/* =========================================================================
   Mamadou Hady Bah — Portfolio professionnel
   Direction artistique : éditoriale, sobre, humaine — Studio HB
   ========================================================================= */

:root {
    /* Palette — encre chaude, papier ivoire, terre cuite en accent unique */
    --ink: #1c1a17;
    --ink-soft: #46403a;
    --stone: #6f6759;
    --stone-light: #a49a89;
    --paper: #faf7f1;
    --paper-alt: #f1ebe0;
    --line: #e0d7c6;
    --line-strong: #cabb9f;
    --accent: #a1462a;
    --accent-dark: #7c3520;
    --accent-tint: #f1e2d8;
    --white: #ffffff;

    --font-serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;
    --font-sans: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --container-max: 1180px;
    --prose-max: 640px;

    --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
    --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
    --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;
    --space-28: 7rem; --space-32: 8rem;

    --radius: 2px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--ink-soft);
    background: var(--paper);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; background: none; border: none; }
strong { color: var(--ink); font-weight: 600; }

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    color: var(--ink);
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.15;
}

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-6); }
.prose { max-width: var(--prose-max); }

.visually-hidden {
    position: absolute; width: 1px; height: 1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap;
}
.skip-link {
    position: absolute; left: -9999px; top: 0; background: var(--ink); color: var(--paper);
    padding: var(--space-3) var(--space-5); z-index: 2000;
}
.skip-link:focus { left: 0; }

/* ==================== READING PROGRESS ==================== */
.reading-progress {
    position: fixed; top: 0; left: 0; height: 2px; background: var(--accent);
    z-index: 1100; width: 0%; transition: width 0.1s linear;
}

/* ==================== NAVBAR ==================== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(250, 247, 241, 0.88);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}
.navbar.scrolled { background: rgba(250, 247, 241, 0.97); border-bottom-color: var(--line); }
.nav-container {
    max-width: var(--container-max); margin: 0 auto; padding: var(--space-5) var(--space-6);
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
    font-family: var(--font-serif); font-weight: 600; font-size: 1.15rem; color: var(--ink);
    text-decoration: none; letter-spacing: -0.01em;
}
.nav-logo em { font-style: italic; color: var(--accent); font-weight: 500; }
.nav-menu { display: flex; align-items: center; gap: var(--space-8); }
.nav-link {
    font-size: 0.9rem; font-weight: 500; color: var(--stone); text-decoration: none;
    position: relative; padding-bottom: 3px; transition: var(--transition-fast);
}
.nav-link:hover, .nav-link.active { color: var(--ink); }
.nav-link.active::after {
    content: ''; position: absolute; left: 0; bottom: -3px; width: 100%; height: 1px; background: var(--accent);
}
.nav-cta {
    color: var(--ink) !important; padding: var(--space-2) var(--space-5); border: 1px solid var(--line-strong);
    border-radius: var(--radius); font-weight: 600; text-decoration: none; font-size: 0.85rem;
    transition: var(--transition-fast);
}
.nav-cta:hover { border-color: var(--ink); background: var(--ink); color: var(--paper) !important; }
.mobile-menu-btn {
    display: none; font-size: 1.4rem; color: var(--ink); padding: var(--space-2);
    width: 40px; height: 40px; align-items: center; justify-content: center;
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-6);
    border-radius: var(--radius); font-weight: 600; font-size: 0.875rem; text-decoration: none;
    border: 1px solid transparent; transition: var(--transition-fast); white-space: nowrap;
    letter-spacing: 0.01em;
}
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); }
.btn-secondary { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--ink); }
.btn-outline { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-outline:hover { background: var(--accent); color: var(--paper); }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: 0.8rem; }
.btn-text {
    display: inline-flex; align-items: center; gap: var(--space-2); color: var(--ink); text-decoration: none;
    font-weight: 600; font-size: 0.9rem; border-bottom: 1px solid var(--line-strong); padding-bottom: 2px;
    transition: var(--transition-fast);
}
.btn-text:hover { border-color: var(--accent); color: var(--accent); }

/* ==================== SECTION SCAFFOLDING ==================== */
.section { padding: var(--space-24) 0; border-top: 1px solid var(--line); }
.section:first-of-type { border-top: none; }
.section-alt { background: var(--paper-alt); }

.kicker {
    display: flex; align-items: baseline; gap: var(--space-3); margin-bottom: var(--space-5);
    font-family: var(--font-sans); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--accent);
}
.kicker .num { color: var(--stone-light); font-weight: 500; }
.kicker::after { content: ''; flex: 1; height: 1px; background: var(--line); margin-left: var(--space-2); max-width: 120px; }

