/* =====================================================================
   GM SUN SYSTEM SOLAR — Public stylesheet
   Design direction: premium, warm-solar, editorial. Serif display +
   geometric sans body. Deep navy-blue + solar amber + cream canvas.
   ===================================================================== */

/* ---- Design tokens ---- */
:root {
  --color-bg:          #faf7f1;   /* cream canvas */
  --color-bg-alt:      #f1ece1;
  --color-surface:     #ffffff;
  --color-ink:         #0f1a2a;   /* deep navy */
  --color-ink-soft:    #3a4a60;
  --color-muted:       #697689;
  --color-line:        #e4dccc;
  --color-accent:      #e49620;   /* solar amber */
  --color-accent-hi:   #f6b94a;
  --color-accent-deep: #b06f10;
  --color-sun:         #ffcf5e;
  --color-sky:         #13284a;   /* hero deep blue */
  --color-sky-2:       #1f3f72;
  --color-danger:      #b23030;
  --color-ok:          #2f7d4a;

  --font-serif:  "Fraunces", "Playfair Display", Georgia, serif;
  --font-sans:   "Inter", "Satoshi", system-ui, -apple-system, "Segoe UI", sans-serif;

  --r-sm: 6px;
  --r:    12px;
  --r-lg: 22px;
  --r-xl: 32px;

  --shadow-sm: 0 1px 2px rgba(15,26,42,.06), 0 1px 1px rgba(15,26,42,.04);
  --shadow:    0 8px 30px rgba(15,26,42,.08);
  --shadow-lg: 0 24px 60px -20px rgba(15,26,42,.25);

  --container: 1200px;
  --pad: clamp(20px, 3.5vw, 48px);

  --ease: cubic-bezier(.2,.7,.1,1);
}

/* ---- Reset ---- */
*,*::before,*::after { box-sizing: border-box; }
html,body { margin:0; padding:0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
}
img, svg, video { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--color-accent-deep); }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
hr { border: 0; border-top: 1px solid var(--color-line); margin: 3rem 0; }
::selection { background: var(--color-accent); color: #fff; }

/* ---- Typography ---- */
h1,h2,h3,h4 { font-family: var(--font-serif); font-weight: 500; color: var(--color-ink); letter-spacing: -0.01em; margin: 0 0 .5em; line-height: 1.12; }
h1 { font-size: clamp(2.4rem, 5.2vw, 4.4rem); font-weight: 500; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2vw, 1.55rem); }
h4 { font-size: 1.1rem; }
p  { margin: 0 0 1em; color: var(--color-ink-soft); }
.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
  margin-bottom: 1rem;
}
.lead { font-size: 1.1rem; color: var(--color-ink-soft); max-width: 65ch; }
.muted { color: var(--color-muted); }

/* ---- Layout ---- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--pad); }
.section   { padding: clamp(64px, 9vw, 120px) 0; }
.section--tight { padding: clamp(48px, 6vw, 80px) 0; }
.section--alt   { background: var(--color-bg-alt); }
.section--dark  { background: var(--color-sky); color: #fff; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }
.section--dark p, .section--dark .lead { color: rgba(255,255,255,.78); }
.section--dark .eyebrow { color: var(--color-accent-hi); }

.grid { display: grid; gap: clamp(20px, 2.4vw, 32px); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .85rem 1.35rem;
  border-radius: 999px;
  font-weight: 600; font-size: .95rem;
  transition: all .25s var(--ease);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn--primary { background: var(--color-accent); color: #fff; box-shadow: 0 6px 20px -6px rgba(228,150,32,.55); }
.btn--primary:hover { background: var(--color-accent-deep); color: #fff; transform: translateY(-1px); }
.btn--ghost { border-color: currentColor; }
.btn--ghost:hover { background: var(--color-ink); color: #fff; border-color: var(--color-ink); }
.btn--light { background: #fff; color: var(--color-ink); }
.btn--light:hover { background: var(--color-accent); color: #fff; }
.btn--lg { padding: 1.05rem 1.75rem; font-size: 1rem; }

