/* ==============================================
   ALTA Energy Group — Website Styles (v1)
   Author: ALTA ENERGY (draft)
   ============================================== */

:root{
  --bg-0: #061617;
  --bg-1: #072124;
  --bg-2: #0B2E33;
  --card: rgba(255,255,255,0.06);
  --card-2: rgba(255,255,255,0.10);
  --stroke: rgba(255,255,255,0.12);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.70);
  --muted-2: rgba(255,255,255,0.55);
  --accent: #00D6E6;
  --accent-2: #7FF3FF;
  --gold: #FFB000;
  --shadow: 0 18px 48px rgba(0,0,0,0.45);
  --radius: 18px;
  --radius-lg: 26px;
  --max: 1180px;
}

*{ box-sizing:border-box; }
html, body{ margin:0; padding:0; background: radial-gradient(1200px 700px at 20% 0%, rgba(0,214,230,0.18) 0%, rgba(0,214,230,0.00) 55%), radial-gradient(1200px 700px at 80% 20%, rgba(255,176,0,0.12) 0%, rgba(255,176,0,0.00) 55%), linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 45%, var(--bg-0) 100%); color:var(--text); font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif; }
a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
.container{ width:min(var(--max), calc(100% - 44px)); margin:0 auto; }

.badge{
  display:inline-flex; align-items:center; gap:10px;
  padding:10px 14px; border:1px solid var(--stroke);
  border-radius:999px; background:rgba(255,255,255,0.04);
  color:var(--muted); font-size:14px;
  backdrop-filter: blur(10px);
}
.badge .dot{
  width:8px; height:8px; border-radius:999px;
  background: var(--accent); box-shadow: 0 0 0 6px rgba(0,214,230,0.15);
}

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:12px 16px; border-radius:14px;
  border:1px solid var(--stroke); cursor:pointer;
  background:rgba(255,255,255,0.06);
  color:var(--text);
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  user-select:none;
}
.btn:hover{ transform: translateY(-1px); background:rgba(255,255,255,0.09); border-color: rgba(255,255,255,0.20); }
.btn.primary{
  background: linear-gradient(135deg, rgba(0,214,230,0.95) 0%, rgba(0,214,230,0.65) 55%, rgba(127,243,255,0.65) 100%);
  color: #001113;
  border-color: rgba(0,214,230,0.55);
  box-shadow: 0 18px 40px rgba(0,214,230,0.18);
}
.btn.primary:hover{ background: linear-gradient(135deg, rgba(0,214,230,1) 0%, rgba(127,243,255,0.70) 100%); }
.btn.ghost{ background:transparent; }

.header{
  position:sticky; top:0; z-index:50;
  background: linear-gradient(180deg, rgba(6,22,23,0.85) 0%, rgba(6,22,23,0.55) 100%);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 0;
}
.brand{
  display:flex; align-items:center; gap:12px;
}
.brand img{
  width:40px; height:40px; border-radius:12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.25);
}
.brand .name{
  display:flex; flex-direction:column; line-height:1.05;
}
.brand .name strong{ font-size:14px; letter-spacing:0.12em; text-transform:uppercase; }
.brand .name span{ font-size:12px; color:var(--muted); letter-spacing:0.08em; text-transform:uppercase; }

.nav{
  display:flex; align-items:center; gap:18px;
}
.nav a{
  font-size:14px; color:var(--muted);
  padding:10px 10px; border-radius:12px;
  transition: background .15s ease, color .15s ease;
}
.nav a:hover{ background: rgba(255,255,255,0.06); color:var(--text); }
.nav a.active{ background: rgba(0,214,230,0.10); color: var(--text); border:1px solid rgba(0,214,230,0.25); }

.nav-cta{ display:flex; align-items:center; gap:10px; }

.mobile-toggle{
  display:none; width:44px; height:44px;
  border-radius:14px; border:1px solid var(--stroke);
  background: rgba(255,255,255,0.04);
}
.mobile-toggle svg{ width:22px; height:22px; }

@media (max-width: 940px){
  .nav{ display:none; position:absolute; left:22px; right:22px; top:76px; flex-direction:column; align-items:stretch; gap:6px; padding:12px; border-radius: var(--radius); border:1px solid rgba(255,255,255,0.10); background: rgba(6,22,23,0.92); box-shadow: var(--shadow); }
  .nav a{ padding:12px 12px; }
  .nav-cta{ width:100%; }
  .nav-cta .btn{ width:100%; }
  .mobile-toggle{ display:inline-flex; align-items:center; justify-content:center; }
  .nav.open{ display:flex; }
}

.hero{
  padding: 64px 0 26px 0;
}
.hero-grid{
  display:grid; grid-template-columns: 1.15fr 0.85fr; gap:28px; align-items:stretch;
}
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
}

.hero-card{
  position:relative;
  border-radius: var(--radius-lg);
  overflow:hidden;
  border:1px solid rgba(255,255,255,0.10);
  box-shadow: var(--shadow);
}
.hero-card .bg{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(6,22,23,0.92) 0%, rgba(6,22,23,0.62) 40%, rgba(6,22,23,0.25) 100%),
    url('../img/hero_alta_solar.png');
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}
.hero-card .content{
  position:relative;
  padding: 44px 44px 44px 44px;
}
@media (max-width: 560px){
  .hero-card .content{ padding: 34px 22px; }
}

.h1{
  font-size: 46px; line-height:1.05; letter-spacing:-0.02em;
  margin: 16px 0 14px 0;
}
@media (max-width: 560px){
  .h1{ font-size: 36px; }
}
.p{
  font-size: 16px; line-height:1.6;
  color: var(--muted);
  margin: 0 0 20px 0;
  max-width: 58ch;
}
.hero-actions{
  display:flex; gap:12px; flex-wrap:wrap;
  margin-top: 18px;
}

