/* =============================================
   Persista — Premium Landing Page Styles
   ============================================= */

:root {
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --ink: #1d1d1f;
  --ink-secondary: #6e6e73;
  --ink-tertiary: #86868b;
  --surface: #f5f5f7;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --white: #ffffff;
  --border: rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 16px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 2px 20px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-phone: 0 40px 80px -20px rgba(0, 0, 0, 0.25);
  --max-width: 72rem;
  --section-y: 5rem;
  --radius-card: 1.5rem;
  --radius-btn: 9999px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(0, 113, 227, 0.15);
}

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

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

button {
  font: inherit;
  cursor: pointer;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--white);
}

.skip-link:focus {
  left: 1rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.container--narrow {
  max-width: 48rem;
}

.container--cta {
  max-width: 56rem;
}

.section {
  padding-block: var(--section-y);
}

.section--surface {
  background: var(--surface);
}

/* Typography */
.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.headline-xl {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.headline-lg {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.headline-md {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lead {
  margin: 1.5rem 0 0;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.6;
  color: var(--ink-secondary);
}

.body-lg {
  margin: 1.5rem 0 0;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.6;
  color: var(--ink-secondary);
}

.body-md {
  margin: 1rem 0 0;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

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

.text-constrained {
  max-width: 42rem;
  margin-inline: auto;
}

.text-constrained--spaced {
  margin-top: 3rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: transform 0.3s var(--ease-out), background 0.3s, box-shadow 0.3s, color 0.3s;
}

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

.btn--primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.25);
}

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.35);
  transform: translateY(-2px);
}

.btn--secondary {
  background: transparent;
  color: var(--accent);
  box-shadow: inset 0 0 0 1px #d2d2d7;
}

.btn--secondary:hover {
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--ink-tertiary);
}

.btn--white {
  background: var(--white);
  color: var(--ink);
  box-shadow: none;
}

.btn--white:hover {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn--xs {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

/* Navbar */
.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  transition: background 0.5s, border-color 0.5s, backdrop-filter 0.5s;
}

.navbar.is-scrolled {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.navbar__logo {
  font-size: 1.3125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.navbar__links {
  display: none;
  align-items: center;
  gap: 2rem;
}

.navbar__links a:not(.btn) {
  font-size: 0.875rem;
  color: var(--ink-secondary);
  transition: color 0.2s;
}

.navbar__links a:not(.btn):hover {
  color: var(--ink);
}

.navbar__mobile-cta {
  display: inline-flex;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: 7rem;
  padding-bottom: 4rem;
}

.hero__bg {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top, rgba(0, 113, 227, 0.06) 0%, transparent 60%);
}

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

.hero__copy {
  text-align: center;
}

.hero__copy .lead {
  max-width: 32rem;
  margin-inline: auto;
}

/* Phone mockup */
.phone {
  position: relative;
  width: 100%;
  max-width: 280px;
  margin-inline: auto;
}

.phone__glow {
  position: absolute;
  inset: -2rem;
  border-radius: 3rem;
  background: linear-gradient(to bottom, rgba(0, 113, 227, 0.1), transparent);
  filter: blur(48px);
}

.phone__frame {
  position: relative;
  padding: 0.5rem;
  border-radius: 2.75rem;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: var(--ink);
  box-shadow: var(--shadow-phone);
}

.phone__notch {
  position: absolute;
  top: 0.75rem;
  left: 50%;
  z-index: 2;
  width: 90px;
  height: 22px;
  border-radius: 9999px;
  background: #000;
  transform: translateX(-50%);
}

.phone__screen {
  overflow: hidden;
  border-radius: 2.25rem;
  background: var(--white);
}

.phone__status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem 0.25rem;
  font-size: 0.625rem;
  font-weight: 500;
}

.phone__status-icons {
  display: flex;
  gap: 0.25rem;
}

.phone__status-icons span {
  display: block;
  border: 1px solid rgba(29, 29, 31, 0.6);
  border-radius: 2px;
}

.phone__status-icons span:nth-child(1),
.phone__status-icons span:nth-child(2) {
  width: 12px;
  height: 8px;
}

.phone__status-icons span:nth-child(3) {
  width: 20px;
  height: 10px;
}

.phone__content {
  padding: 1rem 1.25rem 2rem;
}

.phone__label {
  margin: 0;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
}

.phone__title {
  margin: 0.25rem 0 0;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.phone__input {
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: 1rem;
  background: var(--surface);
}

.phone__input p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--ink-secondary);
}

.phone__card {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.phone__card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.phone__card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 9999px;
  background: rgba(0, 113, 227, 0.1);
}

