/* =============================================
   prototype.bar — Scandinavian Retro-Futuristic Scroll
   Colors: #F8F4EC, #181820, #60A098, #8060A8, #E8E0D0, #F0E8D8, #C8C0B0, #404048
   Fonts: Syne (display), Inter (body), Fira Code (labels), Lora (quotes)
   ============================================= */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    color: #404048;
    background-color: #F8F4EC;
    line-height: 1.9;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =============================================
   Aurora Background — Nordic Atmospheric Shimmer
   ============================================= */

.aurora-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.aurora-band {
    position: absolute;
    width: 200%;
    height: 40vh;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0;
    will-change: transform, opacity;
}

.aurora-band-1 {
    top: -15vh;
    left: -50%;
    background: linear-gradient(120deg, rgba(96, 160, 152, 0.08), rgba(128, 96, 168, 0.06), transparent);
    animation: auroraShift1 12s ease-in-out infinite alternate;
    animation-delay: 0.5s;
}

.aurora-band-2 {
    top: 20vh;
    left: -30%;
    background: linear-gradient(160deg, rgba(128, 96, 168, 0.06), rgba(96, 160, 152, 0.04), transparent);
    animation: auroraShift2 16s ease-in-out infinite alternate;
    animation-delay: 1s;
}

.aurora-band-3 {
    top: 55vh;
    left: -40%;
    background: linear-gradient(100deg, rgba(96, 160, 152, 0.05), rgba(128, 96, 168, 0.08), transparent);
    animation: auroraShift3 20s ease-in-out infinite alternate;
    animation-delay: 1.5s;
}

@keyframes auroraShift1 {
    0%   { transform: translateX(0) translateY(0) rotate(0deg); opacity: 0.7; }
    50%  { transform: translateX(10%) translateY(5vh) rotate(2deg); opacity: 1; }
    100% { transform: translateX(-5%) translateY(-3vh) rotate(-1deg); opacity: 0.8; }
}

@keyframes auroraShift2 {
    0%   { transform: translateX(0) translateY(0) rotate(0deg); opacity: 0.5; }
    50%  { transform: translateX(-8%) translateY(-4vh) rotate(-2deg); opacity: 0.9; }
    100% { transform: translateX(6%) translateY(3vh) rotate(1deg); opacity: 0.6; }
}

@keyframes auroraShift3 {
    0%   { transform: translateX(0) translateY(0) rotate(0deg); opacity: 0.6; }
    50%  { transform: translateX(12%) translateY(6vh) rotate(3deg); opacity: 0.8; }
    100% { transform: translateX(-8%) translateY(-4vh) rotate(-2deg); opacity: 0.7; }
}

/* =============================================
   Hero Section — Opening Sequence (first 100vh)
   ============================================= */

.hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.hero-inner {
    text-align: center;
    max-width: 700px;
    width: 100%;
}

.hero-title {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    color: #181820;
    letter-spacing: 0.08em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-title.revealed {
    opacity: 1;
    transform: translateY(0);
}

.hero-title-line {
    display: inline-block;
    transition: letter-spacing 0.4s ease;
}

.hero-title-dot {
    display: inline-block;
    color: #60A098;
    margin: 0 0.05em;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.4s ease;
}

.hero-title:hover .hero-title-dot {
    transform: scale(1.4);
    color: #8060A8;
}

.hero-title:hover .hero-title-line {
    letter-spacing: 0.12em;
}

.hero-subtitle {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    color: #404048;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
}

.hero-subtitle.revealed {
    opacity: 1;
    transform: translateY(0);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    animation: fadeInScroll 1s ease 1.5s forwards;
    transition: opacity 0.5s ease;
}

@keyframes fadeInScroll {
    to { opacity: 0.6; }
}

.scroll-line {
    display: block;
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, #60A098, transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { transform: scaleY(1); opacity: 0.6; }
    50% { transform: scaleY(1.3); opacity: 1; }
}

.scroll-text {
    font-family: 'Fira Code', monospace;
    font-size: 0.65rem;
    font-weight: 500;
    color: #60A098;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

