/* === RESET & BASE === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #0a0a0f;
    --bg-section: #111118;
    --bg-card: #1a1a24;
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --accent: #7c3aed;
    --accent-light: #a78bfa;
    --accent-pink: #ec4899;
    --accent-glow: rgba(124, 58, 237, 0.3);
    --green: #2ecc71;
    --red: #e74c3c;
    --orange: #f39c12;
    --gray: #95a5a6;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'DM Sans', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === ANIMATED BACKGROUND ORBS === */
.bg-orbs {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    mix-blend-mode: screen;
    will-change: transform;
}

.bg-orb-1 {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
    top: -10%;
    left: -8%;
    animation: orb-drift-1 22s ease-in-out infinite alternate;
}

.bg-orb-2 {
    width: 440px;
    height: 440px;
    background: radial-gradient(circle, #ec4899 0%, transparent 70%);
    top: 35%;
    right: -10%;
    animation: orb-drift-2 28s ease-in-out infinite alternate;
}

.bg-orb-3 {
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
    bottom: -8%;
    left: 30%;
    animation: orb-drift-3 32s ease-in-out infinite alternate;
}

@keyframes orb-drift-1 {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(120px, 80px) scale(1.1); }
    100% { transform: translate(60px, 180px) scale(0.95); }
}

@keyframes orb-drift-2 {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(-140px, 120px) scale(1.15); }
    100% { transform: translate(-60px, -60px) scale(0.9); }
}

@keyframes orb-drift-3 {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(180px, -100px) scale(1.1); }
    100% { transform: translate(-80px, -40px) scale(1.05); }
}

/* === SCROLL PROGRESS BAR === */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--accent-pink));
    z-index: 200;
    box-shadow: 0 0 12px rgba(124, 58, 237, 0.6);
    transition: width 0.08s linear;
}

/* === NAVIGATION === */
#nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    background-size: 200% 100%;
    animation: brand-shimmer 6s ease-in-out infinite;
}

@keyframes brand-shimmer {
    0%, 100% { background-position: 0% 50%; }
    50%      { background-position: 100% 50%; }
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.3rem 0;
    transition: color 0.25s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-pink));
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.3s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

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

/* === SECTIONS === */
.section {
    min-height: 100vh;
    padding: 6rem 2rem 4rem;
    position: relative;
    z-index: 1;
}

/* Story sections fade + rise as they enter the viewport */
.section-story,
.section-explore {
    opacity: 0;
    transform: translateY(40px);
    transition:
        opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.section-story.visible,
.section-explore.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === HERO === */
.section-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: radial-gradient(ellipse at 50% 30%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
    padding-top: 4rem;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 1.5rem;
}

.hero-title .title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: hero-line-in 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-title .title-line:nth-child(1) { animation-delay: 0.15s; }
.hero-title .title-line:nth-child(2) { animation-delay: 0.4s; }
.hero-title .title-line:nth-child(3) { animation-delay: 0.65s; }

@keyframes hero-line-in {
    to { opacity: 1; transform: translateY(0); }
}

.highlight {
    background: linear-gradient(135deg, var(--accent), var(--accent-pink), var(--accent));
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: highlight-shimmer 5s linear infinite;
}

@keyframes highlight-shimmer {
    0%   { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.7;
    opacity: 0;
    animation: fade-up 1s cubic-bezier(0.22, 1, 0.36, 1) 0.9s forwards;
}

@keyframes fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Hero stat counters */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin: 0 auto 3rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fade-up 1s cubic-bezier(0.22, 1, 0.36, 1) 1.15s forwards;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.hero-stat-num {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.hero-scroll-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    opacity: 0;
    animation: fade-up 1s cubic-bezier(0.22, 1, 0.36, 1) 1.4s forwards;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--accent-light);
    border-bottom: 2px solid var(--accent-light);
    transform: rotate(45deg);
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.5; }
    50%      { transform: rotate(45deg) translate(4px, 4px); opacity: 1; }
}

#hero-viz {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.4;
}

/* === STORY SECTIONS === */
.section-story {
    display: grid;
    grid-template-columns: 1fr 1.8fr;
    gap: 3rem;
    align-items: start;
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 8rem;
}

.section-text {
    position: sticky;
    top: 8rem;
    padding-right: 1rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    letter-spacing: -1px;
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-pink));
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.3s;
}

.section-story.visible .section-title::after,
.section-explore.visible .section-title::after {
    transform: scaleX(1);
}

.section-intro {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.insight-card {
    background: var(--bg-card);
    border-left: 3px solid var(--accent);
    padding: 1rem 1.25rem;
    border-radius: 0 8px 8px 0;
    font-size: 0.9rem;
    line-height: 1.6;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.insight-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 30%, rgba(124, 58, 237, 0.12) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.8s ease;
}

