/* =========================================================
   Sophia Ize-Iyamu, PM Portfolio
   Black · Gold · Silver
   ========================================================= */

:root {
  --ink: #F4F4F5;          /* primary text, near-white */
  --ink-soft: #D4D4D8;     /* secondary text, bright silver */
  --paper: #0A0A0D;        /* page background, rich near-black */
  --paper-warm: #15151B;   /* elevated surface */
  --rule: #34343C;         /* visible borders */
  --rule-soft: #25252B;    /* subtle borders */
  --accent: #D4B26B;       /* champagne gold */
  --accent-deep: #9C7E45;  /* deep gold */
  --muted: #8A8A92;        /* tertiary text, silver */

  --serif: "Source Serif 4", "Source Serif Pro", Charter, Cambria, Georgia, serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --maxw: 1180px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);

  --t-fast: 160ms;
  --t-med:  280ms;
  --ease: cubic-bezier(.2,.7,.2,1);

  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--ink);
  text-decoration-color: var(--rule);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--t-fast) var(--ease), text-decoration-color var(--t-fast) var(--ease);
}
a:hover { color: var(--accent); text-decoration-color: var(--accent); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0 0 0.6em;
  color: var(--ink);
}
h1 { font-size: clamp(2.4rem, 5.5vw, 4.4rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 {
  font-size: 0.78rem; font-family: var(--sans); font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

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

/* =========================================================
   Layout
   ========================================================= */
.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--sans); font-size: 0.78rem;
  letter-spacing: 0.16em; text-transform: uppercase;
  font-weight: 600; color: var(--accent);
}
.eyebrow::before {
  content: ""; width: 1.5rem; height: 1px; background: currentColor;
}

/* =========================================================
   Top nav
   ========================================================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--rule-soft);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--maxw); margin-inline: auto;
  padding: 0.95rem var(--gutter);
}
.nav__brand {
  font-family: var(--serif); font-size: 1.15rem;
  text-decoration: none; color: var(--ink);
}
.nav__brand strong { font-weight: 600; }
.nav__brand span { color: var(--muted); font-style: italic; margin-left: 0.45rem; }
.nav__links { display: flex; gap: 1.6rem; list-style: none; padding: 0; margin: 0; }
.nav__links a { font-size: 0.92rem; text-decoration: none; color: var(--ink-soft); }
.nav__links a:hover { color: var(--accent); }

@media (max-width: 640px) {
  .nav__links { display: none; }
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  padding-block: clamp(4rem, 10vw, 7rem) clamp(2rem, 5vw, 4rem);
}
.hero__title { margin-bottom: 0.4em; }
.hero__title em { font-style: italic; color: var(--accent); }
.hero__sub {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--ink-soft); max-width: 56ch;
}
.hero__note {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.96rem;
  color: var(--muted);
  margin-top: 1.1rem;
  max-width: 56ch;
}
.hero__meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-top: 1.6rem;
}
.hero__meta .chip {
  font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
  background: var(--paper-warm);
}

/* =========================================================
   Project bubbles, stacked cards, all visible
   ========================================================= */
.work {
  padding-block: clamp(2rem, 5vw, 4rem) clamp(4rem, 10vw, 7rem);
}
.work__head {
  display: flex; flex-wrap: wrap; align-items: end;
  justify-content: space-between; gap: 1rem;
  margin-bottom: 2.5rem;
}
.work__head h2 { margin: 0.4rem 0 0; }
.work__count {
  font-family: var(--mono); font-size: 0.78rem;
  color: var(--muted); letter-spacing: 0.06em;
}

/* Two-column layout: sticky TOC sidebar + stacked bubbles */
.work__layout {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: 1fr;
}
@media (min-width: 920px) {
  .work__layout {
    grid-template-columns: 220px 1fr;
    align-items: start;
  }
}

.project-toc {
  font-size: 0.92rem;
}
@media (min-width: 920px) {
  .project-toc {
    position: sticky;
    top: 5rem;
    align-self: start;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: 0.35rem;
    scrollbar-width: thin;
    scrollbar-color: var(--rule) transparent;
  }
  .project-toc::-webkit-scrollbar { width: 6px; }
  .project-toc::-webkit-scrollbar-track { background: transparent; }
  .project-toc::-webkit-scrollbar-thumb {
    background: var(--rule);
    border-radius: 3px;
  }
  .project-toc::-webkit-scrollbar-thumb:hover { background: var(--muted); }
}