/* =============================================
   Skeleton Loading States — Blueprint Previews
   ============================================= */

.skeleton-block {
    background: linear-gradient(90deg, #E8E0D0 25%, #F0E8D8 50%, #E8E0D0 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.8s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes skeletonShimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-title {
    width: 60%;
    height: 3.5rem;
    margin: 0 auto 1rem;
}

.skeleton-subtitle {
    width: 45%;
    height: 1rem;
    margin: 0 auto;
}

.skeleton-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.skeleton-group.hidden {
    opacity: 0;
    transform: translateY(-10px);
    position: absolute;
    pointer-events: none;
}

.skeleton-header {
    width: 55%;
    height: 2rem;
}

.skeleton-line {
    width: 100%;
    height: 0.85rem;
}

.skeleton-line-short {
    width: 70%;
}

.skeleton-image {
    width: 100%;
    height: 300px;
}

.hero .skeleton-block {
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.hero .skeleton-block.hidden {
    opacity: 0;
    transform: translateY(-10px);
    position: absolute;
    pointer-events: none;
}

/* =============================================
   Prototype Sections — Continuous Scroll Journal
   ============================================= */

.prototype-section {
    position: relative;
    z-index: 1;
    padding: clamp(80px, 12vh, 160px) 2rem;
}

.section-inner {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.section-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    border-left: 3px solid #60A098;
    padding-left: 2rem;
}

.section-content.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* =============================================
   Step Labels — Fira Code Monospace
   ============================================= */

.step-label {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    font-size: 0.8rem;
    color: #60A098;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border: 1.5px solid #60A098;
    border-radius: 50%;
    font-size: 0.7rem;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.section-content:hover .step-number {
    background-color: #60A098;
    color: #F8F4EC;
}

/* =============================================
   Section Headings — Syne Kinetic Display
   ============================================= */

.section-heading {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: #181820;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    transition: letter-spacing 0.4s ease, font-weight 0.4s ease;
}

.section-heading:hover {
    letter-spacing: 0.02em;
}

/* =============================================
   Body Text — Inter Clean Modern
   ============================================= */

.section-body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    color: #404048;
    line-height: 1.9;
    margin-bottom: 1.25rem;
}

.section-body:last-child {
    margin-bottom: 0;
}

/* =============================================
   Blockquote — Lora Italic
   ============================================= */

.section-quote {
    font-family: 'Lora', serif;
    font-style: italic;
    font-size: clamp(1.1rem, 1.5vw, 1.3rem);
    color: #8060A8;
    line-height: 1.7;
    margin: 2rem 0;
    padding: 1.5rem 0;
    border-top: 1px solid #C8C0B0;
    border-bottom: 1px solid #C8C0B0;
    position: relative;
}

.quote-mark {
    font-family: 'Syne', sans-serif;
    font-style: normal;
    font-weight: 700;
    font-size: 1.8rem;
    color: #60A098;
    opacity: 0.5;
    vertical-align: -0.1em;
    margin: 0 0.1em;
}

/* =============================================
   Process Steps
   ============================================= */

.process-steps {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.process-step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: rgba(232, 224, 208, 0.5);
    border-radius: 6px;
    transition: background 0.3s ease, transform 0.3s ease, border-left-color 0.3s ease;
    border-left: 2px solid transparent;
}

.process-step:hover {
    background: rgba(232, 224, 208, 0.8);
    transform: translateX(4px);
    border-left-color: #60A098;
}

.process-step-num {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    font-size: 0.85rem;
    color: #60A098;
    flex-shrink: 0;
    width: 1.5rem;
}

.process-step-text {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: 0.95rem;
    color: #404048;
    line-height: 1.7;
}

/* =============================================
   Component Grid — Color Token Cards
   ============================================= */

.component-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin: 2rem 0;
}

.component-card {
    background: #F8F4EC;
    border: 1px solid #C8C0B0;
    border-radius: 8px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.component-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(24, 24, 32, 0.06);
}

.component-swatch {
    width: 100%;
    height: 48px;
    border-radius: 4px;
    transition: transform 0.3s ease;
}

