/* =========================================================
   Sparkle Durio | Brand Palette
   Obsidian slate base, emerald mint for actions,
   warm amber reserved for AI-related highlights.
   Headings: Nunito | Body: Lato
   ========================================================= */
:root {
    --bg-primary: #0E1218;      /* obsidian slate */
    --bg-secondary: #151B23;    /* raised slate */
    --bg-card: #1A212B;         /* card surface */
    --text-primary: #EEF2F6;
    --text-secondary: #A3AFBD;
    --accent: #34D399;          /* emerald mint */
    --accent-hover: #6EE7B7;
    --accent-soft: rgba(52, 211, 153, 0.12);
    --ai: #F5B041;              /* warm amber, AI steps */
    --ai-soft: rgba(245, 176, 65, 0.12);
    --border: rgba(238, 242, 246, 0.09);
    --border-strong: rgba(238, 242, 246, 0.16);
    --font-main: 'Lato', system-ui, sans-serif;
    --font-heading: 'Nunito', system-ui, sans-serif;
    --radius: 14px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(900px 500px at 85% -10%, rgba(52, 211, 153, 0.08), transparent 60%),
        radial-gradient(700px 400px at -10% 20%, rgba(245, 176, 65, 0.05), transparent 60%);
    background-repeat: no-repeat;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1.02rem;
    line-height: 1.65;
    overflow-x: hidden;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 1.5rem; }

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
p a, li a { color: var(--accent); }
p a:hover, li a:hover { color: var(--accent-hover); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- Navbar ---------- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(14, 18, 24, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    padding: 0.9rem 0;
}

.nav-container { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }

.logo { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 900; letter-spacing: 0.02em; }
.logo span { color: var(--accent); }

.nav-links { display: flex; list-style: none; gap: 1.6rem; }
.nav-links a { font-size: 0.9rem; font-weight: 700; color: var(--text-secondary); }
.nav-links a:hover { color: var(--accent); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border-radius: 999px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.92rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary { background: var(--accent); color: #062418; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(52, 211, 153, 0.22); }

.btn-secondary { border: 1px solid var(--border-strong); color: var(--text-primary); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero { padding: 9.5rem 0 5rem; text-align: center; }

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

.hero-name { font-size: clamp(2.6rem, 6vw, 4.2rem); font-weight: 900; margin-bottom: 0.6rem; }

.hero-title {
    font-size: clamp(1.05rem, 2.2vw, 1.35rem);
    font-family: var(--font-heading);
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero-tagline { max-width: 680px; margin: 0 auto 2.75rem; font-size: 1.1rem; color: var(--text-secondary); }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin: 0 auto 2.75rem;
    max-width: 860px;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.6rem 1.25rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.stat-number { display: block; font-family: var(--font-heading); font-size: 2.3rem; font-weight: 900; color: var(--accent); margin-bottom: 0.25rem; }
.stat-label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-secondary); }

.hero-ctas { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.9rem; }

/* ---------- Sections ---------- */
.section { padding: 6.5rem 0; }
.bg-alt { background-color: var(--bg-secondary); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-header { margin-bottom: 3rem; }

.section-subtitle {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.78rem;
    font-weight: 700;
    display: block;
    margin-bottom: 0.5rem;
}

.section-title { font-size: clamp(1.9rem, 4vw, 2.5rem); }
.section-intro { color: var(--text-secondary); max-width: 680px; margin-top: 0.75rem; }

/* ---------- About ---------- */
.about-content { max-width: 800px; }
.about-content p { color: var(--text-secondary); }
.lead-text { font-size: 1.35rem; line-height: 1.45; margin-bottom: 1.25rem; color: var(--text-primary) !important; font-family: var(--font-heading); font-weight: 700; }

/* ---------- Impact ---------- */
.impact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }

.impact-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.impact-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.impact-card i { font-size: 1.5rem; color: var(--accent); margin-bottom: 1rem; display: inline-block; }
.impact-card h3 { font-size: 1.45rem; margin-bottom: 0.35rem; }
.impact-card p { color: var(--text-secondary); }

/* ---------- Capabilities ---------- */
.capabilities-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2rem; }

.cap-group h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 1.1rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}
.cap-group ul { list-style: none; }
.cap-group li { margin-bottom: 0.7rem; color: var(--text-secondary); position: relative; padding-left: 1.4rem; }
.cap-group li::before { content: '→'; position: absolute; left: 0; color: var(--accent); }

.tool-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tool-tags span {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}
.tool-tags span.ai { border-color: rgba(245, 176, 65, 0.4); color: var(--ai); background: var(--ai-soft); }

/* ---------- Experience ---------- */
.timeline { display: flex; flex-direction: column; gap: 3rem; }