/* ---- Header ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(12px);
  background: rgba(250,247,241,.82);
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--color-line); background: rgba(250,247,241,.95); }
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0;
  gap: 1.5rem;
}
.brand { display: flex; align-items: center; gap: .7rem; font-family: var(--font-serif); font-size: 1.15rem; font-weight: 600; color: var(--color-ink); }
.brand__mark img, .brand__mark svg { width: 38px; height: 38px; border-radius: 8px; background: var(--color-ink); }
.brand__text { line-height: 1; }
.brand__text span { display: block; font-family: var(--font-sans); font-size: .7rem; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--color-muted); margin-top: 4px; }
.nav { display: flex; align-items: center; gap: 1.6rem; }
.nav a { font-size: .95rem; font-weight: 500; color: var(--color-ink-soft); position: relative; }
.nav a.is-active, .nav a:hover { color: var(--color-ink); }
.nav a.is-active::after {
  content:""; position:absolute; left: 0; right: 0; bottom: -8px;
  height: 2px; background: var(--color-accent); border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: .8rem; }
.lang-switch { display: inline-flex; align-items: center; gap: 4px; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--color-line); font-size: .82rem; color: var(--color-ink-soft); }
.lang-switch a { padding: 2px 8px; border-radius: 999px; }
.lang-switch a.is-active { background: var(--color-ink); color: #fff; }

.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--color-line); border-radius: 10px; align-items: center; justify-content: center; }
.nav-toggle span { position: relative; width: 18px; height: 2px; background: var(--color-ink); display: block; }
.nav-toggle span::before, .nav-toggle span::after { content:""; position: absolute; left: 0; right: 0; height: 2px; background: var(--color-ink); }
.nav-toggle span::before { top: -6px; } .nav-toggle span::after { top: 6px; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; top: 74px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    padding: 14px 20px 20px;
    transform: translateY(-200%);
    transition: transform .3s var(--ease);
  }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--color-line); }
  .nav a:last-child { border-bottom: 0; }
  body.nav-open .nav { transform: translateY(0); }
}

/* ---- Hero ---- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(80px, 10vw, 140px) 0 clamp(80px, 12vw, 160px);
  background: linear-gradient(180deg, #13284a 0%, #1f3f72 60%, #2a548f 100%);
  color: #fff;
  isolation: isolate;
}
.hero::before {
  content: ""; position: absolute; inset: -5% -10% auto auto;
  width: 60%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, #ffcf5e 0%, rgba(255,207,94,.5) 35%, transparent 70%);
  filter: blur(20px);
  opacity: .55;
  z-index: -1;
}
.hero::after {
  content: ""; position: absolute; inset: auto 0 -2px 0; height: 120px;
  background: linear-gradient(180deg, transparent, var(--color-bg));
  pointer-events: none;
}
.hero__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: clamp(30px, 5vw, 80px); align-items: center; }
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } }
.hero__eyebrow { color: var(--color-accent-hi); }
.hero h1 { color: #fff; margin-bottom: 1.2rem; }
.hero p  { color: rgba(255,255,255,.82); max-width: 52ch; font-size: 1.1rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.8rem; }
.hero__media {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #1f3f72, #0a1a35);
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255,255,255,.18);
}
.hero-stat {
  position: relative;
  padding: .25rem 1.25rem .25rem 0;
  min-width: 0;
}
.hero-stat + .hero-stat { border-left: 1px solid rgba(255,255,255,.14); padding-left: 1.5rem; }
.hero-stat__value {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.6vw, 3rem);
  line-height: 1.02;
  color: var(--color-accent-hi);
  font-weight: 500;
  letter-spacing: -.01em;
}
.hero-stat__value::after {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  margin-top: .7rem;
  background: var(--color-accent);
  border-radius: 2px;
  opacity: .9;
}
.hero-stat__label {
  display: block;
  margin-top: .65rem;
  color: rgba(255,255,255,.78);
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.35;
  text-transform: none;
}
@media (max-width: 640px) {
  .hero-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; }
  .hero-stat { padding-right: .5rem; }
  .hero-stat + .hero-stat { padding-left: .75rem; }
  .hero-stat__label { font-size: .72rem; }
}

/* ---- Value props ---- */
.feature {
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--r-lg);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.feature__icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #fff0d1, #ffd98e);
  color: var(--color-accent-deep);
  margin-bottom: 1.25rem;
}
.feature__icon svg { width: 26px; height: 26px; }
.feature h3 { margin-bottom: .4rem; font-size: 1.2rem; font-family: var(--font-sans); font-weight: 600; }
.feature p  { margin: 0; font-size: .95rem; }