.section-head { margin-bottom: var(--space-16); }
.section-head h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); margin-bottom: var(--space-4); max-width: 720px; }
.section-head p { color: var(--stone); font-size: 1.05rem; max-width: var(--prose-max); }

/* ==================== HERO ==================== */
.hero { padding: calc(var(--space-32) + 1rem) 0 var(--space-24); border-top: none; }
.hero-container {
    max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-6);
    display: grid; grid-template-columns: 1.2fr 0.8fr; gap: var(--space-16); align-items: center;
}
.hero-eyebrow {
    font-size: 0.85rem; color: var(--stone); margin-bottom: var(--space-6); letter-spacing: 0.01em;
}
.hero-eyebrow::before { content: '— '; color: var(--accent); }
.hero-title {
    font-size: clamp(2.5rem, 5.5vw, 4rem); font-weight: 500; line-height: 1.05;
    color: var(--ink); letter-spacing: -0.02em; margin-bottom: var(--space-3);
}
.hero-role {
    font-family: var(--font-serif); font-style: italic; font-weight: 400; font-size: clamp(1.15rem, 2vw, 1.5rem);
    color: var(--accent); margin-bottom: var(--space-6);
}
.hero-description {
    font-size: 1.1rem; color: var(--ink-soft); max-width: 560px; margin-bottom: var(--space-8); line-height: 1.7;
}
.hero-buttons { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-10); }
.hero-social { display: flex; gap: var(--space-5); align-items: center; }
.social-icon {
    width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
    color: var(--stone); text-decoration: none; transition: var(--transition-fast); font-size: 1rem;
    border: 1px solid var(--line); border-radius: 50%;
}
.social-icon:hover { color: var(--accent); border-color: var(--accent); }

.hero-scroll-cue {
    display: inline-flex; align-items: center; gap: 8px; margin-top: var(--space-10);
    font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--stone);
    text-decoration: none; border-bottom: 1px solid var(--line-strong); padding-bottom: 4px; transition: var(--transition-fast);
}
.hero-scroll-cue:hover { color: var(--accent); border-color: var(--accent); }
.hero-scroll-cue span { font-size: 0.9rem; }

.hero-visual { position: relative; }
.hero-frame { position: relative; }
.hero-frame::before {
    content: ''; position: absolute; top: -18px; left: -18px; right: 18px; bottom: 18px;
    border: 1px solid var(--accent); z-index: 0;
}
.hero-avatar-wrap {
    position: relative; z-index: 1; overflow: hidden; aspect-ratio: 4 / 5;
    filter: grayscale(8%);
}
.hero-avatar-wrap img { width: 100%; height: 100%; object-fit: cover; }
.hero-caption {
    display: flex; align-items: baseline; gap: var(--space-3); margin-top: var(--space-6); padding-top: var(--space-5);
    border-top: 1px solid var(--line);
}
.hero-caption .value { font-family: var(--font-serif); font-size: 1.6rem; color: var(--ink); font-weight: 500; }
.hero-caption .label { font-size: 0.85rem; color: var(--stone); max-width: 220px; }

/* ==================== ABOUT ==================== */
.about-grid { display: grid; grid-template-columns: 0.72fr 1.28fr; gap: var(--space-16); align-items: start; }
.about-image { overflow: hidden; aspect-ratio: 2 / 3; }
.about-image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(8%); }
.about-text p { color: var(--ink-soft); margin-bottom: var(--space-5); font-size: 1.05rem; max-width: 640px; }
.about-stats {
    display: flex; gap: var(--space-10); margin: var(--space-10) 0; padding-top: var(--space-8);
    border-top: 1px solid var(--line); flex-wrap: wrap;
}
.stat-item { min-width: 140px; }
.stat-number { display: block; font-family: var(--font-serif); font-size: 2.25rem; color: var(--ink); font-weight: 500; line-height: 1; }
.stat-label { display: block; font-size: 0.8rem; color: var(--stone); margin-top: var(--space-2); max-width: 160px; }
.about-actions { display: flex; flex-wrap: wrap; gap: var(--space-5); align-items: center; }
.mini-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--stone-light); font-weight: 600; margin-bottom: var(--space-3); }
.about-values { margin-bottom: var(--space-10); }
.about-values .plain-row > div { display: flex; flex-direction: column; gap: 2px; }
.about-values .plain-row .sub { max-width: 480px; }