.phone__card-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent);
}

.phone__card-action {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.35;
}

.phone__card-time {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  color: var(--ink-tertiary);
}

.phone__card-btn {
  width: 100%;
  margin-top: 1rem;
  padding: 0.625rem;
  border: none;
  border-radius: 0.75rem;
  background: var(--accent);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 500;
}

.phone__streak {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  background: var(--surface);
}

.phone__streak span:first-child {
  font-size: 0.75rem;
  color: var(--ink-secondary);
}

.phone__streak span:last-child {
  font-size: 0.875rem;
  font-weight: 600;
}

/* Cards grid */
.grid {
  display: grid;
  gap: 1rem;
}

.grid--3 {
  gap: 1.5rem;
}

.grid--highlights {
  margin-top: 4rem;
}

.grid--features {
  margin-top: 4rem;
  gap: 1.25rem;
}

.grid--testimonials {
  margin-top: 4rem;
  gap: 1.5rem;
}

/* Card */
.card {
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  background: var(--white);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
}

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

.card--highlight {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  text-align: center;
}

.card--step {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 2rem;
}

.card--feature {
  padding: 1.75rem;
}

.card--feature:hover .card__icon-wrap {
  background: var(--accent);
  color: var(--white);
}

.card--testimonial {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 2rem;
}

.card__step {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--ink-tertiary);
}

.card__icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.5rem;
  border-radius: 1rem;
  background: rgba(0, 113, 227, 0.1);
  color: var(--accent);
  transition: background 0.3s, color 0.3s;
}

.card__icon-wrap--lg {
  width: 3.5rem;
  height: 3.5rem;
}

.card__icon-wrap--md {
  width: 2.75rem;
  height: 2.75rem;
  margin-top: 0;
  border-radius: 0.75rem;
  background: var(--surface);
  color: var(--ink);
}

.card--highlight:hover .card__icon-wrap--lg {
  background: var(--accent);
  color: var(--white);
}

.card__title {
  margin: 1.5rem 0 0;
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.card--feature .card__title {
  margin-top: 1.25rem;
  font-size: 1.0625rem;
}

.card__text {
  margin: 0.75rem 0 0;
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.card--feature .card__text {
  margin-top: 0.5rem;
  font-size: 0.875rem;
}

.card__label {
  margin: 1rem 0 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

/* Testimonials */
.stars {
  display: flex;
  gap: 2px;
}

.stars svg {
  width: 16px;
  height: 16px;
  fill: var(--accent);
}

.testimonial__quote {
  margin: 1.25rem 0 0;
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.testimonial__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  background: rgba(0, 113, 227, 0.1);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

.testimonial__name {
  font-style: normal;
  font-size: 0.875rem;
  font-weight: 600;
}

.testimonial__role {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--ink-tertiary);
}

/* CTA banner */
.cta-banner {
  position: relative;
  overflow: hidden;
  padding: 4rem 2rem;
  border-radius: 2rem;
  background: var(--ink);
  text-align: center;
}

.cta-banner__bg {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(0, 113, 227, 0.3) 0%, transparent 60%);
}

.cta-banner__content {
  position: relative;
}

.cta-banner__title {
  margin: 0;
  color: var(--white);
}

.cta-banner__text {
  max-width: 32rem;
  margin: 1rem auto 0;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
}

.cta-banner .btn-row {
  margin-top: 2rem;
}

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

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer__brand {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 600;
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

.footer__nav a {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  transition: color 0.2s;
}

.footer__nav a:hover {
  color: var(--ink);
}

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

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in--none {
  transform: none;
}

.fade-in--none.is-visible {
  transform: none;
}

/* Responsive */
@media (min-width: 640px) {
  :root {
    --section-y: 7rem;
  }

  .hero {
    padding-top: 9rem;
    padding-bottom: 6rem;
  }

  .btn-row {
    flex-direction: row;
  }

  .phone {
    max-width: 320px;
  }

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

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

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

@media (min-width: 768px) {
  .navbar__links {
    display: flex;
  }

  .navbar__mobile-cta {
    display: none;
  }

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

@media (min-width: 1024px) {
  .container {
    padding-inline: 2rem;
  }

  .hero {
    padding-top: 11rem;
    padding-bottom: 8rem;
  }

  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .hero__copy {
    text-align: left;
  }

  .hero__copy .lead {
    margin-inline: 0;
  }

  .btn-row {
    justify-content: flex-start;
  }

  .grid--highlights {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .cta-banner {
    padding: 5rem 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}