.btn {
  --btn-bg: rgba(74, 47, 22, 0.64);
  --btn-line: var(--cm-line-strong);
  --btn-color: var(--cm-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  width: 100%;
  padding: 13px 18px;
  border: 1px solid var(--btn-line);
  border-radius: var(--radius-6);
  background: var(--btn-bg);
  color: var(--btn-color);
  font-family: var(--font-title);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-align: center;
  box-shadow: 0 8px 28px rgba(0,0,0,0.28), inset 0 1px 0 rgba(255,255,255,0.12);
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease, box-shadow 0.16s ease, color 0.16s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: var(--cm-gold-2);
  box-shadow: 0 12px 34px rgba(0,0,0,0.38), 0 0 22px rgba(200,161,91,0.13), inset 0 1px 0 rgba(255,255,255,0.18);
}

.btn:active { transform: translateY(0) scale(0.985); }

.btn--primary {
  --btn-bg: #b8843d;
  --btn-line: rgba(239, 202, 130, 0.72);
  --btn-color: #120d08;
}

.btn--outline {
  --btn-bg: rgba(18, 13, 8, 0.34);
  color: var(--cm-gold-2);
}

.btn--ghost {
  --btn-bg: rgba(255,255,255,0.03);
  --btn-line: rgba(255,255,255,0.13);
  color: var(--cm-text-soft);
}

.frame-gold, .frame-soft {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--cm-line-strong);
  background: rgba(0,0,0,0.28);
  box-shadow: var(--shadow-gold);
}

.frame-gold::after, .frame-soft::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent 18%, transparent 76%, rgba(200,161,91,0.13));
  opacity: 0.72;
}

.frame-gold { border-radius: var(--radius-10); }
.frame-soft { border-radius: var(--radius-20); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cm-gold-2);
  font-family: var(--font-title);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.16s ease, transform 0.16s ease;
}
.text-link::after { content: "→"; transition: transform 0.16s ease; }
.text-link:hover { color: #fff1c4; transform: translateX(1px); }
.text-link:hover::after { transform: translateX(3px); }

.cm-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, 1120px);
  margin: 0 auto;
  padding: 18px 0 12px;
  transition: background 0.2s ease, padding 0.2s ease, backdrop-filter 0.2s ease;
}

.cm-header.is-scrolled {
  width: 100%;
  padding: 12px 16px;
  background: rgba(5, 4, 3, 0.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(200,161,91,0.12);
}

.cm-brand {
  color: var(--cm-gold-2);
  font-family: var(--font-title);
  font-size: clamp(1rem, 5vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.cm-menu-toggle {
  display: grid;
  gap: 4px;
  width: 44px;
  height: 44px;
  place-content: center;
  border: 0;
  border-radius: 10px;
  background: transparent;
}
.cm-menu-toggle span {
  display: block;
  width: 22px;
  height: 4px;
  border-radius: 999px;
  background: var(--cm-gold);
  box-shadow: 0 0 12px rgba(200,161,91,0.24);
}

.nav-modal,
.quiz-modal,
.project-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: start center;
  padding: 70px 16px 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}
.nav-modal.is-open,
.quiz-modal.is-open,
.project-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}
.nav-modal__backdrop,
.quiz-modal__backdrop,
.project-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(9px);
}

.nav-modal__panel,
.quiz-modal__panel,
.project-modal__panel {
  position: relative;
  width: min(100%, 440px);
  max-height: calc(100vh - 92px);
  overflow: auto;
  border: 1px solid rgba(200,161,91,0.46);
  border-radius: 16px;
  background:
    linear-gradient(rgba(20,13,6,0.88), rgba(20,13,6,0.92)),
    url("../img/bg/paper-aged.webp"),
    var(--cm-surface);
  background-size: cover;
  box-shadow: 0 24px 80px rgba(0,0,0,0.7), inset 0 1px 0 rgba(255,255,255,0.13);
  transform: translateY(-10px) scale(0.96);
  transition: transform 0.2s ease;
}
.is-open .nav-modal__panel,
.is-open .quiz-modal__panel,
.is-open .project-modal__panel { transform: translateY(0) scale(1); }

.nav-modal__panel {
  display: grid;
  gap: 10px;
  padding: 28px 18px 18px;
}

.nav-modal__panel a,
.nav-modal__quiz {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(224,194,125,0.56);
  border-radius: 6px;
  background: rgba(88,58,26,0.62);
  color: #fff3d8;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-align: center;
  transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease;
}
.nav-modal__panel a:hover,
.nav-modal__quiz:hover {
  transform: translateY(-1px);
  background: rgba(125,82,35,0.72);
  border-color: var(--cm-gold-2);
}
.nav-modal__quiz { width: 100%; }
.nav-modal__primary { background: #b8843d !important; color: #120d08 !important; }
.nav-modal__close,
.quiz-modal__close,
.project-modal__close {
  position: absolute;
  top: 8px;
  right: 10px;
  z-index: 2;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  background: rgba(0,0,0,0.28);
  color: var(--cm-text);
  font-size: 1.35rem;
  line-height: 1;
}

.btn[disabled],
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
}


.project-modal {
  place-items: center;
  padding: 16px;
}

.project-modal__panel {
  width: min(100%, 980px);
  max-height: calc(100vh - 28px);
  padding: 18px;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(420px, 1fr) auto;
}

.project-modal__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 8px 40px 14px 0;
}

.project-modal__head h2 {
  margin: 0;
  color: var(--cm-gold-2);
  font-size: clamp(1.35rem, 6vw, 2.35rem);
}

.project-modal__external {
  flex: 0 0 auto;
  margin-top: 5px;
  color: var(--cm-gold-2);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.project-modal__iframe-wrap {
  min-height: 420px;
  overflow: hidden;
  border: 1px solid rgba(200,161,91,0.24);
  border-radius: 12px;
  background: #050403;
}

.project-modal__iframe-wrap iframe {
  width: 100%;
  height: min(72vh, 760px);
  min-height: 420px;
  display: block;
  border: 0;
  background: #050403;
}

.project-modal__note {
  margin: 10px 0 0;
  color: var(--cm-muted);
  font-size: 0.78rem;
  text-align: center;
}

@media (max-width: 620px) {
  .project-modal__panel {
    max-height: calc(100vh - 18px);
    padding: 14px;
    grid-template-rows: auto minmax(70vh, 1fr) auto;
  }

  .project-modal__head {
    display: grid;
    padding-right: 38px;
  }

  .project-modal__external {
    margin-top: 0;
  }

  .project-modal__iframe-wrap,
  .project-modal__iframe-wrap iframe {
    min-height: 70vh;
  }
}


/* V1.3 · pulso lento para CTA principal */
.btn--pulse {
  animation: cmPulse 3.8s ease-in-out infinite;
}

@keyframes cmPulse {
  0%, 100% { box-shadow: 0 8px 28px rgba(0,0,0,0.28), 0 0 0 rgba(200,161,91,0); }
  50% { box-shadow: 0 12px 34px rgba(0,0,0,0.38), 0 0 0 8px rgba(200,161,91,0.08); }
}