/* =============================================================
   BookLocker — Landing Page
   Aesthetic: Editorial-modern. Dark navy + violet accent.
   Display: Fraunces (serif). Body: Inter Tight.
   ============================================================= */

:root {
  /* Brand colors */
  --navy-950: #0a0e1f;
  --navy-900: #0f1530;
  --navy-800: #161e3f;
  --navy-700: #1f2950;
  --navy-600: #2a3563;
  --navy-500: #3a4677;

  --ink: #e8e6f0;
  --ink-soft: #b6b3c9;
  --ink-dim: #8a8aa3;

  --violet-700: #4c1d95;
  --violet-600: #5b21b6;     /* primary accent */
  --violet-500: #7c3aed;
  --violet-400: #a78bfa;
  --violet-300: #c4b5fd;

  --paper: #f5f1e8;
  --paper-warm: #efe9da;
  --gold: #d4a373;

  /* Spacing scale */
  --max-w: 1200px;
  --pad-x: clamp(1.25rem, 4vw, 3rem);

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", "Palatino", Georgia, serif;
  --font-body: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

  /* Easing */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--navy-950);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
}

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

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

/* =============================================================
   Background atmosphere
   ============================================================= */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at top, black 30%, transparent 70%);
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}
.bg-glow--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--violet-600), transparent 70%);
  top: -200px; left: -200px;
}
.bg-glow--2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #1e3a8a, transparent 70%);
  top: 30%; right: -150px;
}

main, header, footer { position: relative; z-index: 1; }

/* =============================================================
   Nav
   ============================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 14, 31, 0.65);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.nav__brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
  color: white;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 16px -4px rgba(91, 33, 182, 0.5);
}
.nav__brand-mark svg { width: 18px; height: 18px; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: 0.95rem;
}
.nav__links a {
  color: var(--ink-soft);
  transition: color 0.2s var(--ease);
}
.nav__links a:hover { color: var(--ink); }

.nav__cta {
  background: var(--violet-600);
  color: white !important;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  font-weight: 500;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}
.nav__cta:hover {
  background: var(--violet-500);
  transform: translateY(-1px);
}

@media (max-width: 640px) {
  .nav__links a:not(.nav__cta) { display: none; }
}

/* =============================================================
   Eyebrow label
   ============================================================= */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--violet-300);
}
.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet-400);
  box-shadow: 0 0 12px var(--violet-400);
}

/* =============================================================
   Buttons
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.4rem;
  border-radius: 14px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn span {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
  text-align: left;
}
.btn small {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.85;
}
.btn strong {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.btn--primary {
  background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
  color: white;
  box-shadow:
    0 8px 30px -8px rgba(91, 33, 182, 0.6),
    inset 0 1px 0 rgba(255,255,255,0.2);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 14px 40px -10px rgba(91, 33, 182, 0.7),
    inset 0 1px 0 rgba(255,255,255,0.25);
}

.btn--secondary {
  background: rgba(255,255,255,0.05);
  color: var(--ink);
  border-color: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
}
.btn--secondary:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

/* =============================================================
   Hero
   ============================================================= */
.hero {
  padding: clamp(3rem, 8vw, 6rem) var(--pad-x) clamp(4rem, 9vw, 7rem);
  position: relative;
}

.hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

@media (max-width: 880px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
}

.hero__copy {
  animation: fadeRise 0.9s var(--ease) both;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.5rem, 6vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 1.25rem 0 1.5rem;
  color: var(--ink);
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
.hero__title em {
  font-style: italic;
  font-weight: 300;
  background: linear-gradient(135deg, var(--violet-300), var(--violet-400) 60%, var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lede {
  font-size: clamp(1.05rem, 1.5vw, 1.18rem);
  color: var(--ink-soft);
  max-width: 32rem;
  margin: 0 0 2rem;
  line-height: 1.6;
}

