/* ============================================
   NIMA PARVIN — EDITORIAL DARK THEME
   Palette: Deep Burgundy + Warm Ivory + Charcoal
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;0,700;1,300;1,400&family=DM+Sans:wght@300;400;500;600&display=swap');

:root {
    --bg:          #0d0b09;
    --bg-2:        #120f0c;
    --bg-3:        #171310;

    /* Burgundy accent system */
    --red:         #8b2635;
    --red-mid:     #a83248;
    --red-light:   #c4455f;
    --red-glow:    rgba(139, 38, 53, 0.18);

    /* Warm ivory text */
    --text:        #f0e8dc;
    --text-mid:    #b8a898;
    --text-dim:    #7a6e65;

    --border:      rgba(240, 232, 220, 0.07);
    --border-red:  rgba(139, 38, 53, 0.35);

    --serif:       'Cormorant Garamond', Georgia, serif;
    --sans:        'DM Sans', system-ui, sans-serif;
    --ease:        cubic-bezier(0.22, 1, 0.36, 1);
}

/* Persona schema */
body.persona-marketer { --accent: var(--red); --glow: var(--red-glow); }
body.persona-scholar  { --accent: #b07d3a; --glow: rgba(176,125,58,0.15); }

/* ---- RESET ---- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; cursor:none; }
html { font-size:16px; }
html.lenis { height:auto; }
.lenis.lenis-smooth { scroll-behavior:auto; }
body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration:none; color:inherit; }
ul { list-style:none; }

/* Scrollbar */
::-webkit-scrollbar { width:5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--red); border-radius:4px; }

/* ---- CURSOR ---- */
.cursor {
    width:6px; height:6px;
    background: var(--accent);
    border-radius:50%;
    position:fixed; top:0; left:0;
    pointer-events:none; z-index:9999;
    transform:translate(-50%,-50%);
    transition: width .25s, height .25s, background .5s;
}
.cursor-follower {
    width:32px; height:32px;
    border:1px solid rgba(139,38,53,0.5);
    border-radius:50%;
    position:fixed; top:0; left:0;
    pointer-events:none; z-index:9998;
    transform:translate(-50%,-50%);
    transition: width .25s, height .25s, border .5s;
}
.cursor.hover { width:50px; height:50px; background:rgba(139,38,53,0.12); }
.cursor-follower.hover { opacity:0; }

/* ---- UTILS ---- */
.container { width:90%; max-width:1280px; margin:0 auto; }
.s-dark  { background:var(--bg); }
.s-mid   { background:var(--bg-2); }
.s-alt   { background:var(--bg-3); }
.mt-2 { margin-top:1rem; }
.mt-4 { margin-top:2.5rem; }
.fade-up { opacity:0; transform:translateY(28px); }

/* ---- TYPE SCALE ---- */
.label {
    font-family: var(--sans);
    font-size:.72rem; font-weight:600;
    letter-spacing:.18em; text-transform:uppercase;
    color: var(--accent);
}
.display {
    font-family: var(--serif);
    font-size: clamp(3.5rem, 7vw, 7rem);
    font-weight:300; line-height:1.0;
    letter-spacing:-.02em;
}
.display em { font-style:italic; color: var(--accent); }
.heading {
    font-family: var(--serif);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight:300; line-height:1.1;
}
.heading span { color: var(--accent); font-style:italic; }
.body-text { font-size:1rem; color:var(--text-mid); line-height:1.75; }

/* ---- NAVBAR ---- */
.navbar {
    position:fixed; top:0; left:0; width:100%;
    padding:2rem 0; z-index:200;
    transition: padding .4s var(--ease), background .4s var(--ease);
}
.navbar.scrolled {
    padding:1rem 0;
    background:rgba(13,11,9,.92);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--border);
}
.nav-container {
    display:flex; align-items:center;
    justify-content:space-between; gap:2rem;
}
.nav-logo a {
    font-family: var(--serif);
    font-size:1.6rem; font-weight:600;
    letter-spacing:-.01em;
}
.nav-logo span { color:var(--accent); }
.nav-links { display:flex; gap:2.5rem; }
.nav-links a {
    font-size:.78rem; font-weight:500;
    letter-spacing:.1em; text-transform:uppercase;
    color:var(--text-dim);
    transition: color .3s;
}
.nav-links a:hover { color:var(--text); }

