/* ═══════════════════════════════════════════
   OPSIVO — Layout & Components
   ═══════════════════════════════════════════ */

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--t-mid) var(--ease),
              border-color var(--t-mid) var(--ease),
              backdrop-filter var(--t-mid);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(4, 8, 15, 0.88);
  backdrop-filter: blur(20px);
  border-bottom-color: var(--border-1);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav__logo img { height: 34px; width: auto; }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  transition: color var(--t-fast);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--grad-text);
  transform: scaleX(0);
  transition: transform var(--t-mid) var(--ease);
  transform-origin: left;
}

.nav__links a:hover { color: var(--text-primary); }
.nav__links a:hover::after { transform: scaleX(1); }

.nav__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__lang {
  display: flex;
  gap: 2px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--r-full);
  padding: 3px;
}

.lang-btn {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.6rem;
  border-radius: var(--r-full);
  color: var(--text-muted);
  transition: all var(--t-fast);
}

.lang-btn.active {
  background: var(--grad);
  color: #fff;
}

.lang-btn:hover:not(.active) { color: var(--text-secondary); }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--t-mid);
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  padding: 0.65rem 1.4rem;
  border-radius: var(--r-md);
  transition: all var(--t-mid) var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(10,174,238,0.25);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(10,174,238,0.38);
  opacity: 0.92;
}

.btn--ghost {
  border: 1px solid var(--border-2);
  color: var(--text-secondary);
  background: var(--surface-1);
}

.btn--ghost:hover {
  border-color: var(--border-blue);
  color: var(--text-primary);
  background: var(--surface-2);
}

.btn--lg {
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: var(--r-md);
}

.btn--sm {
  font-size: 0.8rem;
  padding: 0.45rem 1rem;
}

/* ── SECTION HEADER ── */
.section-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
  font-weight: 400;
}

/* ── BADGE ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(10,174,238,0.08);
  border: 1px solid rgba(10,174,238,0.2);
  border-radius: var(--r-full);
  padding: 0.35rem 1rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--blue-light);
}

.badge__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2.2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.4); }
}

/* ── CARD ── */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--r-lg);
  transition: border-color var(--t-mid), transform var(--t-mid), box-shadow var(--t-mid);
}

.card:hover {
  border-color: var(--border-blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

/* ── MOBILE NAV ── */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0; bottom: 0;
  background: rgba(4,8,15,0.98);
  backdrop-filter: blur(24px);
  z-index: 190;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  border-top: 1px solid var(--border-1);
}

.nav__mobile.open { display: flex; }

.nav__mobile a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: color var(--t-fast);
}

.nav__mobile a:hover { color: var(--text-primary); }

/* ── FORM INPUTS ── */
.input {
  background: var(--surface-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  padding: 0.8rem 1.2rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--t-mid), box-shadow var(--t-mid);
  width: 100%;
}

.input::placeholder { color: var(--text-muted); }

.input:focus {
  border-color: rgba(10,174,238,0.45);
  box-shadow: 0 0 0 3px rgba(10,174,238,0.1);
}

.input--error {
  border-color: rgba(239,68,68,0.5);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.08);
}

/* ── SUCCESS MESSAGE ── */
.success-msg {
  display: none;
  align-items: center;
  gap: var(--space-2);
  background: rgba(32,194,90,0.08);
  border: 1px solid rgba(32,194,90,0.22);
  border-radius: var(--r-md);
  padding: 0.8rem 1.2rem;
  color: var(--green-light);
  font-size: 0.9rem;
  font-weight: 500;
}

.success-msg.show { display: flex; }

/* ── DIVIDER ── */
.divider {
  border: none;
  border-top: 1px solid var(--border-1);
}

/* ── RESPONSIVE HELPERS ── */
@media (max-width: 960px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
}

@media (max-width: 768px) {
  .btn--lg { font-size: 0.9rem; padding: 0.8rem 1.6rem; }
  .section-sub { font-size: 0.95rem; }
}