.insight-card:hover {
    transform: translateX(4px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.15);
}

.insight-card:hover::before {
    transform: translateX(100%);
}

.insight-card strong {
    color: var(--accent-light);
    position: relative;
}

/* === VIZ CONTAINERS === */
.viz-container {
    background: var(--bg-section);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 1.5rem;
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.section-viz .viz-container:hover {
    border-color: rgba(124, 58, 237, 0.35);
    box-shadow: 0 20px 60px rgba(124, 58, 237, 0.12);
}

.section-viz .viz-container::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 12px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.4), transparent 50%, rgba(236, 72, 153, 0.4));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.section-story.visible .viz-container::before {
    opacity: 1;
}

.section-viz {
    width: 100%;
}

/* === EXPLORE SECTION === */
.section-explore {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 8rem;
}

.explore-header {
    text-align: center;
    margin-bottom: 3rem;
}

.explore-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.explore-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
                border-color 0.4s ease,
                box-shadow 0.4s ease;
    position: relative;
    overflow: hidden;
}

.explore-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 40%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.explore-card:hover {
    transform: translateY(-6px);
    border-color: rgba(124, 58, 237, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3),
                0 0 0 1px rgba(124, 58, 237, 0.2);
}

.explore-card:hover::after {
    opacity: 1;
}

.explore-card h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
}

.placeholder-viz {
    background: var(--bg-section);
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.placeholder-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.placeholder-text em {
    color: var(--accent-light);
    font-size: 0.8rem;
}

/* === FOOTER === */
.footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-team {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.3);
}

/* === D3 VIZ STYLES === */
.axis text {
    font-family: var(--font-body);
    font-size: 11px;
    fill: var(--text-secondary);
}

.axis path,
.axis line {
    stroke: rgba(255, 255, 255, 0.15);
}

.tooltip {
    position: absolute;
    background: rgba(26, 26, 36, 0.95);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    pointer-events: none;
    z-index: 200;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    max-width: 250px;
}

.tooltip strong {
    color: var(--accent-light);
}

/* === SANKEY STYLES === */
.sankey-link {
    fill: none;
    stroke-opacity: 0.3;
    transition: stroke-opacity 0.2s ease;
}

.sankey-link:hover {
    stroke-opacity: 0.6;
}

.sankey-node rect {
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.sankey-node text {
    font-family: var(--font-body);
    font-size: 12px;
    fill: var(--text-primary);
    font-weight: 500;
}

/* === BUBBLE STYLES === */
.bubble {
    transition: opacity 0.2s ease;
    cursor: pointer;
}

.bubble:hover {
    opacity: 0.9;
}

.bubble-label {
    font-family: var(--font-body);
    font-size: 10px;
    fill: var(--text-primary);
    text-anchor: middle;
    pointer-events: none;
    font-weight: 500;
}

/* === VIZ CONTROLS (play button + slider) === */
.viz-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
}

.viz-controls .play-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-pink));
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 12px rgba(124, 58, 237, 0.3);
}

.viz-controls .play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.5);
}

.viz-controls .time-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    cursor: pointer;
}

.viz-controls .time-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-pink));
    cursor: pointer;
    box-shadow: 0 0 8px rgba(124, 58, 237, 0.5);
    transition: transform 0.15s ease;
}

.viz-controls .time-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.viz-controls .time-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-pink));
    border: none;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(124, 58, 237, 0.5);
}

.viz-controls .current-month {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-light);
    min-width: 80px;
    text-align: right;
    white-space: nowrap;
}

/* === RACE CHART STYLES === */
.race-bar-rect {
    transition: fill 0.2s ease;
}

.race-bar:hover .race-bar-rect {
    filter: brightness(1.25);
}

.race-bar {
    cursor: pointer;
}

/* === VIBE WHEEL === */
.section-vibes {
    overflow: visible;
}

.vibe-viz-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 780px;
    position: relative;
}

.vibe-viz-container svg {
    overflow: visible;
    filter: drop-shadow(0 0 40px rgba(124, 58, 237, 0.08));
}

.vibe-detail-panel {
    margin-top: 1.5rem;
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    transition: opacity 0.3s ease;
    min-height: 120px;
}

.vibe-detail-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.vibe-detail-stat {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
}

.vibe-detail-bar {
    display: flex;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.4rem;
    background: rgba(255, 255, 255, 0.05);
}

.vibe-sent-pos { background: #2ecc71; }
.vibe-sent-neu { background: #f1c40f; }
.vibe-sent-neg { background: #e74c3c; }

.vibe-detail-legend {
    display: flex;
    gap: 0.8rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.vibe-detail-terms {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-light);
    letter-spacing: 0.3px;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
    .section-story {
        grid-template-columns: 1fr;
    }

    .section-text {
        position: relative;
        top: auto;
    }

    .explore-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }
}