.job-entry { border-left: 2px solid var(--border-strong); padding-left: 2rem; position: relative; }
.job-entry::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 0.45rem;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.job-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 0.75rem; }
.job-title-box h3 { font-size: 1.25rem; margin-bottom: 0.15rem; }
.company { color: var(--accent); font-weight: 700; }
.date { font-size: 0.88rem; color: var(--text-secondary); white-space: nowrap; }
.job-summary { color: var(--text-secondary); margin-bottom: 1rem; }

.job-bullets { list-style: none; }
.job-bullets li { margin-bottom: 0.65rem; position: relative; padding-left: 1.4rem; }
.job-bullets li::before { content: '•'; position: absolute; left: 0.2rem; color: var(--accent); }

.earlier-exp { background: var(--bg-card); padding: 2rem; border-radius: var(--radius); border: 1px solid var(--border); }
.earlier-exp h3 { font-size: 1.05rem; margin-bottom: 0.25rem; color: var(--accent); }
.earlier-exp > p { color: var(--text-secondary); margin-bottom: 1rem; }

/* ---------- Case Studies ---------- */
.track { margin-bottom: 4rem; }
.track:last-child { margin-bottom: 0; }

.track-header { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-bottom: 1.5rem; padding-bottom: 0.9rem; border-bottom: 1px solid var(--border); }
.track-header h3 { font-size: 1.35rem; display: flex; align-items: center; gap: 0.6rem; }
.track-header h3 i { color: var(--accent); font-size: 1.1rem; }
.track-header p { color: var(--text-secondary); font-size: 0.95rem; }
.track.ai-track .track-header h3 i { color: var(--ai); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }

.project-card {
    background: var(--bg-card);
    padding: 1.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}
.project-card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.project-card.featured { grid-column: 1 / -1; display: grid; grid-template-columns: 1.05fr 1fr; gap: 2rem; align-items: center; }
.featured-text { display: flex; flex-direction: column; height: 100%; }
.featured-media .video-label { margin-top: 0 !important; }
@media (max-width: 860px) { .project-card.featured { grid-template-columns: 1fr; } }

.project-card h3 { font-size: 1.15rem; margin-bottom: 0.75rem; }
.project-card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 1.25rem; }
.project-card p strong { color: var(--text-primary); }

.card-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.card-tags span { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; padding: 0.2rem 0.6rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.card-tags span.ai { background: var(--ai-soft); color: var(--ai); }
.card-tags span.mock { background: rgba(238, 242, 246, 0.06); color: var(--text-secondary); }

.card-footer { margin-top: auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem; }

.result-tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
}
.result-tag.ai { background: var(--ai-soft); color: var(--ai); }

.read-more { font-family: var(--font-heading); font-weight: 800; font-size: 0.9rem; color: var(--accent); }
.read-more:hover { color: var(--accent-hover); }

.video-label { font-size: 0.85rem; color: var(--text-secondary); margin: 1.25rem 0 0.5rem !important; }
.video-wrap { position: relative; padding-bottom: 56.25%; height: 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- Case study page helpers ---------- */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 0.75rem; }
.flow-step { flex: 1 1 180px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.flow-step .num { font-family: var(--font-heading); font-weight: 900; font-size: 0.8rem; color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase; }
.flow-step h4 { font-size: 1.05rem; margin: 0.3rem 0; }
.flow-step p { font-size: 0.9rem; color: var(--text-secondary); }
.flow-step.ai { border-color: rgba(245, 176, 65, 0.45); background: linear-gradient(180deg, var(--ai-soft), transparent); }
.flow-step.ai .num { color: var(--ai); }

.callout { background: var(--bg-card); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 10px; padding: 1.25rem 1.5rem; color: var(--text-secondary); max-width: 820px; }
.callout.ai { border-left-color: var(--ai); }
.callout strong { color: var(--text-primary); }

.prompt-box { background: #0A0D12; border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem 1.5rem; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; color: #CFE9DD; white-space: pre-wrap; max-width: 820px; overflow-x: auto; }

.compare { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.compare .col { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.compare .col h4 { font-size: 1rem; margin-bottom: 0.75rem; }
.compare .col.before h4 { color: var(--text-secondary); }
.compare .col.after h4 { color: var(--accent); }

.disclaimer { font-size: 0.85rem; color: var(--text-secondary); font-style: italic; margin-top: 1rem; }

/* ---------- Contact ---------- */
.contact-box { text-align: center; max-width: 700px; margin: 0 auto; }
.contact-box > p { color: var(--text-secondary); margin-top: 1rem; }
.contact-details { display: flex; flex-direction: column; gap: 0.75rem; margin: 2rem 0; }
.contact-item { display: flex; align-items: center; justify-content: center; gap: 0.75rem; color: var(--text-secondary); }
.contact-item i { color: var(--accent); }
.contact-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.9rem; }

