/* ============================================
   Per-App Grayscale — Apple-style petition site
   ============================================ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
  --black: #1d1d1f;
  --white: #f5f5f7;
  --gray-bg: #fbfbfd;
  --dark-bg: #000000;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --text-secondary: #86868b;
  --text-secondary-dark: #a1a1a6;
  --border: rgba(0, 0, 0, 0.08);
  --max-width: 980px;
  --section-padding: 93px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--black);
  background: #fff;
  line-height: 1.5;
  overflow-x: hidden;
}

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

.headline-hero {
  font-size: clamp(40px, 8vw, 80px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
}

.headline-section {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.07;
  letter-spacing: -0.015em;
}

.headline-sub {
  font-size: clamp(19px, 2.5vw, 28px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.body-large {
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.58;
  font-weight: 400;
}

.body-text {
  font-size: 17px;
  line-height: 1.58;
  font-weight: 400;
}

.label-text {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---- Layout ---- */

.section {
  padding: var(--section-padding) 24px;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section--dark {
  background: var(--dark-bg);
  color: #fff;
}

.section--dark .text-secondary {
  color: var(--text-secondary-dark);
}

.section--gray {
  background: var(--gray-bg);
}

.text-secondary {
  color: var(--text-secondary);
}

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

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

.hero {
  padding: 68px 24px 85px;
  text-align: center;
  background: var(--dark-bg);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 830px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero .label-text {
  color: var(--text-secondary-dark);
  margin-bottom: 20px;
}

.hero .headline-hero {
  margin-bottom: 20px;
}

.hero .body-large {
  color: var(--text-secondary-dark);
  max-width: 600px;
  margin: 0 auto 50px;
}

/* Phone mockup — iPhone 15 Pro style */
.phone-mockup {
  position: relative;
  width: 280px;
  margin: 0 auto 50px;
  cursor: pointer;
}

.phone-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1310 / 2836;
  background: #1b1b1b;
  border-radius: 55px;
  border: 2px solid #3a3a3c;
  overflow: visible;
  box-shadow:
    0 0 0 1px #0a0a0a,
    0 30px 80px rgba(0, 0, 0, 0.7),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.phone-screen {
  position: absolute;
  inset: 10px;
  border-radius: 45px;
  overflow: hidden;
  background: #000;
}

.phone-screen img,
.phone-screen svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.phone-screen img.grayscale,
.phone-screen svg.grayscale {
  filter: grayscale(1);
}

/* Dynamic Island */
.phone-dynamic-island {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 25px;
  background: #000;
  border-radius: 20px;
  z-index: 3;
}

/* Hardware buttons */
.phone-btn-right {
  position: absolute;
  right: -4px;
  background: #2a2a2c;
  border-radius: 0 2px 2px 0;
}

.phone-btn-left {
  position: absolute;
  left: -4px;
  background: #2a2a2c;
  border-radius: 2px 0 0 2px;
}

.phone-btn-power {
  top: 28%;
  width: 3px;
  height: 65px;
}

.phone-btn-silent {
  top: 18%;
  width: 3px;
  height: 24px;
}

.phone-btn-volup {
  top: 26%;
  width: 3px;
  height: 45px;
}

.phone-btn-voldn {
  top: 36%;
  width: 3px;
  height: 45px;
}

.phone-label {
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-secondary-dark);
}

.phone-label span {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 20px;
  font-size: 13px;
  transition: all 0.3s ease;
}

/* Toggle indicator */
.toggle-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-secondary-dark);
}

.toggle-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary-dark);
  transition: all 0.3s ease;
}

.toggle-dot.active {
  background: #fff;
  transform: scale(1.3);
}

/* ---- Problem section ---- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
  margin-top: 60px;
}

a.stat-card {
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform 0.2s ease;
}

a.stat-card:hover {
  transform: scale(1.03);
}

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

.stat-number {
  font-size: clamp(48px, 6vw, 72px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.stat-label {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.4;
  max-width: 260px;
  margin: 0 auto;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---- Why not global ---- */

.scenarios {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-top: 50px;
}

.scenario {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
}

.scenario-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.scenario-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scenario-desc {
  font-size: 14px;
  color: var(--text-secondary-dark);
  line-height: 1.5;
}

/* ---- Solution mockup ---- */

/* iOS Settings mockup — matched to real iOS specs */
.settings-mockup {
  max-width: 380px;
  margin: 50px auto 0;
  background: #000;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.settings-header {
  padding: 28px 16px 8px;
  font-size: 13px;
  font-weight: 400;
  color: #8e8e93;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.settings-row {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  background: #1c1c1e;
  gap: 12px;
}

/* Grouped table style — separators inset from icon */
.settings-row + .settings-row {
  border-top: 0.5px solid #38383a;
  margin-left: 0;
}

/* First and last row rounding */
.settings-row:nth-child(2) {
  border-radius: 10px 10px 0 0;
}

