/* ==========================================================================
   LogiTrack Landing — Mobile First
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafc;
  --color-primary: #7c3aed;
  --color-primary-dark: #5b21b6;
  --color-primary-soft: rgba(124, 58, 237, 0.1);
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-white: #ffffff;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-pill: 999px;

  --container: min(1120px, calc(100% - 2rem));
  --header-h: 72px;

  --font: "Inter", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: var(--container);
  margin-inline: auto;
}

.text-accent {
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9375rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

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

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  box-shadow: 0 10px 24px rgba(124, 58, 237, 0.25);
}

.btn--primary:hover {
  box-shadow: 0 14px 32px rgba(124, 58, 237, 0.32);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--sm {
  padding: 0.625rem 1.125rem;
  font-size: 0.875rem;
}

.btn--light {
  background: var(--color-white);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 300;
  padding: 0.625rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-primary-dark);
  color: var(--color-white);
  font-weight: 600;
  font-size: 0.875rem;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-primary-soft);
  outline-offset: 2px;
}

.top-banner {
  background: linear-gradient(90deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-white);
}

.top-banner__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.625rem 0;
  text-align: center;
}

.top-banner__badge {
  flex-shrink: 0;
  padding: 0.2rem 0.625rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.2);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.top-banner__text {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.4;
}

.logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.logo__img {
  width: auto;
  height: 2.25rem;
  max-width: 160px;
  object-fit: contain;
}

.logo__img--footer {
  height: 2rem;
  max-width: 140px;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 1.125rem;
  height: 2px;
  margin-inline: auto;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-120%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
}

.nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav__link {
  display: block;
  padding: 0.75rem 0.5rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}

.nav__link:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.nav__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.nav__login {
  font-weight: 600;
  color: var(--color-text);
  padding: 0.5rem;
}

/* Hero */
.hero {
  padding: 3rem 0 4rem;
  background:
    radial-gradient(circle at 10% 0%, rgba(124, 58, 237, 0.08), transparent 42%),
    var(--color-bg);
}

.hero__grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  margin-bottom: 1.25rem;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hero__title {
  margin: 0 0 1rem;
  font-size: clamp(2.25rem, 7vw, 3.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero__subtitle {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

/* Real screenshots */
.hero__visual {
  min-width: 0;
}

.screenshot-frame {
  margin: 0;
  border-radius: var(--radius-md);
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.screenshot-frame--hero {
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.screenshot-frame__chrome {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.75rem 1rem;
  background: #f3f4f6;
  border-bottom: 1px solid var(--color-border);
}

.dot {
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 50%;
}

.dot--red {
  background: #fca5a5;
}

.dot--yellow {
  background: #fcd34d;
}

.dot--green {
  background: #6ee7b7;
}

.screenshot-frame__url {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.screenshot-frame__img {
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.screenshot-frame__caption {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  background: #f9fafc;
  border-top: 1px solid var(--color-border);
}

/* Value proposition */
.value-prop {
  padding: 4.5rem 0;
}

.value-prop__grid {
  display: grid;
  gap: 1.25rem;
}

.value-card {
  padding: 1.75rem;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.value-card__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
}

.value-card--problem .value-card__icon {
  background: #fef2f2;
  color: #dc2626;
}

.value-card--solution .value-card__icon {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.value-card--impact .value-card__icon {
  background: #ecfdf5;
  color: #059669;
}

.value-card__icon svg {
  width: 1.35rem;
  height: 1.35rem;
}

.value-card__title {
  margin: 0 0 0.625rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.value-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.value-card__list {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.value-card__list li + li {
  margin-top: 0.375rem;
}

/* Mockups */
.mockups-grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.mockup-card {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

.mockup-card__device {
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.mockup-card__device--desktop {
  width: 100%;
}

.mockup-card__device--mobile {
  width: min(100%, 260px);
  margin-inline: auto;
  border-radius: 1.75rem;
  padding: 0.625rem;
  background: #1f2937;
}

.mockup-card__notch {
  width: 5rem;
  height: 0.375rem;
  margin: 0.375rem auto 0.5rem;
  border-radius: var(--radius-pill);
  background: #374151;
}

.mockup-card__chrome {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.625rem 0.875rem;
  background: #f3f4f6;
  border-bottom: 1px solid var(--color-border);
}

.mockup-card__url {
  margin-left: 0.375rem;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

.mockup-card__screen {
  aspect-ratio: 16 / 10;
  background: var(--color-bg-alt);
  overflow: hidden;
}