/* Persona Toggle */
.persona-switcher-wrapper {
    display:flex; align-items:center; gap:.7rem;
    padding:.35rem .75rem;
    border:1px solid var(--border); border-radius:50px;
    background:rgba(255,255,255,.02);
}
.switcher-label {
    font-size:.68rem; font-weight:600;
    letter-spacing:.12em; text-transform:uppercase;
    color:var(--text-dim); transition:color .4s;
}
.switcher-label.active { color:var(--text); }
.persona-toggle-btn {
    width:40px; height:20px;
    background:rgba(255,255,255,.06);
    border-radius:20px; border:none;
    position:relative; cursor:pointer;
}
.toggle-slider {
    width:14px; height:14px;
    background:var(--accent);
    border-radius:50%;
    position:absolute; top:3px; left:3px;
    transition:transform .4s var(--ease), background .5s;
    box-shadow:0 0 8px var(--glow);
}
body.persona-scholar .toggle-slider { transform:translateX(20px); }

.mobile-menu-btn { display:none; background:none; border:none; flex-direction:column; gap:5px; }
.bar { width:22px; height:1.5px; background:var(--text); transition:.3s; }

/* ---- HERO ---- */
.hero {
    min-height:100vh;
    display:grid;
    grid-template-columns: 1fr 1fr;
    position:relative;
    overflow:hidden;
}

/* Left panel */
.hero-left {
    background:var(--bg-2);
    display:flex; flex-direction:column;
    justify-content:flex-end;
    padding:12rem 5% 6rem 5%;
    position:relative; z-index:1;
    border-right:1px solid var(--border);
}
.hero-overline { margin-bottom:2rem; }
.hero-title { margin-bottom:2.5rem; }
.hero-tagline {
    font-size:1.05rem; color:var(--text-mid);
    max-width:480px; line-height:1.75;
    margin-bottom:3rem;
}
.hero-tagline.scholar-copy { display:none; }
.hero-ctas { display:flex; gap:1.2rem; flex-wrap:wrap; }

/* Right panel - Image */
.hero-right {
    position:relative;
    overflow:hidden;
}
.hero-right img {
    width:100%; height:100%;
    object-fit:cover;
    object-position:center top;
    filter:grayscale(25%) contrast(1.05) brightness(.9);
    display:block;
}
.hero-right-overlay {
    position:absolute; inset:0;
    background:linear-gradient(to right, var(--bg-2) 0%, transparent 30%),
               linear-gradient(to top, var(--bg-2) 0%, transparent 40%);
}
/* Vertical index number */
.hero-index {
    position:absolute; bottom:2.5rem; right:2.5rem;
    font-family:var(--serif); font-size:8rem; font-weight:700;
    color:rgba(240,232,220,.04); line-height:1; user-select:none;
    z-index:2;
}
/* Scrolling label */
.scroll-hint {
    position:absolute; bottom:3rem; left:50%;
    transform:translateX(-50%);
    display:flex; flex-direction:column; align-items:center; gap:.5rem;
    opacity:.3; z-index:10;
}
.scroll-hint span { font-size:.65rem; letter-spacing:.2em; text-transform:uppercase; }
.scroll-line {
    width:1px; height:40px;
    background:linear-gradient(to bottom, var(--text), transparent);
    animation: scrollDrop 2s ease-in-out infinite;
}
@keyframes scrollDrop {
    0%   { transform:scaleY(0); transform-origin:top; }
    50%  { transform:scaleY(1); transform-origin:top; }
    50.01%{ transform:scaleY(1); transform-origin:bottom; }
    100% { transform:scaleY(0); transform-origin:bottom; }
}

/* ---- BUTTONS ---- */
.btn {
    display:inline-flex; align-items:center; gap:.5rem;
    padding:.85rem 2rem;
    font-family:var(--sans); font-size:.78rem;
    font-weight:600; letter-spacing:.1em; text-transform:uppercase;
    border-radius:3px; border:1px solid transparent;
    transition: all .35s var(--ease);
}
.btn-filled {
    background:var(--accent); color:var(--bg);
    border-color:var(--accent);
}
.btn-filled:hover { background:var(--red-mid); border-color:var(--red-mid); transform:translateY(-2px); }
.btn-ghost {
    background:transparent; color:var(--text);
    border-color:var(--border);
}
.btn-ghost:hover { border-color:var(--accent); color:var(--accent); transform:translateY(-2px); }

/* ---- SECTION WRAPPER ---- */
.section { padding:9rem 0; position:relative; }

/* Decorative horizontal rule */
.section-rule {
    display:block; width:50px; height:1px;
    background:var(--accent); margin-bottom:1.5rem;
}