.settings-row:last-child {
  border-radius: 0 0 10px 10px;
}

.settings-icon {
  width: 29px;
  height: 29px;
  border-radius: 6.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.settings-label {
  flex: 1;
  font-size: 17px;
  font-weight: 400;
  color: #fff;
  letter-spacing: -0.01em;
  line-height: 22px;
}

.settings-toggle {
  width: 51px;
  height: 31px;
  border-radius: 15.5px;
  position: relative;
  cursor: default;
  flex-shrink: 0;
}

.settings-toggle--on {
  background: #34c759;
}

.settings-toggle--off {
  background: #39393d;
}

.settings-toggle::after {
  content: '';
  position: absolute;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: #fff;
  top: 2px;
  transition: left 0.2s ease;
  box-shadow: 0 0 0 0.5px rgba(0, 0, 0, 0.04), 0 3px 8px rgba(0, 0, 0, 0.15), 0 3px 1px rgba(0, 0, 0, 0.06);
}

.settings-toggle--on::after {
  left: 22px;
}

.settings-toggle--off::after {
  left: 2px;
}

/* ---- Research ---- */

.research-list {
  margin-top: 50px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.research-item {
  border-left: 3px solid var(--accent);
  padding-left: 24px;
}

.research-quote {
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.5;
  font-weight: 500;
  margin-bottom: 8px;
}

.research-source {
  font-size: 14px;
  color: var(--text-secondary);
}

.research-source a {
  color: var(--accent);
  text-decoration: none;
}

.research-source a:hover {
  text-decoration: underline;
}

/* ---- Workaround ---- */

.workaround-problems {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.problem-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.problem-x {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #ff3b30;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  margin-top: 2px;
}

.problem-text {
  font-size: 17px;
  line-height: 1.5;
}

/* ---- Petition form ---- */

.petition {
  padding: var(--section-padding) 24px;
  background: var(--dark-bg);
  color: #fff;
}

.petition-inner {
  max-width: 580px;
  margin: 0 auto;
  text-align: center;
}

.petition .headline-section {
  margin-bottom: 16px;
}

.petition .body-large {
  color: var(--text-secondary-dark);
  margin-bottom: 50px;
}

.signature-count {
  margin-bottom: 40px;
}

.count-number {
  font-size: clamp(48px, 6vw, 72px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #a1a1a6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.count-label {
  font-size: 15px;
  color: var(--text-secondary-dark);
  margin-top: 8px;
}

.petition-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.form-row {
  display: flex;
  gap: 14px;
}

.form-input {
  flex: 1;
  padding: 16px 20px;
  font-size: 17px;
  font-family: var(--font);
  border: none;
  border-radius: 12px;
  background: #1c1c1e;
  color: #fff;
  outline: none;
  transition: box-shadow 0.2s ease;
}

.form-input::placeholder {
  color: #636366;
}

.form-input:focus {
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.4);
}

.btn-sign {
  padding: 18px 32px;
  font-size: 17px;
  font-weight: 600;
  font-family: var(--font);
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

.btn-sign:hover {
  background: var(--accent-hover);
}

.btn-sign:active {
  transform: scale(0.98);
}

.btn-sign:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-note {
  font-size: 13px;
  color: #636366;
  margin-top: 4px;
}

.form-success {
  display: none;
  padding: 20px;
  background: rgba(52, 199, 89, 0.1);
  border: 1px solid rgba(52, 199, 89, 0.3);
  border-radius: 12px;
  color: #34c759;
  font-size: 17px;
  font-weight: 500;
}

.form-success.visible {
  display: block;
}

/* ---- Action list ---- */

.action-cards {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.action-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 28px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  text-align: left;
}

.action-number {
  flex-shrink: 0;
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.action-card p {
  font-size: 21px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.92);
}

.action-card a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.action-card a:hover {
  color: #fff;
}

/* ---- Share ---- */

.share-section {
  padding: 60px 24px;
  text-align: center;
  background: #000;
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.petition .share-buttons {
  justify-content: center;
  margin-top: 16px;
}

.share-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 980px;
  background: transparent;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-share:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-share svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

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

.footer {
  padding: 40px 24px;
  text-align: center;
  background: #000;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer p {
  font-size: 18px;
  color: #636366;
  line-height: 1.6;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

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

/* ---- Rainbow fade headline ---- */
.rainbow-fade {
  background: linear-gradient(
    90deg,
    #ff3b30, #ff9500, #ffcc00, #34c759, #007aff, #5856d6, #af52de, #ff2d55
  );
  background-size: 100% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: filter 3s ease;
}

.rainbow-fade.faded {
  filter: grayscale(1) brightness(0.2);
}

/* ---- Scroll animations ---- */

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ---- Responsive ---- */

@media (max-width: 600px) {
  :root {
    --section-padding: 60px;
  }

  .hero {
    padding: 51px 20px 60px;
  }

  .phone-mockup {
    width: 220px;
  }

  .form-row {
    flex-direction: column;
  }

  .stats-grid {
    gap: 32px;
  }

  .scenarios {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .phone-screen img {
    transition: none;
  }
}