.mockup-card__screen--mobile {
  aspect-ratio: 9 / 16;
  border-radius: 1.25rem;
  background: #111827;
}

.mockup-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mockup-card__img--mobile {
  object-fit: contain;
  background: #111827;
}

.screenshot-frame__img--contain {
  object-fit: contain;
  background: var(--color-bg-alt);
  aspect-ratio: 792 / 894;
}

.mockup-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 100%;
  min-height: 12rem;
  padding: 1.5rem;
  background: linear-gradient(145deg, #f3f4f6 0%, #e5e7eb 100%);
  text-align: center;
}

.mockup-card__screen--mobile .mockup-placeholder {
  background: linear-gradient(145deg, #1f2937 0%, #111827 100%);
  color: #9ca3af;
}

.mockup-placeholder--inline {
  min-height: 14rem;
  border-radius: 0;
}

.mockup-placeholder__icon {
  width: 2.5rem;
  height: 2.5rem;
  opacity: 0.6;
}

.mockup-placeholder__label {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text);
}

.mockup-card__screen--mobile .mockup-placeholder__label {
  color: #e5e7eb;
}

.mockup-placeholder__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.mockup-card__screen--mobile .mockup-placeholder__hint {
  color: #6b7280;
}

.mockup-card__info {
  text-align: center;
}

.mockup-card__tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.625rem;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 600;
}

.mockup-card__tag--mobile {
  background: #ecfdf5;
  color: #047857;
}

.mockup-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.mockup-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  max-width: 28rem;
  margin-inline: auto;
}

/* Team */
.team {
  padding: 4.5rem 0;
}

.team__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  gap: 1.25rem;
}

.team-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.75rem 1.25rem;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.team-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.team-card__avatar {
  display: grid;
  place-items: center;
  width: 4rem;
  height: 4rem;
  margin-bottom: 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.team-card__name {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.team-card__role {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Contact */
.contact {
  padding: 4.5rem 0;
}

.contact__grid {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

.contact__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.contact__text {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  max-width: 32rem;
}

.contact__highlights {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.contact__highlights li + li {
  margin-top: 0.375rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
  padding: 1.75rem;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.contact-form__submit {
  width: 100%;
  border: none;
  margin-top: 0.25rem;
}

.contact-form__submit.is-loading .contact-form__submit-text {
  display: none;
}

.contact-form__submit-loading {
  display: none;
  align-items: center;
  gap: 0.5rem;
}

.contact-form__submit.is-loading .contact-form__submit-loading {
  display: inline-flex;
}

.form-spinner {
  width: 1rem;
  height: 1rem;
  animation: spin 0.8s linear infinite;
}

.contact-form__submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.contact-form__status {
  margin: 0;
  padding: 0.75rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
}

.contact-form__status[hidden] {
  display: none;
}

.contact-form__status--success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #047857;
}

.contact-form__status--error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}

/* Platform showcase */
.platform-showcase {
  padding: 4rem 0;
}

.platform-showcase__grid {
  display: grid;
  gap: 2rem;
}

.screenshot-card {
  margin: 0;
}

.screenshot-card__caption {
  display: grid;
  gap: 0.375rem;
  margin-top: 1rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  text-align: center;
}

.screenshot-card__caption strong {
  color: var(--color-text);
  font-size: 1rem;
}

/* Features */
.section--alt {
  background: var(--color-bg-alt);
}

.features {
  padding: 4.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}

.section-header__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-header__subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

.features__grid {
  display: grid;
  gap: 1.25rem;
}

.feature-card {
  padding: 1.75rem;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.feature-card__icon svg {
  width: 1.35rem;
  height: 1.35rem;
}

.feature-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.feature-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* CTA band */
.cta-band {
  padding: 3rem 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
}

.cta-band__inner {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

.cta-band__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.cta-band__text {
  margin: 0;
  opacity: 0.9;
  max-width: 36rem;
}

.cta-band__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn--ghost-light {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn--ghost-light:hover {
  border-color: var(--color-white);
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

/* Footer */
.footer {
  padding: 2.5rem 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer__copy {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Tablet+
   ========================================================================== */

@media (min-width: 640px) {
  .hero__cta {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .mockups-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .mockup-card {
    grid-template-columns: 1fr;
  }

  .value-prop__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .value-prop__grid .value-card--impact {
    grid-column: 1 / -1;
  }

  .contact__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .contact-form__submit {
    width: auto;
    justify-self: start;
    min-width: 10rem;
  }

  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta-band__inner {
    grid-template-columns: 1fr auto;
  }