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

.hero__meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero__meta-item strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.hero__meta-item span {
  font-size: 0.82rem;
  color: var(--ink-dim);
}
.hero__meta-divider {
  width: 1px;
  height: 28px;
  background: rgba(255,255,255,0.12);
}

/* Hero visual */
.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 540px;
  animation: fadeRise 1.1s 0.15s var(--ease) both;
}

@media (max-width: 880px) {
  .hero__visual { min-height: 500px; }
}

/* =============================================================
   Phone mockup
   ============================================================= */
.phone {
  width: 280px;
  height: 560px;
  background: linear-gradient(160deg, #2a3056, #161a36);
  border-radius: 42px;
  padding: 11px;
  box-shadow:
    0 50px 100px -20px rgba(0,0,0,0.5),
    0 30px 60px -30px rgba(91,33,182,0.3),
    inset 0 0 0 1px rgba(255,255,255,0.08);
  position: relative;
  transform: rotate(-3deg);
  transition: transform 0.5s var(--ease);
}
.phone--hero:hover { transform: rotate(-2deg) translateY(-4px); }

.phone__notch {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 22px;
  background: #0a0e1f;
  border-radius: 999px;
  z-index: 5;
}

.phone__screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #14172e 0%, #0d1023 100%);
  border-radius: 32px;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.phone__statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 26px 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
}
.phone__statusbar-icons { display: flex; gap: 4px; align-items: center; color: var(--ink); }

.phone__app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px 14px;
}
.phone__app-greet {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.phone__app-count {
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-top: 3px;
}
.phone__app-search {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: grid;
  place-items: center;
  color: var(--ink-soft);
}
.phone__app-search svg { width: 14px; height: 14px; }

.phone__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 4px 18px 18px;
  flex: 1;
}

.phone__book {
  background: var(--book-color, var(--violet-600));
  border-radius: 6px;
  padding: 8px 10px 10px 14px;
  display: flex;
  align-items: flex-end;
  position: relative;
  height: 100%;
  min-height: 110px;
  transform: rotate(var(--rotate, 0));
  box-shadow:
    inset 4px 0 8px -4px rgba(0,0,0,0.4),
    0 4px 12px -2px rgba(0,0,0,0.3);
  overflow: hidden;
  transition: transform 0.3s var(--ease);
}
.phone__book::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(180deg, transparent 0 14%, rgba(255,255,255,0.04) 14% 14.5%),
    linear-gradient(135deg, rgba(255,255,255,0.12), transparent 50%);
  pointer-events: none;
}
.phone__book-spine {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: rgba(0,0,0,0.25);
}
.phone__book-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  color: rgba(255,255,255,0.92);
  line-height: 1.2;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

/* Floating cards */
.floating-card {
  position: absolute;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: 0 16px 40px -12px rgba(0,0,0,0.4);
  animation: floatY 4s ease-in-out infinite;
}
.floating-card--loan {
  top: 12%;
  right: -2%;
  animation-delay: 0s;
}
.floating-card--streak {
  bottom: 14%;
  left: -8%;
  animation-delay: 1.5s;
}
@media (max-width: 880px) {
  .floating-card--loan { right: 4%; top: 8%; }
  .floating-card--streak { left: 2%; bottom: 8%; }
}

.floating-card__icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  display: grid;
  place-items: center;
  color: var(--ink);
}
.floating-card__icon svg { width: 18px; height: 18px; }
.floating-card__icon--accent {
  background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
  color: white;
}
.floating-card__label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.floating-card__sub {
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-top: 1px;
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes fadeRise {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =============================================================
   Sections
   ============================================================= */
.section {
  padding: clamp(4rem, 9vw, 7rem) var(--pad-x);
  position: relative;
}

.section__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section__head {
  max-width: 42rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.section__head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 1rem 0 1.25rem;
  color: var(--ink);
}

.section__lede {
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.65;
}

/* =============================================================
   Features grid
   ============================================================= */
.features {
  display: grid;
  /* 3 columns on wide screens (6 cards = perfect 3×2),
     2 columns on tablets, 1 column on mobile */
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 24px;
  overflow: hidden;
}

