/*
 * Modern design system for isaiahmann.com
 * Aesthetic: warm editorial — cream background, deep navy ink, terracotta accent.
 */

:root {
    --bg: #faf6ef;
    --bg-elevated: #ffffff;
    --bg-muted: #f1ebe0;
    --ink: #1a2238;
    --ink-soft: #2c3550;
    --ink-mute: #6b7388;
    --accent: #d96a3d;
    --accent-deep: #b8512a;
    --hairline: rgba(26, 34, 56, 0.12);
    --hairline-strong: rgba(26, 34, 56, 0.22);
    --shadow-sm: 0 1px 2px rgba(26, 34, 56, 0.06);
    --shadow-md: 0 12px 32px -16px rgba(26, 34, 56, 0.25);
    --shadow-lg: 0 30px 70px -30px rgba(26, 34, 56, 0.35);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-pill: 999px;
    --font-display: "Fraunces", "Iowan Old Style", "Georgia", serif;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    --container: 1120px;
    --gutter: clamp(20px, 5vw, 48px);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--ink);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover { color: var(--accent-deep); }

::selection {
    background: var(--accent);
    color: #fff;
}

/* ─────────────  Layout primitives  ───────────── */

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding-inline: var(--gutter);
}

.section {
    padding-block: clamp(64px, 9vw, 120px);
}

.section + .section {
    border-top: 1px solid var(--hairline);
}

.eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
    margin: 0 0 18px;
}

.eyebrow .dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    margin-right: 10px;
    transform: translateY(-1px);
    animation: pulse 2.8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: translateY(-1px) scale(1); }
    50%      { opacity: 0.5; transform: translateY(-1px) scale(0.85); }
}

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin: 0 0 0.4em;
    line-height: 1.05;
}

h1 { font-size: clamp(2.6rem, 6.5vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 1.8vw, 1.55rem); }

p { margin: 0 0 1em; color: var(--ink-soft); }

.lede {
    font-family: var(--font-body);
    font-size: clamp(1.1rem, 1.6vw, 1.35rem);
    line-height: 1.55;
    color: var(--ink-soft);
    font-weight: 400;
    max-width: 56ch;
}

/* ─────────────  Navigation  ───────────── */

.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(250, 246, 239, 0.82);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--hairline);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.1rem;
    letter-spacing: -0.01em;
    font-weight: 500;
}

.nav-brand-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--hairline-strong);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    font-size: 14px;
    color: var(--ink-soft);
    font-weight: 500;
    position: relative;
}

.nav-links a:hover { color: var(--ink); }

.nav-links a.is-active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -22px;
    height: 2px;
    background: var(--accent);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: var(--ink);
    color: #fff !important;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: -0.005em;
}

.nav-cta:hover { background: var(--accent-deep); color: #fff !important; }

@media (max-width: 640px) {
    .nav-links { gap: 16px; }
    .nav-links .nav-link-hide-sm { display: none; }
}

/* ─────────────  Hero  ───────────── */

.hero {
    padding-block: clamp(72px, 11vw, 140px) clamp(56px, 8vw, 100px);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -40%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    max-width: 720px;
    max-height: 720px;
    background: radial-gradient(closest-side, rgba(217, 106, 61, 0.18), transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: clamp(32px, 6vw, 80px);
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px 6px 8px;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-pill);
    background: var(--bg-elevated);
    font-size: 12.5px;
    color: var(--ink-soft);
    margin-bottom: 22px;
}

.hero-tag-badge {
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-pill);
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.hero h1 {
    margin-bottom: 22px;
}

.hero h1 .accent {
    color: var(--accent);
}

.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 22px;
    border-radius: var(--radius-pill);
    font-size: 14.5px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
    background: var(--ink);
    color: #fff !important;
}
.btn-primary:hover { background: var(--accent-deep); }

.btn-ghost {
    background: transparent;
    color: var(--ink) !important;
    border-color: var(--hairline-strong);
}
.btn-ghost:hover { border-color: var(--ink); }

.btn-arrow {
    transition: transform 0.2s ease;
}
.btn:hover .btn-arrow { transform: translateX(3px); }

.hero-portrait {
    position: relative;
    aspect-ratio: 4 / 5;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-muted);
    box-shadow: var(--shadow-lg);
}

.hero-portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-portrait::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(26, 34, 56, 0.25));
}

@media (max-width: 880px) {
    .hero-inner { grid-template-columns: 1fr; }
    .hero-portrait { max-width: 360px; margin-inline: auto; }
}

/* ─────────────  Featured project (Naru)  ───────────── */

.featured {
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-muted) 100%);
}

