/* ============================================
   SHARED COMPONENTS
   carbotrace.in | css/components.css
   ============================================ */


/* ================================================================== */
/*  NAVIGATION                                                         */
/* ================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding-block: var(--space-5);
  background-color: var(--color-secondary);   /* default: opaque on inner pages */
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base),
    padding-block var(--transition-base);
}

.nav--transparent {
  background-color: transparent;              /* homepage: transparent over full-height hero */
}

.nav.scrolled {
  background-color: var(--color-secondary);
  box-shadow: var(--shadow-lg);
  padding-block: var(--space-3);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* -- Logo -- */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-icon {
  flex-shrink: 0;
}

.nav__logo-wordmark {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-inverse);
  line-height: 1;
}

.nav__logo-wordmark em {
  color: var(--color-accent);
  font-style: normal;
}

/* -- Desktop links -- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: rgba(255 255 255 / 0.8);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: var(--color-text-inverse);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

/* -- Hamburger button -- */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.nav__hamburger-line {
  display: block;
  height: 2px;
  background-color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
  transform-origin: center;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* -- Mobile menu panel -- */
.nav__mobile {
  display: none;
  flex-direction: column;
  background-color: var(--color-secondary);
  padding: var(--space-2) var(--container-padding) var(--space-6);
  border-top: 1px solid rgba(255 255 255 / 0.08);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile-link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: rgba(255 255 255 / 0.8);
  text-decoration: none;
  border-bottom: 1px solid rgba(255 255 255 / 0.07);
  transition: color var(--transition-fast);
}

.nav__mobile-link:last-child {
  border-bottom: none;
}

.nav__mobile-link:hover,
.nav__mobile-link[aria-current="page"] {
  color: var(--color-accent);
}

.nav__mobile-cta {
  display: inline-flex !important;
  margin-top: var(--space-5);
  text-align: center;
  justify-content: center;
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }
}


/* ================================================================== */
/*  BUTTONS                                                            */
/* ================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  line-height: 1;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

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

/* Primary (gold, high CTA weight) */
.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-secondary);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-md);
}

/* Secondary (green) */
.btn--secondary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn--secondary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

/* Outline on dark backgrounds */
.btn--outline {
  background-color: transparent;
  color: var(--color-text-inverse);
  border-color: rgba(255 255 255 / 0.45);
}

.btn--outline:hover {
  background-color: rgba(255 255 255 / 0.1);
  border-color: rgba(255 255 255 / 0.75);
}

/* Outline on light backgrounds */
.btn--outline-dark {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline-dark:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Size variants */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn--full {
  width: 100%;
}

/* Loading state */
.btn[aria-busy="true"] {
  opacity: 0.7;
  cursor: wait;
  pointer-events: none;
}


/* ================================================================== */
/*  BADGE                                                              */
/* ================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge--primary {
  background-color: rgba(10, 92, 54, 0.1);
  color: var(--color-primary-dark);
}

.badge--accent {
  background-color: rgba(200, 168, 75, 0.15);
  color: var(--color-accent-dark);
}

.badge--urgent {
  background-color: rgba(220, 38, 38, 0.1);
  color: var(--color-error);
}

.badge--muted {
  background-color: var(--color-surface-alt);
  color: var(--color-text-muted);
}

.badge--light {
  background-color: rgba(255 255 255 / 0.12);
  color: rgba(255 255 255 / 0.9);
}

.badge--light-accent {
  background-color: rgba(200, 168, 75, 0.2);
  color: var(--color-accent-light);
}


/* ================================================================== */
/*  SECTION HEADER                                                     */
/* ================================================================== */

.section-header {
  margin-bottom: var(--space-16);
  text-align: center;
}

.section-header .badge {
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--weight-normal);
  line-height: var(--leading-tight);
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 640px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

.section-header--left {
  text-align: left;
}

.section-header--left .section-subtitle {
  margin-inline: 0;
}

/* Dark variant */
.section-header--dark .section-title {
  color: var(--color-text-inverse);
}

.section-header--dark .section-subtitle {
  color: rgba(255 255 255 / 0.7);
}

@media (max-width: 768px) {
  .section-title {
    font-size: var(--text-3xl);
  }

  .section-header {
    margin-bottom: var(--space-10);
  }
}


/* ================================================================== */
/*  CARD                                                               */
/* ================================================================== */

.card {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card--flat {
  transition: none;
}

.card--flat:hover {
  box-shadow: none;
  transform: none;
}

.card--dark {
  background: rgba(255 255 255 / 0.04);
  border-color: rgba(255 255 255 / 0.1);
}

.card--accent {
  border-color: var(--color-accent);
  border-width: var(--border-width-2);
}


/* ================================================================== */
/*  FEATURE CHECK LIST                                                 */
/* ================================================================== */