.side-panel{
  border-radius: var(--radius-lg);
  border:1px solid rgba(255,255,255,0.10);
  background: linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.04) 100%);
  box-shadow: var(--shadow);
  padding: 28px;
}
.side-panel h3{ margin:0 0 10px 0; font-size: 16px; letter-spacing:0.08em; text-transform:uppercase; color: var(--muted); }
.kpis{ display:grid; grid-template-columns: 1fr 1fr; gap:14px; margin-top: 14px; }
.kpi{
  padding: 14px;
  border-radius: 16px;
  background: rgba(6,22,23,0.55);
  border: 1px solid rgba(255,255,255,0.10);
}
.kpi strong{ display:block; font-size: 18px; }
.kpi span{ display:block; margin-top:6px; font-size: 12px; letter-spacing:0.08em; text-transform:uppercase; color: var(--muted-2); }

.section{ padding: 48px 0; }
.section-title{
  display:flex; align-items:flex-end; justify-content:space-between; gap:24px;
  margin-bottom: 20px;
}
.section-title h2{
  margin:0; font-size: 24px; letter-spacing:-0.01em;
}
.section-title p{
  margin:0; color: var(--muted); max-width: 55ch;
  line-height:1.6; font-size: 14px;
}
.grid-3{
  display:grid; grid-template-columns: repeat(3, 1fr); gap:16px;
}
@media (max-width: 980px){
  .grid-3{ grid-template-columns: 1fr; }
}

.card{
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.05);
  padding: 18px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}
.card h4{
  margin: 10px 0 8px 0; font-size: 16px;
}
.card p{
  margin: 0; color: var(--muted); font-size: 14px; line-height:1.6;
}
.icon{
  width:42px; height:42px; border-radius: 14px;
  display:flex; align-items:center; justify-content:center;
  background: rgba(0,214,230,0.10);
  border: 1px solid rgba(0,214,230,0.25);
}
.icon svg{ width:22px; height:22px; }

.hr{
  height:1px; background: rgba(255,255,255,0.10);
  margin: 26px 0;
}

.split{
  display:grid; grid-template-columns: 0.95fr 1.05fr; gap:18px; align-items:center;
}
@media (max-width: 980px){
  .split{ grid-template-columns: 1fr; }
}
.figure{
  border-radius: var(--radius-lg);
  border:1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
  overflow:hidden;
  box-shadow: var(--shadow);
}
.figure img{ width:100%; height:auto; }
.figure .cap{
  padding: 12px 14px;
  font-size: 12px;
  color: var(--muted-2);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.timeline{
  display:grid;
  gap:12px;
}
.step{
  display:grid;
  grid-template-columns: 140px 1fr;
  gap:14px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.10);
}
.step .tag{
  font-size:12px; letter-spacing:0.12em; text-transform:uppercase;
  color: var(--accent-2);
}
.step strong{
  font-size: 16px;
}
.step p{
  margin: 6px 0 0 0;
  color: var(--muted);
  line-height:1.6;
  font-size: 14px;
}

.footer{
  padding: 34px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(6,22,23,0.20) 0%, rgba(6,22,23,0.65) 100%);
}
.footer-grid{
  display:grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap:18px;
}
@media (max-width: 980px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px){
  .footer-grid{ grid-template-columns: 1fr; }
}
.footer h5{ margin:0 0 10px 0; font-size: 12px; letter-spacing:0.12em; text-transform:uppercase; color: var(--muted); }
.footer a, .footer p{ color: var(--muted); font-size: 13px; line-height:1.6; }
.footer a:hover{ color: var(--text); }
.copy{
  margin-top: 18px;
  color: var(--muted-2);
  font-size: 12px;
  display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap;
}

/* page header */
.page-hero{
  padding: 44px 0 10px;
}
.page-hero h1{ margin: 12px 0 10px 0; font-size: 34px; letter-spacing:-0.02em; }
.page-hero p{ margin:0; color: var(--muted); line-height:1.6; max-width: 70ch; }

/* forms */
.form{
  display:grid; gap:12px;
}
.field{
  display:grid; gap:8px;
}
label{ font-size: 13px; color: var(--muted); }
input, textarea, select{
  width:100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  outline: none;
}
textarea{ min-height: 120px; resize: vertical; }
input:focus, textarea:focus, select:focus{ border-color: rgba(0,214,230,0.45); box-shadow: 0 0 0 4px rgba(0,214,230,0.12); }
.notice{
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}
.small{
  font-size: 12px;
  color: var(--muted-2);
}

/* simple reveal animation */
.reveal{
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .55s ease, transform .55s ease;
}
.reveal.on{
  opacity: 1;
  transform: translateY(0);
}


/* Language switcher */
.lang-switch{
  display:flex; align-items:center; gap:8px;
  padding:6px;
  border:1px solid rgba(255,255,255,0.12);
  border-radius:999px;
  background: rgba(255,255,255,0.04);
}
.lang-link{
  width:32px; height:32px;
  display:flex; align-items:center; justify-content:center;
  border-radius:999px;
  border:1px solid transparent;
  font-size:18px; line-height:1;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.lang-link:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.18);
}
.lang-link.active{
  background: rgba(0,214,230,0.10);
  border-color: rgba(0,214,230,0.35);
}
@media (max-width: 940px){
  .lang-switch{ justify-content:center; margin: 6px 0 8px 0; }
}