/* ==========================================================================
   Mettlemind Tech Ltd — base theme (dark navy + teal/cyan)
   ========================================================================== */

:root {
  --bg: #0a1628;
  --bg-alt: #0f2138;
  --surface: #142c47;
  --surface-2: #1a3654;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8f1fb;
  --text-muted: #93a8c2;
  --accent: #2dd4bf;
  --accent-2: #22d3ee;
  --accent-contrast: #04141f;
  --warn: #f59e0b;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --max-width: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; margin: 0; padding: 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 12px; }

section { padding: 64px 0; }

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-head p {
  color: var(--text-muted);
  margin: 0;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-contrast);
  box-shadow: 0 8px 20px rgba(45, 212, 191, 0.25);
}

.btn-primary:hover { box-shadow: 0 10px 26px rgba(45, 212, 191, 0.4); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

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

.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.02em;
}

.brand-logo {
  height: 34px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* ---------- Hero ---------- */

.hero {
  padding: 88px 0 64px;
  background:
    radial-gradient(circle at 15% 20%, rgba(45, 212, 191, 0.12), transparent 45%),
    radial-gradient(circle at 85% 0%, rgba(34, 211, 238, 0.10), transparent 40%);
  text-align: center;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  max-width: 820px;
  margin: 0 auto 18px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  max-width: 620px;
  margin: 0 auto 32px;
  color: var(--text-muted);
  font-size: 17px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.trust-row {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-top: 56px;
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.trust-row strong {
  display: block;
  color: var(--text);
  font-size: 22px;
}

/* ---------- Cards grid ---------- */

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}

.grid-single {
  grid-template-columns: minmax(0, 380px);
  justify-content: center;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 212, 191, 0.4);
}

.rank-badge {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stars { color: var(--accent); font-size: 14px; letter-spacing: 2px; }

.card h3 { font-size: 18px; }

.card p { color: var(--text-muted); font-size: 14px; margin: 0; }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}

.bonus-value { font-weight: 800; color: var(--accent); font-size: 15px; }
.bonus-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; }

/* ---------- Table ---------- */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  background: var(--surface);
}

th, td {
  text-align: left;
  padding: 16px 20px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.05em;
  background: var(--bg-alt);
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }

/* ---------- Filters (platforms page) ---------- */

.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.chip {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.chip.active,
.chip:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Blog ---------- */

.blog-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(3, 1fr);
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.post-thumb {
  height: 150px;
  background: linear-gradient(135deg, var(--surface-2), var(--bg-alt));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.post-body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }

.post-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 10px;
}

.post-body h3 { font-size: 17px; }
.post-body p { color: var(--text-muted); font-size: 14px; margin: 0; flex: 1; }

.read-more { color: var(--accent); font-weight: 700; font-size: 13px; }

/* ---------- FAQ / accordion ---------- */

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--surface);
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  padding: 18px 22px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
}

.accordion-trigger::after {
  content: "+";
  color: var(--accent);
  font-size: 20px;
  transition: transform 0.2s ease;
}

.accordion-item.open .accordion-trigger::after { transform: rotate(45deg); }

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  padding: 0 22px;
  color: var(--text-muted);
  font-size: 14px;
}

.accordion-item.open .accordion-panel {
  max-height: 240px;
  padding-bottom: 20px;
}

/* ---------- Callout / disclaimer ---------- */

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  border-radius: var(--radius);
  padding: 20px 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.callout strong { color: var(--text); }

/* ---------- Contact form ---------- */

.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 560px;
  margin: 0 auto;
}

.field { margin-bottom: 18px; }

.field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
}

.field textarea { resize: vertical; min-height: 110px; }

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* ---------- Two column ---------- */

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.stat-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.stat-box strong { display: block; font-size: 26px; color: var(--accent); }
.stat-box span { font-size: 12px; color: var(--text-muted); }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-grid h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-grid ul li { margin-bottom: 10px; }
.footer-grid ul li a { color: var(--text); font-size: 14px; }
.footer-grid ul li a:hover { color: var(--accent); }
.footer-grid p { color: var(--text-muted); font-size: 14px; max-width: 320px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}

/* ---------- Page header (inner pages) ---------- */

.page-header {
  padding: 56px 0 40px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, rgba(45, 212, 191, 0.10), transparent 60%);
}

.page-header .eyebrow { display: block; }
.page-header p { color: var(--text-muted); max-width: 600px; margin: 12px auto 0; }

/* ---------- Blog post popup ---------- */

.post-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.post-modal.open { display: flex; }

.post-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(4, 12, 24, 0.75);
  backdrop-filter: blur(4px);
}

.post-modal-dialog {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 40px;
}

.post-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--text);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

.post-modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.post-modal-tag { margin-bottom: 14px; }

.post-modal-meta { margin-bottom: 6px; }

.post-modal-dialog h2 { margin-bottom: 18px; }

.post-modal-content p {
  color: var(--text-muted);
  margin: 0 0 16px;
}

.post-modal-content h4 {
  color: var(--text);
  margin: 24px 0 8px;
  font-size: 16px;
}

body.modal-open { overflow: hidden; }

@media (max-width: 720px) {
  .post-modal { padding: 12px; }
  .post-modal-dialog { padding: 28px 20px; max-height: 92vh; }
}

/* ---------- Utility ---------- */

.mt-lg { margin-top: 48px; }
.text-center { text-align: center; }

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links, .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: flex; }
  body.nav-open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    flex-direction: column;
    padding: 20px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border);
  }
  .grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
}