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
}

.feature-list__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.feature-list__check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: rgba(10, 92, 54, 0.1);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.feature-list--dark .feature-list__item {
  color: rgba(255 255 255 / 0.7);
}

.feature-list--dark .feature-list__check {
  background: rgba(200, 168, 75, 0.15);
}


/* ================================================================== */
/*  CTA BLOCK (full-width banner)                                      */
/* ================================================================== */

.cta-block {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary) 100%);
  padding-block: var(--space-24);
  text-align: center;
}

.cta-block__label {
  margin-bottom: var(--space-5);
}

.cta-block__title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-5);
  line-height: var(--leading-tight);
}

.cta-block__subtitle {
  font-size: var(--text-lg);
  color: rgba(255 255 255 / 0.7);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-10);
  line-height: var(--leading-relaxed);
}

.cta-block__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .cta-block {
    padding-block: var(--space-16);
  }

  .cta-block__title {
    font-size: var(--text-4xl);
  }

  .cta-block__actions {
    flex-direction: column;
    align-items: stretch;
  }
}


/* ================================================================== */
/*  DATA TABLE                                                         */
/* ================================================================== */

.data-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: var(--border-width) solid var(--color-border);
}

.data-table {
  width: 100%;
  font-size: var(--text-sm);
  border-collapse: collapse;
}

.data-table thead {
  background: var(--color-surface-alt);
}

.data-table th {
  padding: var(--space-3) var(--space-5);
  text-align: left;
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  border-bottom: var(--border-width) solid var(--color-border);
  white-space: nowrap;
}

.data-table td {
  padding: var(--space-4) var(--space-5);
  color: var(--color-text-muted);
  border-bottom: var(--border-width) solid var(--color-border);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover td {
  background: var(--color-surface-alt);
}

.data-table td strong {
  color: var(--color-text);
}

.data-table td.highlight {
  color: var(--color-primary);
  font-weight: var(--weight-semibold);
}


/* ================================================================== */
/*  ALERT / INLINE MESSAGE                                             */
/* ================================================================== */

.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.alert--success {
  background: rgba(22, 163, 74, 0.08);
  border: 1px solid rgba(22, 163, 74, 0.25);
  color: #15803d;
}

.alert--error {
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.25);
  color: #b91c1c;
}

.alert p {
  color: inherit;
  margin: 0;
}


/* ================================================================== */
/*  PAGE HERO (inner pages)                                            */
/* ================================================================== */

.page-hero {
  background: linear-gradient(160deg, var(--color-secondary) 0%, var(--color-primary-dark) 100%);
  padding-top: calc(var(--space-32) + var(--space-8));
  padding-bottom: var(--space-20);
  text-align: center;
}

.page-hero .badge {
  margin-bottom: var(--space-5);
}

.page-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-6xl);
  color: var(--color-text-inverse);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  max-width: 820px;
  margin-inline: auto;
}

.page-hero__subtitle {
  font-size: var(--text-xl);
  color: rgba(255 255 255 / 0.7);
  max-width: 640px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

@media (max-width: 768px) {
  .page-hero {
    padding-top: calc(var(--space-24) + var(--space-8));
    padding-bottom: var(--space-16);
  }

  .page-hero__title {
    font-size: var(--text-4xl);
  }

  .page-hero__subtitle {
    font-size: var(--text-lg);
  }
}


/* ================================================================== */
/*  FOOTER                                                             */
/* ================================================================== */

.footer {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
  padding-top: var(--space-16);
}

.footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-16);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid rgba(255 255 255 / 0.09);
}

/* Logo */
.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  margin-bottom: var(--space-4);
}

.footer__logo-wordmark {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-inverse);
  line-height: 1;
}

.footer__logo-wordmark em {
  color: var(--color-accent);
  font-style: normal;
}

.footer__brand p {
  color: rgba(255 255 255 / 0.55);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  max-width: 320px;
}

.footer__col-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: rgba(255 255 255 / 0.35);
  margin-bottom: var(--space-5);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: rgba(255 255 255 / 0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.footer__contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: rgba(255 255 255 / 0.4);
}

.footer__contact-text {
  font-size: var(--text-sm);
  color: rgba(255 255 255 / 0.6);
  line-height: var(--leading-normal);
}

.footer__contact-text a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__contact-text a:hover {
  text-decoration: underline;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-6);
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: rgba(255 255 255 / 0.3);
}

.footer__legal-links {
  display: flex;
  gap: var(--space-6);
}

.footer__legal-link {
  font-size: var(--text-xs);
  color: rgba(255 255 255 / 0.3);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__legal-link:hover {
  color: rgba(255 255 255 / 0.65);
}

@media (max-width: 1024px) {
  .footer__main {
    grid-template-columns: 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .footer__main {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .footer__brand {
    grid-column: auto;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}