/* ==========================================================================
   jays.website — shared design system
   Single source of truth for typography, spacing, palette, nav, footer,
   buttons, and cards. Pages opt in via <link rel="stylesheet" href="/assets/site.css">.
   Palette keeps the existing purple identity but systematizes it and fixes
   contrast to WCAG AA.
   ========================================================================== */

:root {
  /* Brand palette — deep navy/slate base with a single warm accent.
     Distinctive + professional (capital-markets feel); avoids the
     purple-gradient / cyan-on-dark "AI-generated" tells. */
  --brand-1: #1e2b45;
  --brand-2: #0f172a;
  --brand-grad: linear-gradient(165deg, #101a30 0%, #1b2843 55%, #0f172a 100%);
  --accent: #d8a13a;           /* restrained gold — links, active states, accents */
  --accent-strong: #8c6200;    /* gold for text on white — WCAG AA (5.4:1) */

  /* Project category accents (thin top-bar per card) */
  --accent-trading: #3b6fd4;
  --accent-rental:  #c08a1e;
  --accent-business:#1f9d63;
  --accent-tools:   #7c74e8;

  /* Neutrals */
  --ink:      #1f2733;         /* body text on light — ~13:1 on white */
  --ink-soft: #4a5568;         /* secondary text — ~7:1 on white (AA) */
  --ink-mute: #5f6b7a;         /* muted but still AA on white */
  --surface:  #ffffff;
  --surface-2:#f5f6fa;
  --line:     #e2e8f0;

  /* On-dark (over the gradient) */
  --on-dark:       #ffffff;
  --on-dark-soft:  rgba(255,255,255,0.92);
  --on-dark-mute:  rgba(255,255,255,0.72);

  /* Type scale (1.25 ratio) */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --fs-xs: 0.8rem;
  --fs-sm: 0.9rem;
  --fs-base: 1rem;
  --fs-md: 1.15rem;
  --fs-lg: 1.4rem;
  --fs-xl: 1.9rem;
  --fs-2xl: 2.4rem;
  --fs-3xl: 3rem;

  /* Spacing scale */
  --sp-1: 0.25rem; --sp-2: 0.5rem; --sp-3: 0.75rem; --sp-4: 1rem;
  --sp-5: 1.5rem;  --sp-6: 2rem;   --sp-8: 3rem;    --sp-10: 4rem;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(0,0,0,0.12);
  --shadow-lg: 0 20px 40px rgba(0,0,0,0.16);
}

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

body {
  font-family: var(--font-sans);
  line-height: 1.65;
  color: var(--ink);
  background: var(--brand-grad);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: var(--sp-6); }

/* Visible keyboard focus everywhere (accessibility) */
a:focus-visible, button:focus-visible, input:focus-visible, label:focus-visible {
  outline: 3px solid #ffd34d;
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Buttons: one primary, one secondary ------------------------------- */
.btn {
  display: inline-block;
  font-weight: 700;
  font-size: var(--fs-sm);
  text-decoration: none;
  padding: 0.8rem 1.8rem;
  border-radius: 30px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #1a1305; box-shadow: 0 4px 15px rgba(0,0,0,0.25); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.22); }
.btn-secondary { background: transparent; color: var(--on-dark); border-color: rgba(255,255,255,0.55); }
.btn-secondary:hover { background: rgba(255,255,255,0.14); }

