/* ============================================================
   TJ PRIME — INTU / INTU+ site design system
   Dark premium theme + realistic CSS 3D product models
   ============================================================ */

@font-face {
  font-family: 'Tan Pearl';
  src: url('../fonts/tan-pearl.otf') format('opentype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --tj-bg: #0b1220;
  --tj-bg-2: #101a2e;
  --tj-card: #16233b;
  --tj-accent: #00ff88;
  --tj-accent-dark: #00c853;
  --tj-amber: #ffc107;
  --tj-text: #e8edf5;
  --tj-muted: #9db0c9;
}

html { scroll-behavior: smooth; }

body.tj-body {
  background:
    radial-gradient(1100px 500px at 80% -10%, rgba(0, 255, 136, 0.08), transparent 60%),
    radial-gradient(900px 500px at 0% 30%, rgba(40, 90, 200, 0.12), transparent 60%),
    linear-gradient(160deg, #0b1220 0%, #0e1729 45%, #0b1220 100%);
  color: var(--tj-text);
  font-family: 'Poppins', 'Roboto', sans-serif;
  padding-top: 76px;
}

/* ---------- Navbar ---------- */
.tj-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  background: rgba(9, 15, 28, 0.82);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tj-brand {
  font-family: 'Tan Pearl', 'Poppins', sans-serif;
  font-size: 26px;
  letter-spacing: 5px;
  text-transform: uppercase;
  background: linear-gradient(90deg, #ffffff, var(--tj-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

.tj-nav .nav-link {
  color: var(--tj-muted);
  font-size: 14px;
  font-weight: 500;
}

.tj-nav .nav-link:hover,
.tj-nav .nav-link.active { color: var(--tj-accent); }

/* ---------- Sections ---------- */
.tj-section { padding: 72px 0; }
.tj-section--alt { background: rgba(255, 255, 255, 0.025); border-block: 1px solid rgba(255, 255, 255, 0.05); }

.tj-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--tj-accent);
  border: 1px solid rgba(0, 255, 136, 0.35);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 16px;
}

.tj-h { font-weight: 700; color: #fff; }
.tj-lead { color: var(--tj-muted); max-width: 720px; margin-inline: auto; }

/* ---------- Cards ---------- */
.tj-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 28px;
  height: 100%;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.tj-card:hover { transform: translateY(-4px); border-color: rgba(0, 255, 136, 0.35); }
.tj-card .bi { font-size: 34px; color: var(--tj-accent); }
.tj-card h5 { color: #fff; margin-top: 14px; }
.tj-card p { color: var(--tj-muted); font-size: 14px; margin: 0; }

/* ---------- Buttons ---------- */
.btn-tj {
  background: linear-gradient(90deg, var(--tj-accent-dark), var(--tj-accent));
  color: #04220f;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  padding: 13px 30px;
  box-shadow: 0 8px 24px rgba(0, 255, 136, 0.25);
}

.btn-tj:hover { color: #04220f; filter: brightness(1.08); }

.btn-tj-outline {
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff;
  border-radius: 12px;
  padding: 13px 30px;
  font-weight: 600;
}

.btn-tj-outline:hover { border-color: var(--tj-accent); color: var(--tj-accent); }

/* ---------- Stats strip ---------- */
.tj-stat { text-align: center; }
.tj-stat b { display: block; font-size: 30px; color: var(--tj-accent); font-weight: 800; }
.tj-stat span { color: var(--tj-muted); font-size: 13px; }

/* ---------- Spec table ---------- */
.tj-spec { width: 100%; font-size: 14px; border-collapse: collapse; }
.tj-spec th, .tj-spec td { padding: 9px 12px; border-bottom: 1px solid rgba(255, 255, 255, 0.07); vertical-align: top; }
.tj-spec th { color: var(--tj-muted); font-weight: 500; width: 46%; text-align: left; }
.tj-spec td { color: #fff; font-weight: 600; }
.tj-spec tr:last-child th, .tj-spec tr:last-child td { border-bottom: none; }

/* ============================================================
   REALISTIC 3D PRODUCT MODEL (pure CSS, drag to rotate)
   Geometry: --w (width X), --h (height Y), --d (depth Z)
   ============================================================ */
.m3d-scene {
  --w: 320px;
  --h: 96px;
  --d: 258px;
  position: relative;
  height: 330px;
  display: grid;
  place-items: center;
  perspective: 1200px;
  touch-action: pan-y;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}

