@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ─── Default: Light Theme ─── */
:root {
  --primary: #00d992;
  --primary-soft: #2fd6a1;
  --primary-deep: #10b981;
  --on-primary: #ffffff;
  --ink: #1e293b;
  --ink-strong: #0f172a;
  --body: #475569;
  --mute: #94a3b8;
  --hairline: #e2e8f0;
  --hairline-soft: #cbd5e1;
  --canvas: #ffffff;
  --canvas-soft: #f8fafc;
  --canvas-text-soft: #f1f5f9;
}

/* ─── Dark Theme ─── */
[data-theme="dark"] {
  --on-primary: #101010;
  --ink: #f2f2f2;
  --ink-strong: #ffffff;
  --body: #bdbdbd;
  --mute: #8b949e;
  --hairline: #3d3a39;
  --hairline-soft: #b8b3b0;
  --canvas: #101010;
  --canvas-soft: #1a1a1a;
  --canvas-text-soft: #f5f6f7;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --on-primary: #101010;
    --ink: #f2f2f2;
    --ink-strong: #ffffff;
    --body: #bdbdbd;
    --mute: #8b949e;
    --hairline: #3d3a39;
    --hairline-soft: #b8b3b0;
    --canvas: #101010;
    --canvas-soft: #1a1a1a;
    --canvas-text-soft: #f5f6f7;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--canvas-soft);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--primary-deep); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-soft); }

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--ink-strong);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* ─── Theme Toggle (for public pages) ─── */
.theme-toggle {
  background: none; border: 1px solid var(--hairline); border-radius: 6px;
  padding: 6px 10px; cursor: pointer; color: var(--body); font-size: 16px;
  display: flex; align-items: center; gap: 6px; transition: all 0.2s;
}
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* ─── Loading ─── */
.loading { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; background: var(--canvas); z-index: 9999; }
.loading .circle { font-size: 32px; color: var(--primary); animation: spin 800ms linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Header / Nav ─── */
header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 32px; background: var(--canvas);
  border-bottom: 1px solid var(--hairline); position: sticky; top: 0; z-index: 100;
}
header .brand { display: flex; align-items: center; gap: 8px; }
header .brand span { font-size: 22px; font-weight: 700; color: var(--ink-strong); letter-spacing: -0.5px; }
header .brand small { font-size: 10px; color: var(--primary); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
header nav { display: flex; align-items: center; gap: 24px; }
header nav a { color: var(--body); font-size: 14px; font-weight: 500; transition: color 0.2s; padding: 6px 0; }
header nav a:hover { color: var(--primary); }
header nav a.active { color: var(--primary); font-weight: 600; }
.close-nav { display: none; }
.nav-btn { display: none; font-size: 24px; color: var(--ink); cursor: pointer; }
.header-actions { display: flex; align-items: center; gap: 12px; }

/* ─── Hero ─── */
.hero-band {
  padding: 80px 32px 48px; text-align: center; background: var(--canvas);
  border-bottom: 1px dashed rgba(79, 93, 117, 0.4);
}
.hero-band h1 { font-size: 60px; font-weight: 400; line-height: 1; letter-spacing: -0.65px; color: var(--ink-strong); margin-bottom: 16px; }
.hero-band .eyebrow { font-size: 14px; font-weight: 600; letter-spacing: 2.52px; text-transform: uppercase; color: var(--primary); margin-bottom: 16px; }
.hero-band p { font-size: 18px; color: var(--body); max-width: 600px; margin: 0 auto 24px; line-height: 1.6; }

/* ─── Content Band ─── */
.content-band { padding: 64px 32px; background: var(--canvas); border-bottom: 1px dashed rgba(79, 93, 117, 0.4); }
.content-band h2 { font-size: 36px; font-weight: 400; letter-spacing: -0.9px; margin-bottom: 32px; text-align: center; }