/* ---- Services ---- */
.service {
  display: flex; flex-direction: column;
  padding: 2rem 2rem 2.2rem;
  background: var(--color-surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--color-line);
  position: relative; overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  min-height: 240px;
}
.service::before {
  content: ""; position: absolute; top: -60px; right: -60px;
  width: 150px; height: 150px; border-radius: 50%;
  background: radial-gradient(circle, rgba(228,150,32,.18), transparent 65%);
  transition: transform .5s var(--ease);
}
.service:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.service:hover::before { transform: scale(1.3); }
.service__num {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-accent-deep);
  font-weight: 600;
  margin-bottom: 1rem;
  opacity: .75;
}
.service h3 { font-family: var(--font-sans); font-weight: 600; font-size: 1.2rem; margin-bottom: .5rem; }
.service p  { margin: 0; font-size: .95rem; }

/* ---- Project cards ---- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 2vw, 28px); }
@media (max-width: 900px) { .projects-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .projects-grid { grid-template-columns: 1fr; } }

.project-card {
  display: flex; flex-direction: column;
  background: var(--color-surface);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.project-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.project-card__media {
  aspect-ratio: 4 / 3;
  background: var(--color-bg-alt);
  overflow: hidden;
  position: relative;
}
.project-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.project-card:hover .project-card__media img { transform: scale(1.05); }
.project-card__tag {
  position: absolute; top: 14px; left: 14px;
  padding: 5px 10px; font-size: .72rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  background: rgba(255,255,255,.95); color: var(--color-ink);
  border-radius: 999px;
}
.project-card__body { padding: 1.4rem 1.6rem 1.6rem; display: flex; flex-direction: column; flex: 1; }
.project-card__meta { font-size: .8rem; color: var(--color-muted); display: flex; gap: .8rem; margin-bottom: .55rem; }
.project-card__meta span { display: inline-flex; align-items: center; gap: 4px; }
.project-card h3 { font-family: var(--font-sans); font-weight: 600; font-size: 1.15rem; margin-bottom: .45rem; line-height: 1.3; }
.project-card p  { margin: 0; color: var(--color-ink-soft); font-size: .92rem; }
.project-card__link { margin-top: 1rem; font-size: .85rem; font-weight: 600; color: var(--color-accent-deep); letter-spacing: .02em; }

.empty-state { padding: 3rem 1.5rem; text-align: center; background: var(--color-surface); border-radius: var(--r-lg); border: 1px dashed var(--color-line); color: var(--color-muted); }

/* ---- Project detail ---- */
.project-hero {
  padding: clamp(60px, 8vw, 100px) 0 clamp(40px, 5vw, 60px);
  background: var(--color-bg-alt);
}
.project-meta-row { display: flex; flex-wrap: wrap; gap: 1.5rem 2.5rem; margin-top: 1.5rem; }
.project-meta-row dt { font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; color: var(--color-muted); margin-bottom: 2px; }
.project-meta-row dd { margin: 0; font-size: 1.05rem; color: var(--color-ink); font-weight: 600; }
.project-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 700px) { .project-gallery { grid-template-columns: repeat(2, 1fr); } }
.project-gallery img { aspect-ratio: 1; object-fit: cover; border-radius: var(--r); cursor: zoom-in; transition: transform .3s var(--ease); }
.project-gallery img:hover { transform: scale(1.02); }

/* ---- CTA banner ---- */
.cta {
  padding: clamp(60px, 8vw, 100px) 0;
  background: linear-gradient(135deg, #13284a, #1f3f72);
  color: #fff;
  position: relative; overflow: hidden;
}
.cta::before {
  content:""; position: absolute; right: -10%; top: -30%;
  width: 50vw; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(246,185,74,.4), transparent 70%);
  filter: blur(40px);
}
.cta__inner { position: relative; display: grid; grid-template-columns: 1.3fr 1fr; gap: 2rem; align-items: center; }
@media (max-width: 800px) { .cta__inner { grid-template-columns: 1fr; } }
.cta h2 { color: #fff; margin-bottom: .6rem; }
.cta p { color: rgba(255,255,255,.78); margin: 0; max-width: 52ch; }
.cta .btn { justify-self: start; }
@media (min-width: 801px) { .cta .btn { justify-self: end; } }