/* --- Top navigation (shared include) ----------------------------------- */
nav.site-nav {
  display: flex; align-items: center; gap: 0.25rem; flex-wrap: wrap;
  max-width: 1200px; margin: 0 auto var(--sp-5); padding: 0.6rem 1rem;
  background: rgba(10,13,22,0.90);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 12px; position: relative; z-index: 60;
}
nav.site-nav a {
  color: rgba(255,255,255,0.82); text-decoration: none;
  font-size: var(--fs-sm); font-weight: 500; padding: 0.4rem 0.8rem;
  border-radius: 7px; transition: background 0.15s, color 0.15s;
}
nav.site-nav a:hover { background: rgba(255,255,255,0.12); color: #fff; }
nav.site-nav a.active { background: rgba(255,255,255,0.18); color: #fff; font-weight: 600; }
nav.site-nav a.nav-brand { display: none; color: #fff; font-weight: 700; font-size: 0.95rem; }
nav.site-nav a.nav-resume { margin-left: auto; background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.24); color: #fff; font-weight: 600; }
nav.site-nav a.nav-resume:hover { background: rgba(255,255,255,0.24); }

/* Projects dropdown (hover on desktop, tap on mobile) */
.nav-group { position: relative; }
.nav-group > .nav-group-label {
  display: inline-flex; align-items: center; gap: 0.25rem;
  color: rgba(255,255,255,0.82); font-size: var(--fs-sm); font-weight: 500;
  padding: 0.4rem 0.8rem; border-radius: 7px; cursor: pointer; user-select: none;
}
.nav-group:hover > .nav-group-label,
.nav-group:focus-within > .nav-group-label { background: rgba(255,255,255,0.12); color: #fff; }
.nav-group-menu {
  position: absolute; top: 100%; left: 0; margin-top: 0.35rem;
  background: #141826; border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px; padding: 0.35rem; min-width: 210px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.35);
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: opacity 0.15s, transform 0.15s, visibility 0.15s; z-index: 70;
}
.nav-group:hover .nav-group-menu,
.nav-group:focus-within .nav-group-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-group-menu a { display: block; width: 100%; }

nav.site-nav .nav-burger { display: none; cursor: pointer; color: rgba(255,255,255,0.85); padding: 0.3rem 0.5rem; border-radius: 7px; margin-left: auto; line-height: 0; }
nav.site-nav .nav-burger:hover { background: rgba(255,255,255,0.12); }
nav.site-nav input.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }

@media (max-width: 820px) {
  nav.site-nav a.nav-brand { display: block; }
  nav.site-nav .nav-burger { display: block; }
  nav.site-nav > a:not(.nav-brand),
  nav.site-nav .nav-group { display: none; width: 100%; }
  nav.site-nav input.nav-toggle:checked ~ a:not(.nav-brand),
  nav.site-nav input.nav-toggle:checked ~ .nav-group { display: block; }
  .nav-group-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: transparent; border: none; padding: 0 0 0 0.75rem; min-width: 0; }
  nav.site-nav a.nav-resume { margin-left: 0; }
}

/* --- Hero -------------------------------------------------------------- */
.hero { background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.20); border-radius: 16px; padding: 2.5rem 3rem; margin-bottom: var(--sp-6); color: var(--on-dark); }
.hero-inner { display: flex; align-items: flex-start; gap: var(--sp-6); }
.hero-photo { width: 120px; height: 120px; border-radius: 50%; object-fit: cover; flex-shrink: 0; border: 3px solid rgba(255,255,255,0.35); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
.hero-text { flex: 1; }
.hero h1 { font-size: var(--fs-xl); font-weight: 700; letter-spacing: -0.01em; line-height: 1.35; margin-bottom: var(--sp-3); }
.section-title { font-size: var(--fs-xl); font-weight: 700; color: var(--on-dark); margin: var(--sp-8) 0 var(--sp-5); letter-spacing: -0.01em; }
.section-title.section-sub { font-size: var(--fs-lg); color: var(--on-dark-soft); margin-top: var(--sp-8); }
.hero p { font-size: var(--fs-md); line-height: 1.7; color: var(--on-dark-soft); max-width: 780px; margin-bottom: var(--sp-5); }
.hero-ctas { display: flex; gap: var(--sp-4); flex-wrap: wrap; }