/* ─── Services ─── */
.services { padding: 48px 32px; }
.services .content {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px; max-width: 1200px; margin: 0 auto;
}
.services .box {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px; background: var(--canvas); border: 1px solid var(--hairline);
  border-radius: 8px; min-height: 160px; position: relative;
  transition: border-color 0.2s, transform 0.2s; overflow: hidden;
}
.services .box::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(16, 16, 16, 0.75); border-radius: 8px;
}
.services .box:hover { border-color: var(--primary); transform: translateY(-2px); }
.services .box .title { position: relative; z-index: 1; color: #fff; font-weight: 600; font-size: 16px; text-align: center; }

/* ─── Why Us ─── */
.whyus { padding: 64px 32px; }
.whyus .filter { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; max-width: 900px; margin: 0 auto; }
.whyus .box { text-align: center; padding: 24px; background: var(--canvas); border: 1px solid var(--hairline); border-radius: 8px; transition: border-color 0.2s; }
.whyus .box:hover { border-color: var(--primary); }
.whyus .box i { font-size: 32px; color: var(--primary); margin-bottom: 12px; }
.whyus .box span { font-size: 14px; color: var(--body); line-height: 1.5; }

/* ─── Disclaimer ─── */
.disclaimer { padding: 48px 32px; max-width: 800px; margin: 0 auto; text-align: center; }
.disclaimer h1 { font-size: 14px; font-weight: 600; letter-spacing: 2.52px; text-transform: uppercase; color: var(--mute); margin-bottom: 16px; }
.disclaimer p { font-size: 14px; color: var(--mute); line-height: 1.7; }

/* ─── Buttons ─── */
.btn-vucl {
  display: inline-block; background: var(--primary); color: var(--on-primary) !important;
  font-family: 'Inter', sans-serif; font-size: 15px; font-weight: 600;
  line-height: 24px; padding: 15px 30px; border: none; border-radius: 12px;
  cursor: pointer; transition: all 0.2s; text-decoration: none;
  letter-spacing: 0.01em;
}
.btn-vucl:hover { opacity: 0.9; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.12); }
.btn-vucl:active { transform: translateY(0); }
.btn-vucl-outline {
  display: inline-block; background: transparent; color: var(--ink);
  font-family: 'Inter', sans-serif; font-size: 15px; font-weight: 600;
  line-height: 24px; padding: 15px 30px; border: 2px solid var(--hairline);
  border-radius: 12px; cursor: pointer; transition: all 0.2s;
  text-decoration: none;
}
.btn-vucl-outline:hover { border-color: var(--primary); color: var(--primary); box-shadow: 0 6px 20px rgba(0,0,0,0.08); }

/* ─── Cards ─── */
.card-vucl { background: var(--canvas); border: 1px solid var(--hairline); border-radius: 8px; padding: 24px; }
.card-vucl-em { background: var(--canvas); border: 3px solid var(--hairline); border-radius: 8px; padding: 24px; }

/* ─── Form Controls ─── */
.form-control-vucl {
  background: var(--canvas-soft); border: 2px solid var(--hairline); border-radius: 12px;
  padding: 14px 18px; color: var(--ink); font-family: 'Inter', sans-serif;
  font-size: 14px; width: 100%; transition: border-color 0.2s, box-shadow 0.25s, background 0.2s;
  line-height: 1.5;
}
.form-control-vucl:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 5px rgba(0, 217, 146, 0.15);
  background: var(--canvas);
}
.form-control-vucl::placeholder { color: var(--mute); font-size: 14px; }
.form-control-vucl:disabled {
  opacity: 0.6; cursor: not-allowed; background: var(--canvas-soft);
}
select.form-control-vucl {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat; background-position: right 16px center; background-size: 14px;
  padding-right: 46px;
}
select.form-control-vucl option { background: var(--canvas-soft); color: var(--ink); }
.form-control-vucl[type="file"] { padding: 11px 16px; cursor: pointer; }
.form-control-vucl[type="file"]::file-selector-button {
  background: var(--primary); border: none; border-radius: 8px;
  padding: 8px 18px; color: #fff; font-family: 'Inter', sans-serif;
  font-size: 13px; font-weight: 600; cursor: pointer; transition: opacity 0.2s;
  margin-right: 12px;
}
.form-control-vucl[type="file"]::file-selector-button:hover { opacity: 0.85; }
.form-group { margin-bottom: 22px; }
.form-group label {
  color: var(--ink-strong); font-size: 14px; font-weight: 600; margin-bottom: 8px; display: block;
  letter-spacing: -0.01em;
}