/* ---------- Footer ---------- */
.footer { padding: 3rem 0; text-align: center; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 0.85rem; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease-out, transform 0.7s ease-out; }
.reveal.active { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
    .nav-container { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .nav-links {
        gap: 1.1rem;
        overflow-x: auto;
        max-width: 100%;
        padding-bottom: 0.25rem;
        scrollbar-width: none;
    }
    .nav-links::-webkit-scrollbar { display: none; }
    .nav-links a { white-space: nowrap; font-size: 0.85rem; }
    .hero { padding-top: 10rem; }
}

@media (max-width: 640px) {
    .container { padding: 0 1rem; }
    .section { padding: 4.5rem 0; }
    .hero-stats { grid-template-columns: 1fr; }
    .job-header { flex-direction: column; gap: 0.25rem; }
    .job-entry { padding-left: 1.25rem; }
    .contact-actions, .hero-ctas { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
}

/* ---------- Prompt evolution (case studies) ---------- */
.evolution { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: stretch; }
.stage { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.stage.after { border-color: rgba(52, 211, 153, 0.35); }
.stage h4 { font-size: 1rem; margin: 0.75rem 0 0.6rem; }
.stage h4.sub { margin-top: 1.25rem; color: var(--text-secondary); }
.stage .job-bullets li { font-size: 0.93rem; color: var(--text-secondary); }
.stage .job-bullets.miss li::before { content: '\00d7'; color: #F87171; }
.stage-arrow { align-self: center; font-size: 1.6rem; color: var(--accent); font-weight: 900; }
.stage-label { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.25rem 0.7rem; border-radius: 999px; background: rgba(238, 242, 246, 0.07); color: var(--text-secondary); }
.stage.after .stage-label { background: var(--accent-soft); color: var(--accent); }
.stage-label.result { background: var(--ai-soft); color: var(--ai); }

.result-block { margin-top: 1.25rem; background: var(--bg-card); border: 1px solid rgba(245, 176, 65, 0.35); border-radius: var(--radius); padding: 1.5rem; }
.result-head { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; }
.result-head p { color: var(--text-secondary); font-size: 0.95rem; flex: 1 1 320px; }

details.reveal-box { margin-top: 1rem; border: 1px solid var(--border); border-radius: 10px; background: rgba(0, 0, 0, 0.15); }
details.reveal-box > summary { cursor: pointer; list-style: none; padding: 0.75rem 1rem; font-family: var(--font-heading); font-weight: 800; font-size: 0.92rem; color: var(--accent); display: flex; align-items: center; gap: 0.5rem; }
details.reveal-box > summary::-webkit-details-marker { display: none; }
details.reveal-box > summary i { font-size: 0.75rem; transition: transform 0.2s ease; }
details.reveal-box[open] > summary i { transform: rotate(90deg); }
details.reveal-box > summary:hover { color: var(--accent-hover); }
details.reveal-box.output > summary { color: var(--ai); }
.details-body { padding: 0 1rem 1rem; }
.details-body .prompt-box { max-width: none; max-height: 480px; overflow: auto; }
.inputs { max-width: 820px; }

.output-doc { background: #F7F8FA; color: #1F2933; border-radius: 10px; padding: 1.5rem 1.75rem; font-size: 0.93rem; line-height: 1.6; }
.output-doc h5 { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 800; color: #0E1218; margin: 0.25rem 0 0.75rem; }
.output-doc p { margin: 0.9rem 0 0.4rem; color: #1F2933; }
.output-doc ul, .output-doc ol { padding-left: 1.3rem; margin-bottom: 0.5rem; }
.output-doc li { margin-bottom: 0.3rem; }
.output-doc li::before { content: none; }
.output-doc strong { color: #0E1218; }
.output-doc hr { border: 0; border-top: 1px solid #D9DEE5; margin: 1.25rem 0; }
.output-doc table { width: 100%; border-collapse: collapse; margin: 0.5rem 0 0.75rem; font-size: 0.88rem; }
.output-doc th, .output-doc td { border: 1px solid #D9DEE5; padding: 0.45rem 0.6rem; text-align: left; vertical-align: top; }
.output-doc th { background: #E8F7F0; color: #0E1218; }

@media (max-width: 860px) {
    .evolution { grid-template-columns: 1fr; }
    .stage-arrow { transform: rotate(90deg); justify-self: center; }
    .output-doc { padding: 1.1rem; overflow-x: auto; }
}