/* Section header layout */
.section-header {
    display:flex; justify-content:space-between; align-items:flex-end;
    margin-bottom:5rem; gap:2rem; flex-wrap:wrap;
}
.section-number {
    font-family:var(--serif); font-size:6rem; font-weight:700;
    color:rgba(240,232,220,.04); line-height:1; user-select:none;
    flex-shrink:0;
}

/* ---- EXPERTISE ---- */
.expertise-grid {
    display:grid;
    grid-template-columns: repeat(2, 1fr);
    gap:1px;
    border:1px solid var(--border);
}
.expertise-card {
    padding:3.5rem;
    background:var(--bg-2);
    position:relative; overflow:hidden;
    transition: background .4s;
}
.expertise-card::before {
    content:'';
    position:absolute; top:0; left:0;
    width:3px; height:0;
    background:var(--accent);
    transition: height .5s var(--ease);
}
.expertise-card:hover::before { height:100%; }
.expertise-card:hover { background:var(--bg-3); }
.expertise-card[data-persona-type="scholar"] { opacity:.22; filter:grayscale(1); pointer-events:none; transition:.5s; }
body.persona-scholar .expertise-card[data-persona-type="marketer"] { opacity:.22; filter:grayscale(1); pointer-events:none; }
body.persona-scholar .expertise-card[data-persona-type="scholar"] { opacity:1; filter:none; pointer-events:auto; }

.exp-card-num {
    font-family:var(--serif); font-size:4rem; font-weight:700;
    color:rgba(240,232,220,.05); position:absolute;
    top:1.5rem; right:2rem; user-select:none;
}
.exp-card-icon {
    font-size:2rem; color:var(--accent);
    margin-bottom:2rem;
}
.expertise-card h3 {
    font-family:var(--serif); font-size:1.6rem; font-weight:400;
    margin-bottom:1rem;
}
.expertise-card p { font-size:.9rem; color:var(--text-mid); line-height:1.7; }

/* ---- TIMELINE ---- */
.timeline { max-width:860px; }
.timeline-item { display:grid; grid-template-columns:100px 1fr; gap:0; margin-bottom:0; }
.timeline-item[data-timeline-persona="marketer"] { }
body.persona-marketer [data-timeline-persona="scholar"] { display:none; }
body.persona-scholar  [data-timeline-persona="marketer"] { display:none; }

.tl-year-col {
    padding:3rem 2rem 3rem 0;
    border-right:1px solid var(--border);
    text-align:right; position:relative;
}
.tl-year-col::after {
    content:'';
    position:absolute; right:-5px; top:3.5rem;
    width:9px; height:9px; border-radius:50%;
    background:var(--accent);
    box-shadow:0 0 10px var(--accent);
}
.tl-year {
    font-family:var(--serif); font-size:1.1rem;
    color:var(--text-dim); font-weight:300;
}
.tl-body {
    padding:3rem 0 3rem 3rem;
    border-bottom:1px solid var(--border);
}
.timeline-item:last-child .tl-body { border-bottom:none; }
.tl-role {
    font-family:var(--serif); font-size:1.5rem; font-weight:400;
    margin-bottom:.3rem;
}
.tl-company { font-size:.85rem; color:var(--accent); letter-spacing:.06em; text-transform:uppercase; margin-bottom:1rem; }
.tl-meta { font-size:.8rem; color:var(--text-dim); margin-bottom:1.2rem; }
.tl-desc { font-size:.9rem; color:var(--text-mid); line-height:1.7; margin-bottom:1.5rem; }
.tl-tags { display:flex; flex-wrap:wrap; gap:.5rem; }
.tl-tag {
    font-size:.72rem; font-weight:500; letter-spacing:.08em;
    text-transform:uppercase; padding:.3rem .8rem;
    border:1px solid var(--border); border-radius:2px;
    color:var(--text-dim);
}

/* ---- PUBLICATIONS ---- */
.pubs-list { display:flex; flex-direction:column; max-width:900px; }
.pub-item {
    display:grid; grid-template-columns:80px 1fr;
    gap:2rem; padding:2.5rem 0;
    border-bottom:1px solid var(--border);
    transition: background .3s;
}
.pub-item:first-child { border-top:1px solid var(--border); }
.pub-year {
    font-family:var(--serif); font-size:1rem;
    color:var(--text-dim); padding-top:.15rem;
}
.pub-content h3 {
    font-family:var(--serif); font-size:1.2rem; font-weight:400;
    margin-bottom:.5rem; line-height:1.4;
}
.pub-authors { font-size:.8rem; color:var(--text-dim); margin-bottom:.3rem; }
.pub-venue { font-size:.8rem; font-style:italic; color:var(--accent); }