/* ─── Tables ─── */
.table-vucl { width: 100%; border-collapse: collapse; }
.table-vucl th {
  background: var(--canvas-soft); color: var(--mute); font-size: 12px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 1px;
  padding: 12px 20px; text-align: left; border-bottom: 1px solid var(--hairline);
}
.table-vucl td { padding: 12px 20px; border-bottom: 1px solid var(--hairline); color: var(--ink); font-size: 14px; }

/* ─── Auth Pages ─── */
.auth-page { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 24px; }
.auth-logo { margin-bottom: 24px; text-align: center; }
.auth-logo .brand-name { font-size: 28px; font-weight: 700; color: var(--ink-strong); letter-spacing: -0.5px; }
.auth-logo .brand-tag { font-size: 11px; color: var(--primary); font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; }
.auth-card {
  background: var(--canvas); border: 1px solid var(--hairline); border-radius: 16px;
  padding: 40px; width: 100%; max-width: 420px; box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.auth-card h5 { font-size: 24px; font-weight: 700; letter-spacing: -0.6px; margin-bottom: 8px; text-align: center; }
.auth-card .subtitle { color: var(--body); font-size: 14px; text-align: center; margin-bottom: 28px; }
.auth-card .form-group { margin-bottom: 20px; }
.auth-card .form-check { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 20px; }
.auth-card .form-check input[type="checkbox"] { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--primary); flex-shrink: 0; border-radius: 4px; }
.auth-card .form-check label { margin-bottom: 0; font-size: 14px; color: var(--body); line-height: 1.5; font-weight: 500; }
.auth-card .auth-footer { text-align: center; margin-top: 24px; font-size: 13px; color: var(--mute); }
.auth-card .auth-footer a { color: var(--primary); font-weight: 600; }

/* ─── Footer ─── */
footer { padding: 48px 32px; text-align: center; border-top: 1px solid var(--hairline); flex-shrink: 0; }
/* Sticky footer: make content between header and footer stretch */
header + *:not(footer) { flex: 1; }
footer .brand { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 12px; }
footer .brand span { font-size: 18px; font-weight: 700; color: var(--ink-strong); }
footer .brand small { font-size: 10px; color: var(--primary); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
footer .copy { font-size: 14px; color: var(--mute); display: block; margin-bottom: 8px; }
footer .social i { font-size: 24px; color: var(--mute); margin: 0 8px; transition: color 0.2s; cursor: pointer; }
footer .social i:hover { color: var(--primary); }

/* ─── Alerts ─── */
.alert-vucl { padding: 12px 16px; border-radius: 6px; font-size: 14px; margin-bottom: 16px; }
.alert-vucl-success { background: rgba(0, 217, 146, 0.1); border: 1px solid var(--primary); color: var(--primary-deep); }
.alert-vucl-danger { background: rgba(239, 68, 68, 0.1); border: 1px solid #ef4444; color: #ef4444; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  header nav { display: none; flex-direction: column; position: fixed; top: 0; right: 0; width: 280px; height: 100vh; background: var(--canvas); padding: 32px; border-left: 1px solid var(--hairline); z-index: 200; gap: 16px; }
  header nav.open { display: flex; }
  .close-nav { display: block; align-self: flex-end; font-size: 20px; cursor: pointer; color: var(--ink); }
  .nav-btn { display: block; }
  .hero-band h1 { font-size: 32px; }
  .hero-band { padding: 48px 20px 32px; }
  .services .content { grid-template-columns: 1fr; }
  .header-actions .theme-toggle span { display: none; }
}