/* =========================================================
   PT Satu Dua Tiga Sayang Semuanya - Stylesheet bersama
   Isi: 1.Variabel 2.Dasar 3.Navbar 4.Tombol 5.Hero 6.Section
        7.Carousel 8.Form 9.Footer 10.Animasi 11.Responsif
   ========================================================= */

/* 1. VARIABEL WARNA - ubah di sini untuk mengganti tema */
:root {
  --mint: #b2edc0;        /* warna utama (aksen / latar lembut) */
  --mint-soft: #eaf9ee;   /* mint sangat muda untuk latar section */
  --forest: #0f3d2e;      /* hijau tua: teks judul & tombol (kontras tinggi) */
  --ink: #1b2a23;         /* teks isi */
  --muted: #5d6e65;       /* teks sekunder */
  --bg: #fbfefc;          /* latar halaman */
  --line: #dbeee1;        /* garis tipis */
  --radius: 18px;
}

/* 2. DASAR */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
       color: var(--ink); background: var(--bg); line-height: 1.7; }
h1, h2, h3 { font-family: "Playfair Display", Georgia, serif; color: var(--forest);
             line-height: 1.2; margin: 0 0 .6em; font-weight: 600; }
h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
p { margin: 0 0 1em; color: var(--muted); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, 92%); margin-inline: auto; }
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section.alt { background: var(--mint-soft); }
.eyebrow { display: inline-block; font-size: .78rem; letter-spacing: .18em; text-transform: uppercase;
           color: var(--forest); background: var(--mint); padding: .3em .9em; border-radius: 99px; margin-bottom: 1rem; }

/* 3. NAVBAR */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(251,254,252,.88);
               backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.brand { display: flex; align-items: center; gap: .6rem; font-family: "Playfair Display", serif;
         font-weight: 600; color: var(--forest); }
.menu { display: flex; gap: 1.8rem; }
.menu a { font-size: .95rem; color: var(--muted); padding: .3rem 0; border-bottom: 2px solid transparent; transition: .2s; }
.menu a:hover, .menu a.active { color: var(--forest); border-color: var(--mint); }
.nav-toggle { display: none; background: none; border: 0; font-size: 1.6rem; color: var(--forest); cursor: pointer; }

/* 4. TOMBOL */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .85em 1.6em; border-radius: 99px;
       font-weight: 600; font-size: .95rem; border: 2px solid var(--forest); cursor: pointer;
       transition: transform .2s, background .2s, color .2s; font-family: inherit; }
.btn-primary { background: var(--forest); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); background: #0a2b20; }
.btn-ghost { background: transparent; color: var(--forest); }
.btn-ghost:hover { background: var(--mint); transform: translateY(-2px); }
.btn-wa { background: #1faa59; border-color: #1faa59; color: #fff; }
.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.4rem; }

/* 5. HERO (halaman utama) */
.hero { background: radial-gradient(circle at 80% 20%, var(--mint) 0, transparent 55%), var(--bg); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 3rem; align-items: center; min-height: 82vh; }
.hero-art svg { width: 100%; height: auto; max-height: 460px; }
.page-hero { padding: 4rem 0 2.5rem; background: linear-gradient(180deg, var(--mint-soft), var(--bg)); }

/* 6. SECTION: grid kartu, statistik, dll */
.grid { display: grid; gap: 1.4rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); gap: 3rem; align-items: center; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem;
        transition: transform .3s, box-shadow .3s; }
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px -22px rgba(15,61,46,.45); }
.icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 14px;
        background: var(--mint); font-size: 1.5rem; margin-bottom: 1rem; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; text-align: center; }
.stats strong { display: block; font-family: "Playfair Display", serif; font-size: 2.4rem; color: var(--forest); }
.about-visual { aspect-ratio: 4/3; border-radius: var(--radius); display: grid; place-items: center;
                background: url("../images/about.jpg") center/cover, linear-gradient(135deg, var(--mint), #6fcf8d); }
.cta { background: var(--forest); border-radius: 28px; padding: clamp(2rem, 6vw, 4rem); text-align: center; }
.cta h2 { color: #fff; } .cta p { color: #cfe9d8; }
.cta .btn-primary { background: var(--mint); color: var(--forest); border-color: var(--mint); }

/* 7. CAROUSEL PROJECT (scroll-snap, bisa digeser / tombol panah) */
.carousel { position: relative; }
.track { display: flex; gap: 1.4rem; overflow-x: auto; scroll-snap-type: x mandatory;
         scrollbar-width: none; padding: .5rem .2rem 1.2rem; }
.track::-webkit-scrollbar { display: none; }
.project { flex: 0 0 min(340px, 84%); scroll-snap-align: start; padding: 0; overflow: hidden; }
.project .media { aspect-ratio: 4/3; background-size: cover; background-position: center; }
.project .body { padding: 1.3rem 1.5rem 1.6rem; }
.tag { font-size: .75rem; background: var(--mint); color: var(--forest); padding: .2em .8em; border-radius: 99px; }
.carousel-nav { display: flex; gap: .6rem; justify-content: flex-end; margin-bottom: 1rem; }
.carousel-nav button { width: 46px; height: 46px; border-radius: 50%; border: 2px solid var(--forest);
                       background: #fff; color: var(--forest); font-size: 1.1rem; cursor: pointer; transition: .2s; }
.carousel-nav button:hover { background: var(--mint); }

/* 8. FORM KONTAK */
.form { display: grid; gap: 1rem; }
.form label { font-size: .85rem; font-weight: 600; color: var(--forest); display: grid; gap: .35rem; }
.form input, .form textarea { font: inherit; padding: .85em 1em; border: 1.5px solid var(--line);
                              border-radius: 12px; background: #fff; transition: border .2s, box-shadow .2s; }
.form input:focus, .form textarea:focus { outline: 0; border-color: var(--forest); box-shadow: 0 0 0 4px var(--mint); }
.info-list { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: .9rem; }
.info-list li { display: flex; gap: .8rem; color: var(--muted); }

/* 9. FOOTER */
.site-footer { background: var(--forest); color: #cfe9d8; padding: 2.5rem 0; text-align: center; font-size: .9rem; }
.site-footer a { color: var(--mint); }

/* 10. ANIMASI */
/* -- Hero SVG: kipas HVAC berputar, pipa & kabel listrik mengalir, titik berdenyut -- */
.spin { transform-origin: 200px 200px; animation: spin 6s linear infinite; }
.flow-pipe { stroke-dasharray: 14 10; animation: flow 1.6s linear infinite; }
.flow-wire { stroke-dasharray: 6 12; animation: flow 1s linear infinite reverse; }
.pulse { transform-box: fill-box; transform-origin: center; animation: pulse 2.4s ease-in-out infinite; }
.float { animation: float 5s ease-in-out infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes flow { to { stroke-dashoffset: -48; } }
@keyframes pulse { 50% { transform: scale(1.5); opacity: .5; } }
@keyframes float { 50% { transform: translateY(-10px); } }
/* -- Muncul halus saat di-scroll (kelas .in ditambahkan oleh main.js) -- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s, transform .8s; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } .reveal { opacity: 1; transform: none; } }

/* 11. RESPONSIF */
@media (max-width: 860px) {
  .hero-grid, .grid-2 { grid-template-columns: 1fr; min-height: auto; padding: 2.5rem 0; }
  .hero-art { order: -1; max-width: 340px; margin-inline: auto; }
  .grid-3 { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .menu { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0;
          background: var(--bg); border-bottom: 1px solid var(--line); padding: .5rem 4%; }
  .menu.open { display: flex; }
  .menu a { padding: .9rem 0; }
}