/* ---- Contact ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 4vw, 60px); }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card { background: var(--color-surface); border-radius: var(--r-lg); padding: 2rem; border: 1px solid var(--color-line); }
.contact-info { display: grid; gap: 1.2rem; }
.contact-info__item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-info__item .ico { width: 42px; height: 42px; border-radius: 12px; background: var(--color-bg-alt); color: var(--color-accent-deep); display: grid; place-items: center; flex-shrink: 0; }
.contact-info__item dt { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 2px; }
.contact-info__item dd { margin: 0; font-weight: 600; }

/* Form */
.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-size: .82rem; color: var(--color-ink-soft); margin-bottom: 6px; font-weight: 500; }
.form-control {
  width: 100%; padding: .85rem 1rem;
  background: var(--color-bg); border: 1px solid var(--color-line);
  border-radius: var(--r); font-size: .95rem;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.form-control:focus { outline: 0; border-color: var(--color-accent); background: #fff; box-shadow: 0 0 0 4px rgba(228,150,32,.12); }
textarea.form-control { min-height: 130px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-note { font-size: .82rem; color: var(--color-muted); }
.form-alert { padding: .9rem 1.1rem; border-radius: var(--r); margin-bottom: 1.2rem; font-size: .92rem; }
.form-alert--ok  { background: #e7f3ec; color: var(--color-ok); border: 1px solid #c5e2cf; }
.form-alert--err { background: #fbeaea; color: var(--color-danger); border: 1px solid #f0c9c9; }

/* Honeypot */
.hp-field { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* ---- Footer ---- */
.site-footer { background: #0b1525; color: rgba(255,255,255,.72); padding: 4rem 0 1.2rem; }
.site-footer h4 { color: #fff; font-family: var(--font-sans); font-size: 1rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 1.2rem; font-weight: 600; }
.site-footer a { color: rgba(255,255,255,.72); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 3rem; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: .6rem; font-size: .92rem; }
.footer-social { display: flex; gap: .7rem; margin-top: 1rem; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,.06); display: grid; place-items: center;
  transition: background .2s var(--ease);
}
.footer-social a:hover { background: var(--color-accent); color: #fff; }
.footer-bottom { padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.08); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; font-size: .82rem; color: rgba(255,255,255,.55); }
.footer-bottom a { color: inherit; }

/* ---- Reveal animation ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}

/* ---- Utilities ---- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mx-auto { margin-inline: auto; }
.hide-desktop { display: none; }
@media (max-width: 700px) { .hide-mobile { display: none; } .hide-desktop { display: block; } }

/* ---- Lightbox with prev/next navigation ---- */
.lightbox {
  position: fixed; inset: 0; z-index: 100;
  display: none; align-items: center; justify-content: center;
  background: rgba(10, 20, 35, .94);
  padding: 20px 60px;
}
.lightbox.is-open { display: flex; }
.lightbox__figure {
  margin: 0; max-width: 90vw; max-height: 90vh;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.lightbox__figure img {
  max-width: 100%; max-height: 82vh; border-radius: 12px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .5);
  object-fit: contain; background: #0a1423;
}
.lightbox__counter {
  color: rgba(255,255,255,.75); font-size: .9rem; letter-spacing: .04em;
}
.lightbox__close,
.lightbox__nav {
  position: absolute; background: rgba(255,255,255,.1);
  color: #fff; border: 0; cursor: pointer;
  display: grid; place-items: center;
  transition: background .2s, transform .2s;
}
.lightbox__close:hover,
.lightbox__nav:hover { background: rgba(255,255,255,.2); }
.lightbox__close {
  top: 20px; right: 24px;
  width: 44px; height: 44px; border-radius: 50%;
  font-size: 28px; line-height: 1;
}
.lightbox__nav {
  top: 50%; transform: translateY(-50%);
  width: 54px; height: 54px; border-radius: 50%;
}
.lightbox__nav:hover { transform: translateY(-50%) scale(1.08); }
.lightbox__nav--prev { left: 20px; }
.lightbox__nav--next { right: 20px; }
@media (max-width: 640px) {
  .lightbox { padding: 12px; }
  .lightbox__nav { width: 44px; height: 44px; }
  .lightbox__nav--prev { left: 8px; }
  .lightbox__nav--next { right: 8px; }
  .lightbox__close { top: 10px; right: 10px; width: 40px; height: 40px; font-size: 24px; }
}