.component-card:hover .component-swatch {
    transform: scaleY(1.15);
}

.component-label {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 0.85rem;
    color: #181820;
}

.component-code {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    font-size: 0.75rem;
    color: #60A098;
}

/* =============================================
   Documentation Entries — Timeline
   ============================================= */

.doc-entry {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-top: 1.25rem;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(200, 192, 176, 0.4);
    transition: transform 0.3s ease;
}

.doc-entry:hover {
    transform: translateX(4px);
}

.doc-entry:last-child {
    border-bottom: none;
}

.doc-entry-marker {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #60A098;
    flex-shrink: 0;
    margin-top: 0.5rem;
    position: relative;
    transition: background-color 0.3s ease;
}

.doc-entry:hover .doc-entry-marker {
    background: #8060A8;
}

.doc-entry-marker::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid rgba(96, 160, 152, 0.3);
    transition: border-color 0.3s ease, width 0.3s ease, height 0.3s ease;
}

.doc-entry:hover .doc-entry-marker::after {
    border-color: rgba(128, 96, 168, 0.3);
    width: 20px;
    height: 20px;
}

.doc-entry-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.doc-entry-date {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    font-size: 0.75rem;
    color: #8060A8;
    letter-spacing: 0.05em;
}

.doc-entry-text {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: 0.9rem;
    color: #404048;
    line-height: 1.7;
}

/* =============================================
   Duotone Sections — Two-Tone Documentation
   ============================================= */

.duotone-section {
    position: relative;
    z-index: 1;
    padding: clamp(40px, 6vh, 80px) 2rem;
}

.duotone-frame {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.duotone-image {
    opacity: 0;
    transform: scale(0.97);
    transition: opacity 0.8s ease, transform 0.8s ease;
    border-radius: 6px;
    overflow: hidden;
}

.duotone-image.revealed {
    opacity: 1;
    transform: scale(1);
}

.duotone-svg {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
}

.duotone-frame .skeleton-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    transition: opacity 0.6s ease;
}

.duotone-frame .skeleton-image.hidden {
    opacity: 0;
    pointer-events: none;
}

.duotone-caption {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    font-size: 0.7rem;
    color: #C8C0B0;
    letter-spacing: 0.08em;
    margin-top: 1rem;
    text-transform: uppercase;
}

/* =============================================
   Footer
   ============================================= */

.site-footer {
    position: relative;
    z-index: 1;
    padding: clamp(80px, 12vh, 160px) 2rem 3rem;
}

.footer-inner {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.footer-mark {
    font-family: 'Syne', sans-serif;
    font-weight: 500;
    font-size: 1.2rem;
    color: #181820;
    letter-spacing: 0.1em;
    transition: letter-spacing 0.3s ease;
}

.footer-mark:hover {
    letter-spacing: 0.2em;
}

.footer-line {
    width: 40px;
    height: 1px;
    background: #60A098;
    margin: 1.5rem auto;
    transition: width 0.4s ease;
}

.site-footer:hover .footer-line {
    width: 80px;
}

.footer-text {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: 0.85rem;
    color: #C8C0B0;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.footer-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.footer-meta-item {
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    font-size: 0.7rem;
    color: #C8C0B0;
    letter-spacing: 0.1em;
}

.footer-meta-divider {
    color: #C8C0B0;
    font-size: 0.7rem;
}

/* =============================================
   Kinetic Typography — Optical Weight Shift
   ============================================= */

[data-kinetic="true"] {
    transition: letter-spacing 0.4s ease, text-shadow 0.4s ease, font-weight 0.4s ease;
}

[data-kinetic="true"]:hover {
    text-shadow: 0 0 30px rgba(128, 96, 168, 0.15);
}

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

@media (max-width: 768px) {
    .component-grid {
        grid-template-columns: 1fr;
    }

    .section-content {
        padding-left: 1.25rem;
    }

    .hero-scroll-indicator {
        bottom: 2rem;
    }

    .process-step {
        padding: 0.85rem 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-heading {
        font-size: 1.6rem;
    }

    .skeleton-title {
        width: 80%;
        height: 2.5rem;
    }
}