.m3d-scene:active { cursor: grabbing; }

.m3d {
  position: relative;
  width: var(--w);
  height: var(--h);
  transform-style: preserve-3d;
  transform: rotateX(-18deg) rotateY(-28deg);
  will-change: transform;
}

.m3d-face {
  position: absolute;
  top: 0;
  left: 0;
  border-radius: 14px;
  backface-visibility: hidden;
}

/* Front & back — black glass fascia in white rim */
.m3d-front, .m3d-back {
  width: var(--w);
  height: var(--h);
}

.m3d-front {
  transform: translateZ(calc(var(--d) / 2));
  background: linear-gradient(115deg, #2a2d31 0%, #101214 38%, #17191c 70%, #26292d 100%);
  border: 5px solid #eef1f4;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* glass reflection sweep */
.m3d-front::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 30%, rgba(255, 255, 255, 0.10) 45%, transparent 60%);
}

.m3d-back {
  transform: rotateY(180deg) translateZ(calc(var(--d) / 2));
  background: linear-gradient(180deg, #d9dde2, #c9ced4);
}

/* Sides */
.m3d-left, .m3d-right {
  width: var(--d);
  height: var(--h);
  left: calc((var(--w) - var(--d)) / 2);
}

.m3d-left {
  transform: rotateY(-90deg) translateZ(calc(var(--w) / 2));
  background: linear-gradient(180deg, #e3e6ea, #d2d6db);
}

.m3d-right {
  transform: rotateY(90deg) translateZ(calc(var(--w) / 2));
  background: linear-gradient(180deg, #f2f4f6, #e2e5e9);
}

/* perforated cooling vent on the right side (as on the product) */
.m3d-vent {
  position: absolute;
  top: 22%;
  left: 14%;
  width: 56%;
  height: 56%;
  border-radius: 8px;
  background-image: radial-gradient(circle, #969ca4 1.1px, transparent 1.6px);
  background-size: 7px 7px;
}

/* Top & bottom */
.m3d-top, .m3d-bottom {
  width: var(--w);
  height: var(--d);
  top: calc((var(--h) - var(--d)) / 2);
}

.m3d-top {
  transform: rotateX(90deg) translateZ(calc(var(--h) / 2));
  background: linear-gradient(160deg, #fdfdfe 0%, #f0f2f4 55%, #e6e9ec 100%);
}

/* recessed slot near the back edge of the top face */
.m3d-groove {
  position: absolute;
  top: 8%;
  right: 10%;
  width: 34%;
  height: 5%;
  border-radius: 999px;
  background: linear-gradient(180deg, #7c828a, #a7adb5);
  box-shadow: inset 0 2px 3px rgba(0, 0, 0, 0.35);
}

.m3d-bottom {
  transform: rotateX(-90deg) translateZ(calc(var(--h) / 2));
  background: #c2c7cd;
}

/* Wordmark on the fascia */
.m3d-logo {
  position: relative;
  z-index: 1;
  color: #fff;
  font-weight: 700;
  font-size: calc(var(--h) * 0.30);
  letter-spacing: 0.38em;
  padding-left: 0.38em; /* optically recentre the tracked text */
  font-family: 'Poppins', sans-serif;
}

.m3d-logo sup { font-size: 0.35em; letter-spacing: 0; }
.m3d-logo .m3d-plus { color: var(--tj-accent); letter-spacing: 0; }
.m3d-logo .m3d-sub { color: var(--tj-accent); font-size: 0.52em; letter-spacing: 0.18em; margin-left: 0.45em; }

/* Floor shadow */
.m3d-shadow {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(var(--w) * 0.92);
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.5), transparent 68%);
  filter: blur(7px);
  pointer-events: none;
}

.m3d-hint {
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  color: var(--tj-muted);
  pointer-events: none;
}

/* Compact model used in product cards */
.m3d-scene--card { --w: 240px; --h: 72px; --d: 194px; height: 240px; }

/* Tower variant — wall-mount inverters / all-in-one units */
.m3d-scene--tower { --w: 158px; --h: 236px; --d: 92px; height: 300px; }

.m3d-scene--tower .m3d-front {
  background: linear-gradient(160deg, #fdfdfe 0%, #eef1f4 55%, #e2e6ea 100%);
  border: none;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 12%;
}