/* ==================== EDITORIAL LIST (Expertises / Services) ==================== */
.editorial-list { border-top: 1px solid var(--line); }
.editorial-row {
    display: grid; grid-template-columns: 90px 1fr 1.3fr; gap: var(--space-8); padding: var(--space-8) 0;
    border-bottom: 1px solid var(--line); align-items: baseline;
}
.editorial-row .idx { font-family: var(--font-serif); font-size: 1.1rem; color: var(--stone-light); font-style: italic; }
.editorial-row h3 { font-size: 1.4rem; font-weight: 500; }
.editorial-row .desc { color: var(--stone); font-size: 0.98rem; }
.editorial-row .desc p { margin-bottom: var(--space-3); }
.tag-list { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.tag {
    font-size: 0.75rem; font-weight: 600; color: var(--accent-dark); background: var(--accent-tint);
    padding: 3px var(--space-3); letter-spacing: 0.01em;
}

/* ==================== TIMELINE (Experience) — editorial two-column ==================== */
.timeline { border-top: 1px solid var(--line); }
.timeline-item {
    display: grid; grid-template-columns: 160px 1fr; gap: var(--space-8); padding: var(--space-8) 0;
    border-bottom: 1px solid var(--line);
}
.timeline-period { font-size: 0.85rem; color: var(--stone-light); letter-spacing: 0.01em; padding-top: 2px; }
.timeline-title { font-size: 1.3rem; margin-bottom: var(--space-1); }
.timeline-company { color: var(--accent); font-weight: 600; font-size: 0.9rem; margin-bottom: var(--space-3); }
.timeline-description { color: var(--stone); font-size: 0.98rem; max-width: 640px; }
.timeline-highlights { margin-top: var(--space-3); }

/* ==================== REALISATIONS — case studies ==================== */
.case-study { border-top: 1px solid var(--line); }
.case { padding: var(--space-12) 0; border-bottom: 1px solid var(--line); }
.case-head {
    display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-6); margin-bottom: var(--space-5);
    flex-wrap: wrap;
}
.case-label { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--stone); }
.case-label.in-progress { color: var(--accent); }
.case h3 { font-size: clamp(1.5rem, 2.5vw, 2rem); max-width: 640px; }
.case-body { display: grid; grid-template-columns: 1.5fr 1fr; gap: var(--space-10); align-items: start; }
.case-body p { color: var(--stone); font-size: 1rem; max-width: 560px; }
.case-meta { display: flex; flex-direction: column; gap: var(--space-5); }
.case-result { font-family: var(--font-serif); font-size: 2rem; color: var(--ink); font-weight: 500; line-height: 1; }
.case-result span { display: block; font-family: var(--font-sans); font-size: 0.78rem; color: var(--stone); font-weight: 500; margin-top: var(--space-2); text-transform: none; }

/* ==================== FORMATION & LANGUES ==================== */
.grid-2-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-20); align-items: start; }
.plain-list { border-top: 1px solid var(--line); }
.plain-row {
    display: flex; justify-content: space-between; gap: var(--space-4); padding: var(--space-5) 0;
    border-bottom: 1px solid var(--line); align-items: baseline; flex-wrap: wrap;
}
.plain-row strong { display: block; font-size: 1rem; }
.plain-row .sub { color: var(--stone); font-size: 0.85rem; }
.plain-row .when { font-size: 0.8rem; color: var(--stone-light); white-space: nowrap; }

/* ==================== ENGAGEMENT ==================== */
.engagement-layout { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: var(--space-14); align-items: start; }
.engagement-image { overflow: hidden; aspect-ratio: 4 / 5; }
.engagement-image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(10%); }
.engagement-list { border-top: 1px solid var(--line); }
.engagement-row { padding: var(--space-6) 0; border-bottom: 1px solid var(--line); }
.engagement-row h3 { font-size: 1.15rem; margin-bottom: 2px; }
.engagement-org { color: var(--accent); font-size: 0.85rem; font-weight: 600; margin-bottom: var(--space-2); }
.engagement-row p:last-child { color: var(--stone); font-size: 0.95rem; }

/* ==================== CONTACT ==================== */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: var(--space-16); align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: var(--space-6); margin-top: var(--space-8); }
.contact-item { border-top: 1px solid var(--line); padding-top: var(--space-4); }
.contact-item h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--stone-light); font-weight: 600; margin-bottom: var(--space-2); }
.contact-item p, .contact-item a { color: var(--ink-soft); font-size: 1rem; text-decoration: none; }
.contact-item a:hover { color: var(--accent); }

