/* ═══════════════════════════════════════════════════════════
   FULTERNET — Components v2
   Nav, buttons, form, language toggle, decorative elements.
   ═══════════════════════════════════════════════════════════ */

/* ═══ NAVIGATION ═══ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 clamp(24px, 4vw, 60px);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--duration-normal) var(--ease-luxe);
}

.nav--scrolled {
  background: rgba(12, 12, 15, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  height: 64px;
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.nav__brand {
  text-decoration: none;
}

.nav__brand-text {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: var(--tracking-hero);
  color: var(--text-primary);
  opacity: 0.8;
  transition: opacity var(--duration-fast) var(--ease-luxe);
}

.nav__brand:hover .nav__brand-text {
  opacity: 1;
}

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

/* ═══ LANGUAGE TOGGLE ═══ */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 2px;
  transition: border-color var(--duration-fast) var(--ease-luxe);
}

.lang-toggle:hover {
  border-color: var(--border-accent);
}

.lang-toggle__option {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-luxe);
  cursor: pointer;
  background: none;
  border: none;
  padding: 2px 4px;
}

.lang-toggle__option--active {
  color: var(--text-primary);
}

.lang-toggle__divider {
  width: 1px;
  height: 10px;
  background: rgba(255,255,255,0.1);
}

/* ═══ CTA BUTTON ═══ */
.btn {
  display: inline-block;
  padding: 16px 40px;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 0;
  background: transparent;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-luxe);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
  z-index: -1;
}

.btn:hover {
  color: var(--bg-primary);
  border-color: var(--accent);
  letter-spacing: calc(var(--tracking-wide) + 0.04em);
}

.btn:hover::before {
  transform: scaleX(1);
}

.btn:active {
  transform: scale(0.98);
}

/* ═══ FORM ═══ */
.form__group {
  margin-bottom: clamp(20px, 3vw, 28px);
}

.form__label {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: 14px 0;
  font-size: var(--text-body);
  font-weight: 300;
  color: var(--text-primary);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: border-color var(--duration-normal) var(--ease-luxe),
              box-shadow var(--duration-normal) var(--ease-luxe);
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  border-bottom-color: var(--accent);
  box-shadow: 0 1px 0 0 var(--accent);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--text-tertiary);
  opacity: 0.5;
}

.form__select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='none' stroke='%238a6f4e' stroke-width='1' d='M1 1l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 4px center;
  padding-right: 24px;
}

.form__select option {
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 8px;
}

.form__textarea {
  min-height: 100px;
  resize: vertical;
}

.form__submit {
  margin-top: var(--space-sm);
  width: 100%;
}

.form__note {
  margin-top: var(--space-sm);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  text-align: center;
  font-style: italic;
  opacity: 0.6;
}

.form__email {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: var(--text-small);
  color: var(--text-tertiary);
  letter-spacing: var(--tracking-wide);
  transition: color var(--duration-fast) var(--ease-luxe);
}

.form__email:hover {
  color: var(--accent);
}

/* Form Success */
.form__success {
  display: none;
  text-align: center;
  padding: var(--space-lg) 0;
}

.form__success.is-visible {
  display: block;
}

.form__success h3 {
  font-family: var(--font-serif);
  font-size: var(--text-h3);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.form__success p {
  color: var(--text-secondary);
}

.form.is-submitted .form__fields {
  display: none;
}

.form.is-submitted .form__success {
  display: block;
}

/* ═══ AMBIENT GLOW ═══ */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.ambient-glow--hero {
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 700px;
  background: radial-gradient(
    ellipse at center,
    rgba(184, 151, 106, 0.08) 0%,
    rgba(184, 151, 106, 0.03) 40%,
    transparent 70%
  );
}

.ambient-glow--pillars {
  top: -100px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle at center,
    rgba(184, 151, 106, 0.06) 0%,
    transparent 60%
  );
}

.ambient-glow--presence {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle at center,
    rgba(184, 151, 106, 0.05) 0%,
    transparent 60%
  );
}

.ambient-glow--contact {
  bottom: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle at center,
    rgba(184, 151, 106, 0.06) 0%,
    transparent 60%
  );
}

/* ═══ GEOMETRIC ACCENTS ═══ */
.geo-accent {
  position: absolute;
  pointer-events: none;
  z-index: 1;
  opacity: 0.4;
}

.geo-accent svg {
  overflow: visible;
}

.geo-accent--pillars-left {
  top: 40px;
  left: clamp(-20px, -2vw, 0px);
}

.geo-accent--pillars-right {
  top: 100px;
  right: clamp(-20px, -2vw, 0px);
}

.geo-accent--philosophy {
  top: 20px;
  right: clamp(-10px, 2vw, 40px);
  opacity: 0.25;
}

.geo-line {
  stroke: var(--accent-dim);
  stroke-width: 0.5;
  fill: none;
}

/* Hide geo-accents on mobile */
@media (max-width: 768px) {
  .geo-accent {
    display: none;
  }
}