.m3d-scene--tower .m3d-front::after { background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, 0.35) 48%, transparent 62%); }

.m3d-scene--tower .m3d-logo {
  color: #22262b;
  font-size: 15px;
  letter-spacing: 0.22em;
  padding-left: 0.22em;
}

/* dark status display near the top of the fascia */
.m3d-screen {
  position: absolute;
  top: 9%;
  left: 17%;
  width: 66%;
  height: 24%;
  border-radius: 9px;
  background: linear-gradient(140deg, #10141b, #1c2530);
  box-shadow: inset 0 0 14px rgba(0, 255, 136, 0.14);
  z-index: 1;
}

.m3d-screen::after {
  content: '';
  position: absolute;
  right: 10px;
  bottom: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--tj-accent);
  box-shadow: 0 0 8px var(--tj-accent);
}

.m3d-scene--tower .m3d-shadow { width: calc(var(--w) * 1.3); }

/* product viewer — switch between 3D model and official photo */
.pv-photo {
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 16px;
  padding: 10px;
  overflow: hidden; /* photo must never spill over the specs below */
}

.pv-photo img {
  max-width: 100%;
  max-height: 220px;
  width: auto;
  height: auto;
  object-fit: contain;
}

.pv-toggle { display: flex; justify-content: center; gap: 6px; margin: 10px 0 14px; }

.pv-toggle button {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: var(--tj-muted);
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 16px;
  transition: 0.2s;
}

.pv-toggle button.active {
  border-color: var(--tj-accent);
  color: var(--tj-accent);
  background: rgba(0, 255, 136, 0.08);
}

@media (max-width: 768px) {
  .pv-photo { height: 210px; }
  .pv-photo img { max-height: 190px; }
}

/* application tag pills on product cards */
.tj-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--tj-accent);
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.25);
  border-radius: 999px;
  padding: 3px 12px;
  margin: 2px;
}

/* capacity badge */
.tj-cap {
  display: inline-block;
  font-weight: 800;
  color: #04220f;
  background: linear-gradient(90deg, var(--tj-accent-dark), var(--tj-accent));
  border-radius: 999px;
  padding: 4px 16px;
  font-size: 14px;
}

/* feature checklist on inverter cards */
.tj-feats { list-style: none; padding: 0; margin: 0; }
.tj-feats li { color: var(--tj-muted); font-size: 14px; padding: 5px 0 5px 26px; position: relative; }
.tj-feats li::before {
  content: '✔';
  position: absolute;
  left: 0;
  color: var(--tj-accent);
  font-size: 13px;
}

/* Mini static model used in calculator results */
.m3d-scene--mini {
  --w: 118px;
  --h: 38px;
  --d: 96px;
  height: 128px;
  perspective: 700px;
  cursor: default;
}

.m3d-scene--mini .m3d { transform: rotateX(-20deg) rotateY(-32deg); }
.m3d-scene--mini .m3d-face { border-radius: 7px; }
.m3d-scene--mini .m3d-front { border-width: 2px; }
.m3d-scene--mini .m3d-logo { font-size: 11px; letter-spacing: 0.2em; padding-left: 0.2em; }
.m3d-scene--mini .m3d-shadow { bottom: 6px; height: 14px; filter: blur(4px); }

/* charge indicator strip on mini model fascia */
.m3d-charge {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 16%;
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
  z-index: 1;
}

.m3d-charge > i {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--tj-accent-dark), var(--tj-accent));
  transition: width 0.8s ease;
}

/* requested energy exceeds this battery's capacity */
.m3d-charge.over > i { background: linear-gradient(90deg, #ff8a65, #ff5252); }

.m3d-unit { text-align: center; }
.m3d-unit small { color: var(--tj-muted); display: block; margin-top: 2px; }

@media (max-width: 768px) {
  body.tj-body { padding-top: 66px; }
  .tj-section { padding: 48px 0; }
  .m3d-scene { --w: 240px; --h: 74px; --d: 196px; height: 250px; }
  .m3d-scene--card { --w: 210px; --h: 64px; --d: 170px; height: 210px; }
  .m3d-scene--tower { --w: 132px; --h: 198px; --d: 78px; height: 256px; }
  .m3d-scene--mini { --w: 96px; --h: 32px; --d: 78px; height: 106px; }
  .tj-brand { font-size: 20px; letter-spacing: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  .tj-card, .m3d-charge > i { transition: none; }
}