/* --- Section + cards --------------------------------------------------- */
.panel { background: rgba(255,255,255,0.96); border-radius: 20px; padding: var(--sp-8); margin-top: var(--sp-6); box-shadow: var(--shadow); }
.panel h2 { text-align: center; font-size: var(--fs-2xl); margin-bottom: var(--sp-6); color: var(--ink); }
.panel h2.section-sub { font-size: var(--fs-lg); color: var(--ink-soft); margin-top: var(--sp-4); }

.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: var(--sp-6); }
.project-card { background: var(--surface); border-radius: 15px; padding: var(--sp-6); box-shadow: var(--shadow); transition: transform 0.3s ease, box-shadow 0.3s ease; border-top: 3px solid var(--card-accent, var(--brand-1)); display: flex; flex-direction: column; }
.project-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.project-card h3 { color: var(--ink); font-size: var(--fs-lg); margin-bottom: var(--sp-4); display: flex; align-items: center; gap: 0.5rem; }

/* Structured card blocks: Problem / Built / Stack / Outcome */
.card-block { margin-bottom: var(--sp-3); }
.card-block .label { display: block; font-size: var(--fs-xs); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-mute); margin-bottom: 0.15rem; }
.card-block p { color: var(--ink-soft); font-size: var(--fs-sm); line-height: 1.6; }
.card-todo { color: #6f4e00; background: #fff7e6; border: 1px dashed #c98f00; border-radius: 6px; padding: 0.15rem 0.5rem; font-size: var(--fs-xs); font-weight: 700; }

.features { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: var(--sp-2) 0 var(--sp-4); }
.feature-tag { background: var(--surface-2); color: var(--ink-soft); padding: 0.3rem 0.8rem; border-radius: 15px; font-size: var(--fs-xs); border: 1px solid var(--line); }

.project-link { display: inline-block; background: var(--card-accent, var(--brand-1)); color: #fff; padding: 0.7rem 1.6rem; border-radius: 25px; text-decoration: none; font-weight: 600; font-size: var(--fs-sm); transition: transform 0.2s ease, filter 0.2s ease; }
.project-link:hover { filter: brightness(1.08); transform: scale(1.04); }

/* Row holding the primary action + a secondary "case study" link */
.project-links { margin-top: auto; padding-top: var(--sp-3); display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.1rem; }
.case-study-link { display: inline-flex; align-items: center; gap: 0.25rem; color: var(--accent-strong); font-weight: 600; font-size: var(--fs-sm); text-decoration: none; }
.case-study-link:hover { text-decoration: underline; }
@media (prefers-reduced-motion: reduce) { .project-link:hover { transform: none; } }

/* --- Header (logo lockup) ---------------------------------------------- */
header.site-head { text-align: center; padding: var(--sp-10) 0 var(--sp-6); color: var(--on-dark); }
header.site-head .logo { font-size: var(--fs-3xl); font-weight: bold; margin-bottom: var(--sp-4); text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
header.site-head .tagline { font-size: var(--fs-lg); color: var(--on-dark-soft); }

/* --- Footer (shared include) ------------------------------------------- */
.site-footer { max-width: 1200px; margin: 2.5rem auto 0; padding: 1.25rem 1rem 2rem; text-align: center; font-size: var(--fs-sm); color: var(--on-dark-mute); position: relative; z-index: 5; }
.site-footer a { color: rgba(255,255,255,0.82); text-decoration: none; margin: 0 0.55rem; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer .sf-note { margin-top: 0.45rem; font-size: var(--fs-xs); color: rgba(255,255,255,0.55); }

@media (max-width: 768px) {
  .container { padding: var(--sp-4); }
  header.site-head .logo { font-size: var(--fs-2xl); }
  .panel { padding: var(--sp-6) var(--sp-4); }
  .project-grid { grid-template-columns: 1fr; }
  .hero { padding: 1.75rem; }
  .hero-inner { flex-direction: column; align-items: center; text-align: center; }
  .hero-photo { width: 100px; height: 100px; }
}