.project-toc__label {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.project-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 1px solid var(--rule-soft);
}
.project-toc__list li { margin: 0; }
.project-toc__list a {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  column-gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  text-decoration: none;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.project-toc__list a:hover,
.project-toc__list a:focus-visible {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--paper-warm);
  outline: none;
}
.project-toc__num {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}
.project-toc__list a:hover .project-toc__num,
.project-toc__list a:focus-visible .project-toc__num {
  color: var(--accent);
}
.project-toc__main {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}
.project-toc__name {
  font-family: var(--serif);
  font-size: 0.95rem;
  line-height: 1.25;
}
.project-toc__industry {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  line-height: 1.2;
}
.project-toc__list a:hover .project-toc__industry,
.project-toc__list a:focus-visible .project-toc__industry {
  color: var(--accent-deep);
}

.project-stack {
  display: grid;
  gap: 1.6rem;
}

.project-bubble {
  background: #1A1A22;             /* visibly elevated above page bg */
  border: 1px solid #3F3F48;       /* clearly visible border */
  border-radius: 14px;
  padding: clamp(1.6rem, 3vw, 2.6rem);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 1px 0 rgba(0, 0, 0, 0.5),
    0 24px 48px -20px rgba(0, 0, 0, 0.75);
  scroll-margin-top: 5rem;
}

.panel__eyebrow {
  font-family: var(--mono); font-size: 0.74rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.6rem;
}
.panel__title {
  font-family: var(--serif); font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 0.6em; letter-spacing: -0.02em;
}
.panel__title em { color: var(--accent); font-style: italic; }
.panel__desc {
  color: var(--ink-soft); font-size: 1.02rem;
  max-width: 60ch; margin: 0 0 1.2em;
}
.panel__desc strong { color: var(--ink); font-weight: 500; }

.panel__meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  align-items: center;
  margin: 1.4rem 0 2rem;
}
.panel__meta-label {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 0.25rem;
}
.panel__meta-label::after { content: ":"; opacity: 0.7; }
.panel__meta .chip {
  font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
}
.panel__meta .chip--firm {
  background: var(--ink); color: var(--paper);
  border-color: var(--ink);
  font-family: var(--sans); font-weight: 500;
}

.panel__actions {
  display: flex; flex-wrap: wrap; gap: 0.7rem;
  margin-top: 2rem;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  appearance: none;
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--sans); font-size: 0.94rem; font-weight: 500;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn--primary {
  background: var(--accent); color: var(--paper);
  border-color: var(--accent);
}
.btn--primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); color: var(--paper); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn--ghost:hover { color: var(--accent); border-color: var(--accent); }
.btn__icon {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  width: 14px; height: 14px;
}
.btn__icon svg {
  width: 14px; height: 14px;
  display: block;
  flex: 0 0 auto;
  stroke-width: 1.7;
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
  background: var(--paper-warm);
  border-top: 1px solid var(--rule);
  padding-block: clamp(3rem, 5vw, 4rem);
  color: var(--ink-soft);
}
.footer h2 {
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  margin: 0.4rem 0 0.6em;
}
.footer a { color: var(--ink); text-decoration-color: var(--rule); }
.footer a:hover { color: var(--accent); text-decoration-color: var(--accent); }
.footer__email {
  display: inline-block;
  font-family: var(--serif); font-size: 1.25rem;
  font-style: italic;
  margin-top: 0.6rem;
}

.contact-icons {
  display: flex;
  gap: 0.7rem;
  margin-top: 1.6rem;
}
.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  color: var(--ink);
  text-decoration: none;
  background: transparent;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.contact-icon:hover,
.contact-icon:focus-visible {
  color: var(--paper);
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
  outline: none;
}
.contact-icon svg {
  width: 20px;
  height: 20px;
  display: block;
}
.footer__bar {
  display: flex; justify-content: space-between; flex-wrap: wrap;
  gap: 1rem; margin-top: 2.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem; color: var(--muted);
}

/* =========================================================
   Reduced motion / print
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

@media print {
  .nav, .footer, .panel__actions { display: none; }
  body { background: white; color: black; }
  .project-bubble { page-break-after: always; border: 1px solid #ccc; box-shadow: none; }
}