/* ---- CASE STUDY BANNER ---- */
.cs-banner {
    position:relative; padding:12rem 0;
    background:url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&q=80&w=1200') center/cover no-repeat;
    display:flex; align-items:center; justify-content:center; text-align:center;
    overflow:hidden;
}
.cs-banner-overlay {
    position:absolute; inset:0;
    background:rgba(13,11,9,.82);
}
.cs-banner-content { position:relative; z-index:1; max-width:700px; padding:0 2rem; }
.cs-banner-content .heading { margin-bottom:1.2rem; }
.cs-banner-content p { color:var(--text-mid); font-size:1.1rem; margin-bottom:2.5rem; }

/* ---- SKILLS ---- */
.skills-cols {
    display:grid; grid-template-columns:1fr 1fr; gap:6rem;
    max-width:1000px; margin:0 auto;
}
.skills-col-title {
    font-family:var(--serif); font-size:1.5rem; font-weight:400;
    margin-bottom:2.5rem;
    padding-bottom:.8rem; border-bottom:1px solid var(--border);
}
.skill-row { margin-bottom:1.6rem; }
.skill-header { display:flex; justify-content:space-between; margin-bottom:.5rem; }
.skill-name { font-size:.82rem; font-weight:500; letter-spacing:.04em; }
.skill-pct { font-size:.75rem; color:var(--accent); font-family:var(--serif); }
.skill-track {
    height:2px; background:rgba(240,232,220,.06);
    border-radius:2px; overflow:hidden;
}
.skill-fill {
    height:100%; background:var(--accent);
    border-radius:2px;
    transition:width 1.6s var(--ease), background .5s;
}
body.persona-marketer .skills-cols > div:nth-child(2) { opacity:.25; filter:grayscale(1); }
body.persona-scholar  .skills-cols > div:nth-child(1) { opacity:.25; filter:grayscale(1); }

/* ---- CONTACT ---- */
.contact-section { text-align:center; }
.contact-desc { font-size:1.05rem; color:var(--text-mid); max-width:560px; margin:1.5rem auto 3rem; line-height:1.75; }
.contact-links { display:flex; justify-content:center; gap:1.2rem; flex-wrap:wrap; }
.social-btn {
    display:inline-flex; align-items:center; gap:.7rem;
    padding:1rem 2rem; border-radius:3px;
    font-size:.82rem; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
    background:rgba(240,232,220,.03); border:1px solid var(--border);
    color:var(--text); transition: all .35s var(--ease);
}
.social-btn i { font-size:1.1rem; }
.social-btn.whatsapp:hover  { background:#25D366; border-color:#25D366; color:#fff; transform:translateY(-2px); }
.social-btn.linkedin:hover  { background:#0077b5; border-color:#0077b5; color:#fff; transform:translateY(-2px); }
.social-btn.email:hover     { background:var(--accent); border-color:var(--accent); color:var(--bg); transform:translateY(-2px); }

/* ---- FOOTER ---- */
footer {
    padding:2.5rem 0;
    border-top:1px solid var(--border);
    text-align:center;
}
footer p { font-size:.8rem; color:var(--text-dim); letter-spacing:.06em; }

/* ---- RESPONSIVE ---- */
@media(max-width:1024px) {
    .hero { grid-template-columns:1fr; min-height:auto; }
    .hero-right { height:50vh; }
    .hero-left { padding:11rem 5% 5rem; }
    .expertise-grid { grid-template-columns:1fr; }
    .skills-cols { grid-template-columns:1fr; gap:3rem; }
}
@media(max-width:768px) {
    *, *::before, *::after { cursor:auto; }
    .cursor, .cursor-follower { display:none; }
    .section { padding:5rem 0; }
    .nav-links { display:none; flex-direction:column; position:absolute; top:100%; left:0; width:100%; background:rgba(13,11,9,.96); padding:2rem; gap:1.2rem; text-align:center; border-bottom:1px solid var(--border); }
    .nav-links.active { display:flex; }
    .mobile-menu-btn { display:flex; }
    .mobile-menu-btn.active .bar:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
    .mobile-menu-btn.active .bar:nth-child(2) { opacity:0; }
    .mobile-menu-btn.active .bar:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }
    .persona-switcher-wrapper { display:none; }
    .section-header { flex-direction:column; align-items:flex-start; }
    .timeline-item { grid-template-columns:60px 1fr; }
    .tl-body { padding-left:1.5rem; }
}