble.open .nav-item:nth-child(3) { transition-delay: 150ms; }
.nav-bubble.open .nav-item:nth-child(4) { transition-delay: 200ms; }
.nav-bubble.open .nav-item:nth-child(5) { transition-delay: 250ms; }
.nav-bubble.open .nav-item:nth-child(6) { transition-delay: 300ms; }
.nav-bubble.open .nav-item:nth-child(7) { transition-delay: 350ms; }

.nav-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(0) scale(1.05);
}

.nav-icon {
    font-size: 1.2rem;
    color: var(--accent-warm);
}

.nav-label {
    color: var(--text-primary);
}

/* ===== Dandelion Seeds (click interactions) ===== */

#dandelion-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 50;
    overflow: hidden;
}

.click-seed {
    position: absolute;
    width: 14px;
    height: 14px;
    pointer-events: none;
    will-change: transform, opacity;
}

.click-seed svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

/* ===== Bubble hover wobble ===== */

.bubble:hover,
.floating-element:hover {
    animation-play-state: paused;
    transform: scale(1.08);
}

/* ===== Story bubbles styling extras ===== */

.story-text {
    border: 2px solid rgba(139, 184, 214, 0.18);
}

/* ===== Responsive ===== */

@media (max-width: 900px) {
    .section-inner,
    .section-inner.reverse {
        flex-direction: column;
        gap: 2rem;
    }

    .illustration-panel {
        flex: 0 0 auto;
        transform: translateY(40px);
    }

    .section-inner.reverse .illustration-panel {
        transform: translateY(40px);
    }

    .storybook-page.in-view .illustration-panel {
        transform: translateY(0);
    }

    .section-illustration {
        max-width: 320px;
    }
}

@media (max-width: 768px) {
    body { font-size: 16px; }

    .hero-title { font-size: clamp(2.4rem, 12vw, 4.5rem); }
    .hero-subtitle { font-size: clamp(1.2rem, 5vw, 1.8rem); }

    .section-title {
        font-size: clamp(1.5rem, 4vw, 2.5rem);
    }

    .nav-bubble {
        bottom: 1.2rem;
        right: 50%;
        transform: translateX(50%);
    }

    .nav-bubble .nav-items {
        right: 50%;
        transform: translateX(50%);
        align-items: center;
    }

    .floating-element.bubble-3,
    .floating-element.open-book {
        display: none;
    }

    .storybook-page::before {
        inset: 4% 2%;
        border-radius: 32px;
    }
}

@media (max-width: 480px) {
    .story-text {
        padding: 1.2rem;
        border-radius: 24px;
    }

    .section-illustration {
        max-width: 260px;
    }
}