.form-group { margin-bottom: var(--space-6); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--stone); margin-bottom: var(--space-2); text-transform: uppercase; letter-spacing: 0.04em; }
.form-input, .form-select, .form-textarea {
    width: 100%; padding: var(--space-3) 0; border: none; border-bottom: 1px solid var(--line-strong);
    font-family: inherit; font-size: 1rem; color: var(--ink); transition: var(--transition-fast); background: transparent;
    border-radius: 0;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--accent); }
.form-textarea { resize: vertical; min-height: 110px; }
.field-error { color: var(--accent-dark); font-size: 0.8rem; margin-top: var(--space-1); display: none; }
.field-error.visible { display: block; }
.form-status { padding: var(--space-4) 0; margin-bottom: var(--space-5); font-size: 0.95rem; display: none; border-bottom: 1px solid var(--line); }
.form-status.visible { display: block; }
.form-status.loading { color: var(--stone); }
.form-status.success { color: #3d5d3a; }
.form-status.error { color: var(--accent-dark); }
.honeypot-field { position: absolute; left: -9999px; }

/* ==================== FOOTER ==================== */
.footer { background: var(--ink); color: var(--stone-light); padding: var(--space-16) 0 var(--space-8); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-10); margin-bottom: var(--space-12); }
.footer-title { font-family: var(--font-serif); color: var(--paper); font-size: 1.4rem; font-weight: 500; margin-bottom: var(--space-3); }
.footer-desc { font-size: 0.9rem; color: var(--stone-light); max-width: 320px; }
.footer-heading { color: var(--paper); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: var(--space-4); }
.footer-links { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-links a { color: var(--stone-light); text-decoration: none; font-size: 0.92rem; transition: var(--transition-fast); }
.footer-links a:hover { color: var(--paper); }
.footer-social { display: flex; gap: var(--space-4); margin-top: var(--space-5); }
.footer-social .social-icon { border-color: rgba(250,247,241,0.2); color: var(--stone-light); }
.footer-social .social-icon:hover { color: var(--paper); border-color: var(--paper); }
.footer-bottom {
    border-top: 1px solid rgba(250,247,241,0.12); padding-top: var(--space-6); display: flex; justify-content: space-between;
    flex-wrap: wrap; gap: var(--space-3); font-size: 0.8rem; color: var(--stone-light);
}

/* ==================== BACK TO TOP ==================== */
.back-to-top {
    position: fixed; bottom: var(--space-8); right: var(--space-8); width: 44px; height: 44px; border-radius: 50%;
    background: var(--ink); color: var(--paper); display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(8px); transition: var(--transition);
    z-index: 900; font-size: 1rem;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--accent); }

/* ==================== ANIMATIONS ==================== */
.animate-on-scroll { opacity: 0; transform: translateY(14px); transition: opacity 0.7s ease, transform 0.7s ease; }
.animate-on-scroll.in-view { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
    html { scroll-behavior: auto; }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; }
    .hero-visual { max-width: 380px; margin: 0 auto; order: -1; }
    .about-grid { grid-template-columns: 1fr; }
    .about-image { max-width: 340px; }
    .engagement-layout { grid-template-columns: 1fr; }
    .engagement-image { max-width: 420px; margin: 0 auto; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .case-body { grid-template-columns: 1fr; }
    .editorial-row { grid-template-columns: 60px 1fr; }
    .editorial-row .desc { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--paper);
        flex-direction: column; align-items: flex-start; padding: var(--space-6); border-top: 1px solid var(--line);
        gap: var(--space-5);
    }
    .nav-menu.mobile-active { display: flex; }
    .mobile-menu-btn { display: flex; }
    .hero { padding: var(--space-24) 0 var(--space-16); }
    .section { padding: var(--space-16) 0; }
    .section-head { margin-bottom: var(--space-10); }
    .timeline-item { grid-template-columns: 1fr; gap: var(--space-2); }
    .grid-2-col { grid-template-columns: 1fr; gap: var(--space-12); }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
    .footer-bottom { flex-direction: column; }
    .about-stats { gap: var(--space-6); }
}

@media (max-width: 480px) {
    .container, .hero-container { padding: 0 var(--space-4); }
    .hero-buttons { flex-direction: column; width: 100%; }
    .hero-buttons .btn { width: 100%; justify-content: center; }
    .hero-frame::before { top: -10px; left: -10px; right: 10px; bottom: 10px; }
}

@media print {
    .navbar, .back-to-top, .reading-progress, .mobile-menu-btn, .hero-social, #contact { display: none !important; }
    body { color: #000; }
}