/* ============================================================
   Keepsake — Landing page styles
   Apple-esque restraint: generous whitespace, two font weights,
   minimal color, no gradients or shadows.
   ============================================================ */

:root {
  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Source Serif 4', Georgia, serif;

  /* Color — light mode */
  --color-bg: #ffffff;
  --color-bg-subtle: #f7f6f3;
  --color-bg-info: #e6f1fb;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-text-tertiary: #9a9a9a;
  --color-text-info: #0c447c;
  --color-border: rgba(0, 0, 0, 0.1);
  --color-border-strong: rgba(0, 0, 0, 0.2);
  --color-border-info: #378add;

  /* Layout */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --container-max: 1080px;
  --container-narrow: 640px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0e0e0e;
    --color-bg-subtle: #1a1a1a;
    --color-bg-info: #0c2845;
    --color-text: #f0f0ed;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #6a6a6a;
    --color-text-info: #85b7eb;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-strong: rgba(255, 255, 255, 0.2);
    --color-border-info: #378add;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ----- Utilities ----- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ----- Typography ----- */

h1, h2, h3 {
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  color: var(--color-text);
}

h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.1;
}

h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  line-height: 1.2;
}

h3 {
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1rem;
  color: var(--color-text-secondary);
}

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

.eyebrow {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 1.5rem;
}

.pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  padding: 6px 14px;
  border-radius: 999px;
  margin: 0 0 1.5rem;
}

/* ----- Buttons ----- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.btn:hover { opacity: 0.85; }
.btn:active { transform: scale(0.98); }

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
}

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

.btn--ghost:hover {
  background: var(--color-bg-subtle);
  opacity: 1;
}

.btn--sm {
  padding: 10px 16px;
  font-size: 14px;
}

.btn--block {
  width: 100%;
  margin-top: 16px;
}

/* ----- Signed-in banner ----- */

.signed-in-banner {
  background: var(--color-bg-info);
  border-bottom: 1px solid var(--color-border-info);
  color: var(--color-text-info);
  font-size: 14px;
}

.signed-in-banner__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 24px;
}

.signed-in-banner__msg {
  flex: 1;
}

.signed-in-banner__close {
  background: transparent;
  border: none;
  color: inherit;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.signed-in-banner__close:hover,
.signed-in-banner__close:focus-visible {
  background: color-mix(in srgb, var(--color-border-info) 20%, transparent);
}

/* ----- Nav ----- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  max-width: var(--container-max);
  margin: 0 auto;
  gap: 24px;
}

.nav__brand {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.nav__links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  margin-right: auto;
}

.nav__links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

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

@media (max-width: 640px) {
  .nav__links { display: none; }
}

/* ----- Hero ----- */

.hero {
  text-align: center;
  padding: 80px 0 100px;
}

.hero__title {
  margin: 0 0 1.25rem;
}

.hero__sub {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin: 0 auto 2.5rem;
  max-width: 520px;
}

.hero__cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.hero__fineprint {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin: 0;
}

/* ----- Quote beat ----- */

.quote {
  text-align: center;
  padding: 60px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.quote__text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(20px, 2.5vw, 26px);
  line-height: 1.4;
  color: var(--color-text);
  max-width: 580px;
  margin: 0 auto 1rem;
  padding: 0;
  quotes: none;
}

.quote__attr {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ----- Sections ----- */

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

.section-header h2 {
  margin-bottom: 0.5rem;
}

.section-header p {
  font-size: 16px;
  margin: 0;
}

/* ----- Features grid ----- */

.features {
  padding: 100px 0;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid--features {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.card__icon {
  color: var(--color-text);
  margin-bottom: 18px;
  display: inline-flex;
}

.card h3 {
  margin: 0 0 8px;
}

.card p {
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

/* ----- Promise ----- */

.promise {
  background: var(--color-bg-subtle);
  padding: 100px 0;
  text-align: center;
}

.promise h2 {
  max-width: 560px;
  margin: 0 auto 1.25rem;
}

.promise p {
  font-size: 17px;
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto;
}

/* ----- Tour / device mockup ----- */

.tour {
  padding: 100px 0;
}

.device-frame {
  background: var(--color-bg-subtle);
  border-radius: var(--radius-xl);
  padding: 60px 24px;
  display: flex;
  justify-content: center;
}

.device {
  width: 320px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 36px;
  padding: 20px;
}