/* ============================================================
   CALCULATOR
   ============================================================ */
.calc-card {
  background: #ffffff;
  color: #111;
  border-radius: 24px;
  padding: 34px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
}

/* model switch */
.calc-switch { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

.calc-switch .calc-model {
  border: 2px solid #d8dde3;
  background: #f6f8fa;
  color: #111;
  border-radius: 16px;
  padding: 12px 26px;
  font-weight: 700;
  transition: 0.2s;
}

.calc-switch .calc-model small { display: block; font-weight: 500; font-size: 12px; color: #667085; }

.calc-switch .calc-model.active {
  border-color: var(--tj-accent-dark);
  background: #eafff4;
  box-shadow: 0 6px 18px rgba(0, 200, 83, 0.18);
}

.calc-switch .calc-model.active small { color: var(--tj-accent-dark); }

/* appliance tiles */
.appliance {
  border-radius: 18px;
  padding: 18px 12px;
  text-align: center;
  background: #f6f8fa;
  border: 1px solid #eceff3;
  height: 100%;
  transition: 0.25s;
}

.appliance:hover { transform: translateY(-4px); box-shadow: 0 10px 22px rgba(0, 0, 0, 0.12); }
.appliance p { margin: 6px 0 10px; font-weight: 600; font-size: 14px; }
.appliance .watts { display: block; font-weight: 400; font-size: 12px; color: #667085; }

.app-icon { font-size: 40px; display: inline-block; color: #3d4653; }

.counter-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  white-space: nowrap;
}

.counter-btn {
  background: #111;
  color: #fff;
  border: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 16px;
  line-height: 1;
}

.counter-btn:disabled { opacity: 0.35; }

/* appliance "on" animations */
.spin { animation: m3dspin var(--speed, 1s) linear infinite; }
@keyframes m3dspin { to { transform: rotate(360deg); } }

.glow-warm {
  color: #ffb300;
  filter: drop-shadow(0 0 5px rgba(255, 200, 80, 0.7)) drop-shadow(0 0 14px rgba(255, 200, 80, 0.4));
  animation: warmPulse 2.6s ease-in-out infinite alternate;
}

@keyframes warmPulse {
  from { opacity: 0.85; }
  to { opacity: 1; }
}

.glow-green {
  color: var(--tj-accent-dark);
  filter: drop-shadow(0 0 6px rgba(0, 200, 83, 0.6));
  animation: warmPulse 2s ease-in-out infinite alternate;
}

.pop { animation: popIn 0.3s ease; }
@keyframes popIn { 50% { transform: scale(1.18); } }

/* result panel */
.calc-result {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  border-radius: 22px;
  padding: 34px;
  margin-top: 28px;
  color: #fff;
}

.calc-result h2 { font-size: 24px; font-weight: 800; text-align: center; }
.calc-result .metric { font-size: 19px; font-weight: 700; text-align: center; margin: 6px 0; }
.calc-duration { font-size: 22px; font-weight: 800; color: var(--tj-accent); text-align: center; }
.calc-units-note { text-align: center; color: #b9c6da; font-size: 14px; margin-top: 4px; }

.calc-stack { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 18px; }

/* SEO content blocks on calculator page */
.calc-content h2 { font-size: 24px; }
.calc-content h3 { font-size: 18px; }
.calc-content p, .calc-content li { color: var(--tj-muted); }
.calc-content .table { --bs-table-bg: transparent; color: var(--tj-text); }
.calc-content .table td, .calc-content .table th { border-color: rgba(255, 255, 255, 0.1); }

.faq-item { border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; float: right; color: var(--tj-accent); font-weight: 700; }
.faq-item[open] summary::after { content: '–'; }
.faq-item .faq-body { padding: 0 20px 16px; color: var(--tj-muted); font-size: 14px; }

@media (max-width: 768px) {
  .calc-card { padding: 20px 16px; border-radius: 18px; }
  .calc-result { padding: 22px 16px; }
  .calc-result h2 { font-size: 18px; }
  .calc-result .metric { font-size: 15px; }
  .calc-duration { font-size: 17px; }
  .app-icon { font-size: 30px; }
}