.featured-card {
    background: var(--bg-elevated);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: clamp(28px, 4vw, 48px);
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: clamp(28px, 5vw, 56px);
    align-items: center;
}

.featured-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin: 22px 0 26px;
    color: var(--ink-mute);
    font-size: 13.5px;
}

.featured-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.featured-meta span::before {
    content: "";
    width: 4px;
    height: 4px;
    background: var(--ink-mute);
    border-radius: 50%;
}

.featured-meta span:first-child::before { display: none; }

.featured-visual {
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #f5efe2;
    border: 1px solid var(--hairline);
}

.featured-visual img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 8%;
}

@media (max-width: 820px) {
    .featured-card { grid-template-columns: 1fr; }
    .featured-visual { order: -1; aspect-ratio: 16 / 10; }
    .featured-visual img { padding: 4%; }
}

/* ─────────────  Capabilities grid  ───────────── */

.capabilities {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 40px;
}

.capability {
    padding: 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.capability:hover {
    transform: translateY(-2px);
    border-color: var(--hairline-strong);
    box-shadow: var(--shadow-md);
}

.capability-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--bg-muted);
    margin-bottom: 16px;
    font-size: 18px;
}

.capability h3 {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.005em;
    margin-bottom: 8px;
}

.capability p {
    font-size: 14.5px;
    margin: 0;
    color: var(--ink-mute);
    line-height: 1.55;
}

/* ─────────────  Experience / timeline  ───────────── */

.experience-list {
    margin-top: 36px;
    border-top: 1px solid var(--hairline);
}

.experience-row {
    display: grid;
    grid-template-columns: 160px 1fr auto;
    gap: 24px;
    align-items: baseline;
    padding: 22px 4px;
    border-bottom: 1px solid var(--hairline);
    transition: background 0.2s ease;
}

.experience-row:hover { background: rgba(255, 255, 255, 0.6); }

.experience-row .when {
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 0.04em;
    color: var(--ink-mute);
    text-transform: uppercase;
}

.experience-row .what { color: var(--ink); }
.experience-row .what .role { display: block; font-size: 14px; color: var(--ink-mute); margin-top: 2px; }
.experience-row .where { font-size: 14px; color: var(--ink-mute); }

@media (max-width: 720px) {
    .experience-row {
        grid-template-columns: 1fr;
        gap: 4px;
        padding-block: 18px;
    }
    .experience-row .where { display: none; }
}

/* ─────────────  Selected projects strip  ───────────── */

.project-strip {
    margin-top: 36px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.project-chip {
    display: block;
    padding: 22px;
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    border: 1px solid var(--hairline);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.project-chip:hover {
    transform: translateY(-2px);
    border-color: var(--hairline-strong);
    color: var(--ink) !important;
}

.project-chip h3 {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 4px;
}

.project-chip p {
    margin: 0;
    font-size: 13.5px;
    color: var(--ink-mute);
}

/* ─────────────  CTA / contact  ───────────── */

.cta {
    background: var(--ink);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: clamp(36px, 6vw, 64px);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(circle at 20% 20%, rgba(217, 106, 61, 0.35), transparent 40%),
      radial-gradient(circle at 80% 70%, rgba(217, 106, 61, 0.18), transparent 50%);
    pointer-events: none;
}

.cta > * { position: relative; }

.cta h2 { color: #fff; }
.cta p {
    color: rgba(255, 255, 255, 0.75);
    max-width: 540px;
    margin-inline: auto;
}

.cta .btn-primary {
    background: var(--accent);
    color: #fff !important;
}
.cta .btn-primary:hover { background: #fff; color: var(--ink) !important; }

.cta .btn-ghost {
    color: #fff !important;
    border-color: rgba(255, 255, 255, 0.3);
}
.cta .btn-ghost:hover { border-color: #fff; }

/* ─────────────  Footer  ───────────── */

.footer {
    padding-block: 48px;
    border-top: 1px solid var(--hairline);
    color: var(--ink-mute);
    font-size: 13.5px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-socials {
    display: flex;
    gap: 18px;
}

.footer-socials a {
    color: var(--ink-mute);
    transition: color 0.2s ease;
}

.footer-socials a:hover { color: var(--accent); }

.footer-socials svg {
    width: 18px;
    height: 18px;
    display: block;
}

/* ─────────────  Utility  ───────────── */

.muted { color: var(--ink-mute); }
.accent-text { color: var(--accent); }
.no-wrap { white-space: nowrap; }

/* Light reveal animation on scroll */
.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in {
    opacity: 1;
    transform: translateY(0);
}