@media (max-width: 880px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .features { grid-template-columns: 1fr; }
}

.feature {
  background: rgba(15, 21, 48, 0.6);
  padding: 2.25rem 2rem;
  transition: background 0.3s var(--ease);
  position: relative;
}
.feature:hover { background: rgba(31, 41, 80, 0.6); }
.feature:hover .feature__icon {
  background: linear-gradient(135deg, var(--violet-600), var(--violet-500));
  color: white;
  border-color: transparent;
}

.feature__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  display: grid;
  place-items: center;
  color: var(--violet-300);
  margin-bottom: 1.5rem;
  transition: all 0.3s var(--ease);
}
.feature__icon svg { width: 22px; height: 22px; }

.feature__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 0.6rem;
  line-height: 1.25;
}

.feature__desc {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.6;
}

/* =============================================================
   Screenshots
   ============================================================= */
.section--screens {
  background: linear-gradient(180deg, transparent 0%, rgba(91, 33, 182, 0.08) 50%, transparent 100%);
}

.screens {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: end;
  justify-items: center;
  padding: 2rem 0 1rem;
}

@media (max-width: 880px) {
  .screens {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  margin: 0;
  transition: transform 0.4s var(--ease);
}
.screen:hover { transform: translateY(-6px); }

.screen figcaption {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1rem;
  color: var(--ink-soft);
  text-align: center;
}

.phone--screen {
  width: 240px;
  height: 480px;
  transform: rotate(0);
}
.screen--1 .phone--screen { transform: rotate(-2deg); }
.screen--3 .phone--screen { transform: rotate(2deg); }
.screen--featured .phone--screen {
  width: 260px;
  height: 520px;
}

.phone__screen--placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background:
    repeating-linear-gradient(45deg,
      rgba(255,255,255,0.02) 0 12px,
      rgba(255,255,255,0.04) 12px 24px),
    linear-gradient(180deg, #14172e 0%, #0d1023 100%);
}
.phone__placeholder-label {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.phone__placeholder-sub {
  font-size: 0.8rem;
  color: var(--ink-dim);
}

/* =============================================================
   CTA card
   ============================================================= */
.section--cta { padding-bottom: clamp(5rem, 10vw, 8rem); }

.cta-card {
  position: relative;
  border-radius: 28px;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 5vw, 3rem);
  overflow: hidden;
  background: linear-gradient(135deg, #1f2950, #0f1530);
  border: 1px solid rgba(255,255,255,0.08);
  text-align: center;
}
.cta-card__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(91,33,182,0.35), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(124,58,237,0.25), transparent 50%);
  pointer-events: none;
}
.cta-card__content { position: relative; z-index: 1; }
.cta-card__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.85rem, 4vw, 2.8rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.85rem;
}
.cta-card__lede {
  color: var(--ink-soft);
  margin: 0 auto 2rem;
  max-width: 28rem;
  font-size: 1.05rem;
}
.cta-card .hero__cta {
  justify-content: center;
  margin: 0;
}

/* =============================================================
   Footer
   ============================================================= */
.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 2.5rem var(--pad-x);
  background: rgba(0,0,0,0.2);
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}
.footer__links {
  display: flex;
  gap: 1.75rem;
  font-size: 0.9rem;
}
.footer__links a {
  color: var(--ink-soft);
  transition: color 0.2s var(--ease);
}
.footer__links a:hover { color: var(--ink); }
.footer__copy {
  font-size: 0.85rem;
  color: var(--ink-dim);
  margin: 0;
}

@media (max-width: 640px) {
  .footer__inner { justify-content: center; text-align: center; }
}

/* =============================================================
   Reveal-on-scroll
   Note: only hides when .js-enabled is set on <html>, so the
   page is fully visible when JS is disabled or fails to load.
   ============================================================= */
.js-enabled .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.js-enabled .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .js-enabled .reveal { opacity: 1; transform: none; }
}