  .cta-band__actions {
    flex-direction: row;
  }

  .platform-showcase__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ==========================================================================
   Desktop
   ========================================================================== */

@media (min-width: 960px) {
  .nav-toggle {
    display: none;
  }

  .nav {
    position: static;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    padding: 0;
    margin-left: 2rem;
    background: transparent;
    border: none;
    box-shadow: none;
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: row;
    gap: 0.25rem;
    margin-inline: auto;
  }

  .nav__link {
    padding: 0.5rem 0.875rem;
    font-size: 0.9375rem;
  }

  .nav__actions {
    flex-direction: row;
    align-items: center;
    padding-top: 0;
    border-top: none;
    gap: 1rem;
  }

  .hero {
    padding: 5rem 0 6rem;
  }

  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }

  .value-prop__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .value-prop__grid .value-card--impact {
    grid-column: auto;
  }

  .features {
    padding: 6rem 0;
  }

  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-header {
    margin-bottom: 3rem;
  }

  .mockup-card__info {
    text-align: left;
  }

  .mockup-card__text {
    margin-inline: 0;
  }
}

/* Focus visible for keyboard navigation */
.btn:focus-visible,
.nav__link:focus-visible,
.nav__login:focus-visible,
.nav-toggle:focus-visible,
.form-field__input:focus-visible,
.demo-modal__close:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

@media (min-width: 1100px) {
  .hero__grid {
    gap: 4.5rem;
  }
}

/* ==========================================================================
   Demo Modal — Lead Capture
   ========================================================================== */

body.is-modal-open {
  overflow: hidden;
}

.demo-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.demo-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.demo-modal[hidden] {
  display: none;
}

.demo-modal:not([hidden]) {
  display: grid;
}

.demo-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.demo-modal.is-open .demo-modal__backdrop {
  opacity: 1;
}

.demo-modal__panel {
  position: relative;
  width: min(100%, 560px);
  max-height: min(92vh, 820px);
  overflow-y: auto;
  padding: 2rem 1.5rem 1.5rem;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(16px) scale(0.97);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.3s ease;
}

.demo-modal.is-open .demo-modal__panel {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.demo-modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.demo-modal__close:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.demo-modal__close svg {
  width: 1rem;
  height: 1rem;
}

.demo-modal__header {
  margin-bottom: 1.5rem;
  padding-right: 2rem;
}

.demo-modal__title {
  margin: 0.75rem 0 0.5rem;
  font-size: clamp(1.375rem, 3vw, 1.625rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.demo-modal__subtitle {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.demo-form__grid {
  display: grid;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-field--full {
  grid-column: 1 / -1;
}

.form-field__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-field__optional {
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-field__input {
  width: 100%;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field__input::placeholder {
  color: #9ca3af;
}

.form-field__input:hover {
  border-color: #d1d5db;
}

.form-field__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.form-field__input.is-invalid {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.form-field__select {
  appearance: none;
  padding-right: 2.25rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  cursor: pointer;
}

.form-field__select:invalid,
.form-field__select option[value=""] {
  color: #9ca3af;
}

.form-field__textarea {
  resize: vertical;
  min-height: 5.5rem;
}

.form-field__error {
  min-height: 1.125rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: #dc2626;
}

.demo-form__actions {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.demo-form__global-error {
  margin: 0.25rem 0 0;
  padding: 0.75rem 0.875rem;
  border-radius: var(--radius-sm);
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: center;
}

.demo-form__global-error[hidden] {
  display: none;
}

.demo-form__submit {
  width: 100%;
  border: none;
}

.demo-form__submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.demo-form__submit-loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.demo-form__spinner {
  width: 1rem;
  height: 1rem;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.demo-modal__view--success {
  padding: 1rem 0 0.5rem;
}

.demo-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1rem 0.5rem 0.5rem;
}

.demo-success__icon {
  display: grid;
  place-items: center;
  width: 4rem;
  height: 4rem;
  margin-bottom: 1.25rem;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.demo-success__icon svg {
  width: 2rem;
  height: 2rem;
}

.demo-success__title {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.demo-success__message {
  margin: 0 0 0.75rem;
  max-width: 28rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.demo-success__message:last-of-type {
  margin-bottom: 1.75rem;
}

@media (min-width: 480px) {
  .demo-modal__panel {
    padding: 2.25rem 2rem 1.75rem;
  }

  .demo-form__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .demo-form__actions {
    flex-direction: row;
    justify-content: flex-end;
  }

  .demo-form__cancel {
    width: auto;
  }

  .demo-form__submit {
    width: auto;
    min-width: 11rem;
  }
}