.device__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.device__day {
  font-size: 11px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 2px;
}

.device__title {
  font-size: 18px;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.01em;
}

.device__capture {
  background: transparent;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}

.device__capture:hover {
  background: var(--color-bg-subtle);
}

.device__photo {
  background: var(--color-bg-subtle);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--color-text-tertiary);
  margin-bottom: 14px;
  padding: 0;
  width: 100%;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color 120ms ease, background-color 120ms ease;
  font: inherit;
}

.device__photo:hover,
.device__photo:focus-visible {
  border-color: var(--color-border-strong);
  background: color-mix(in srgb, var(--color-bg-subtle) 70%, transparent);
}

.device__photo:focus-visible {
  outline: 2px solid var(--color-border-info);
  outline-offset: 2px;
}

.device__photo-hint {
  font-size: 12px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.02em;
}

.device__photo-img {
  display: none;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.device__photo--filled {
  border-style: solid;
  border-color: transparent;
}

.device__photo--filled .device__photo-icon,
.device__photo--filled .device__photo-hint {
  display: none;
}

.device__photo--filled .device__photo-img {
  display: block;
}

.device__caption {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  margin: 0 0 14px;
}

.device__tags {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.tag {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.tag--info {
  background: var(--color-bg-info);
  color: var(--color-text-info);
}

.device__footer {
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
  display: flex;
  gap: 16px;
  align-items: center;
}

.device__meta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ----- Pricing ----- */

.pricing {
  background: var(--color-bg-subtle);
  padding: 100px 0;
}

.grid--pricing {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card--pricing {
  display: flex;
  flex-direction: column;
  position: relative;
}

.card--featured {
  border-color: var(--color-border-info);
  border-width: 2px;
  padding-top: 32px;
}

.card__badge {
  position: absolute;
  top: -12px;
  left: 28px;
  background: var(--color-bg-info);
  color: var(--color-text-info);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.card__label {
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 8px;
  font-weight: 500;
}

.card__price {
  font-size: 32px;
  font-weight: 500;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.card__price-unit {
  font-size: 14px;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.card__desc {
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
  flex-grow: 1;
}

/* ----- Final CTA ----- */

.cta {
  text-align: center;
  padding: 120px 0;
}

.cta h2 {
  max-width: 480px;
  margin: 0 auto 1rem;
}

.cta p {
  font-size: 17px;
  max-width: 460px;
  margin: 0 auto 2rem;
}

.cta__form {
  display: flex;
  gap: 8px;
  max-width: 440px;
  margin: 0 auto 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.cta__form input {
  flex: 1;
  min-width: 200px;
  padding: 14px 18px;
  font-family: inherit;
  font-size: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.cta__form input:focus {
  outline: none;
  border-color: var(--color-border-strong);
}

.cta__fineprint {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin: 0;
}

.cta__result {
  margin: 12px 0 0;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  text-align: center;
}

.cta__result--ok {
  background: var(--color-bg-info);
  border: 1px solid var(--color-border-info);
  color: var(--color-text-info);
}

.cta__result--err {
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.35);
  color: #b91c1c;
}

/* ----- Footer ----- */

.footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
}

.footer__grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.footer__brand {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 4px;
}

.footer__tag {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
}

.footer nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer nav a {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

.footer nav a:hover {
  color: var(--color-text);
}

.footer__copy {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin: 0;
}

/* ----- Sign-in modal ----- */

.signin-modal {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  padding: 28px 28px 24px;
  width: min(420px, calc(100vw - 32px));
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.18);
}

.signin-modal::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

.signin-modal__close-form {
  margin: 0;
  display: flex;
  justify-content: flex-end;
}

.signin-modal__close {
  background: transparent;
  border: 0;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 6px;
}

.signin-modal__close:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text);
}

.signin-modal__title {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 600;
}

.signin-modal__sub {
  margin: 0 0 18px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.signin-modal__form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.signin-modal__label {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.signin-modal__form input[type="email"] {
  padding: 12px 14px;
  font-family: inherit;
  font-size: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.signin-modal__form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-border-strong);
}

.signin-modal__buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

.signin-modal__footnote {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  text-align: center;
}

.signin-modal__link {
  background: none;
  border: 0;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  font: inherit;
  text-decoration: underline;
}

/* ----- Reduced motion ----- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}