/* ============================================================
   app.css — Wi-Fi File Transfer Tool by compressunder.com
   All rules scoped under .app-* prefix to avoid conflicts.
   ============================================================ */

/* Custom Font Integration */
@font-face {
  font-family: 'Nunito Sans';
  src: url('fonts/Geist-Regular.woff2') format('woff2');
  font-weight: normal;
}

@font-face {
  font-family: 'Gabarito';
  src: url('fonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: normal;
}

:root {
  --primary-blue: #0062ff;
  --black: #000000;
  --white: #ffffff;
  --light-blue: #f0f6ff;
  --gray: #e0e0e0;
  --deep-gray: #111111;
  --text-muted: #666666;
  --border-color: #f0f0f0;

  /* Typography scale */
  --font-body: 'Nunito Sans', 'Inter', sans-serif;
  --font-display: 'Gabarito', 'Barlow Condensed', sans-serif;
}

/* ---- RESET (app-scoped) ---- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  background: var(--light-blue);
  color: var(--deep-gray);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   HERO
   ============================================================ */
.app-hero {
  background: var(--black);
  color: var(--white);
  text-align: center;
  padding: 64px 24px 72px;
  position: relative;
  overflow: hidden;
}

.app-hero::before {
  content: '';
  position: absolute;
  top: -60px; left: 50%;
  transform: translateX(-50%);
  width: 700px; height: 340px;
  background: radial-gradient(ellipse at center, rgba(0,98,255,0.28) 0%, transparent 70%);
  pointer-events: none;
}

.app-hero__inner { position: relative; }

.app-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -1px;
  margin: 0 0 18px;
  text-transform: uppercase;
}

.app-hero__sub {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.7);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ============================================================
   MAIN WRAP
   ============================================================ */
.app-wrap {
  max-width: 580px;
  margin: -36px auto 0;
  padding: 0 16px 56px;
}

/* ============================================================
   APP CARD (main widget)
   ============================================================ */
.app-card {
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 6px 40px rgba(0,0,0,0.12);
  border: 1.5px solid var(--border-color);
  padding: 36px 28px 32px;
  position: relative;
}

/* ============================================================
   VIEWS
   ============================================================ */
.app-view { animation: appFadeIn 0.3s ease both; }

@keyframes appFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.app-view__hint {
  text-align: center;
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 0 24px;
  font-weight: 500;
}

.app-view__back { margin-bottom: 22px; }

/* ============================================================
   BUTTONS
   ============================================================ */
.app-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  transition: background 0.15s, transform 0.12s, box-shadow 0.15s;
  padding: 15px 26px;
  white-space: nowrap;
}

.app-btn:active { transform: scale(0.97); }

.app-btn--primary {
  background: var(--primary-blue);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(0,98,255,0.32);
}
.app-btn--primary:hover {
  background: #0051d4;
  box-shadow: 0 6px 20px rgba(0,98,255,0.42);
}

.app-btn--outline {
  background: transparent;
  color: var(--deep-gray);
  border: 2px solid var(--gray);
}
.app-btn--outline:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
}

.app-btn--ghost {
  background: var(--light-blue);
  color: var(--primary-blue);
  border: none;
}
.app-btn--ghost:hover { background: #ddeeff; }

.app-btn--lg { padding: 20px 32px; font-size: 1.25rem; }
.app-btn--full { width: 100%; }

.app-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

/* Back button */
.app-btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 4px 0;
  transition: color 0.15s;
}
.app-btn-back:hover { color: var(--primary-blue); }

/* ============================================================
   MENU BUTTONS
   ============================================================ */
.app-menu-btns {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ============================================================
   SECTIONS INSIDE VIEWS
   ============================================================ */
.app-section { margin-bottom: 24px; }

.app-section__label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-blue);
  margin: 0 0 12px;
  display: block;
}

.app-section__hint {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: -8px 0 14px;
  line-height: 1.55;
}

/* ============================================================
   FILE DROP AREA
   ============================================================ */
.app-file-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 2px dashed var(--gray);
  border-radius: 14px;
  padding: 36px 24px;
  cursor: pointer;
  color: var(--deep-gray);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  transition: border-color 0.2s, background 0.2s;
}
.app-file-drop:hover {
  border-color: var(--primary-blue);
  background: var(--light-blue);
}
.app-file-drop input[type="file"] { display: none; }

/* ============================================================
   FILE LIST
   ============================================================ */
.app-file-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Injected .file-item divs from JS */
.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--light-blue);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  transition: background 0.2s;
}
.file-item .status { color: var(--text-muted); font-size: 0.85rem; }
.file-item.active { background: #e0ecff; border-color: var(--primary-blue); }
.file-item.active .status { color: var(--primary-blue); }
.file-item.done { background: #e6f4ee; border-color: #4caf7d; }
.file-item.done .status { color: #2e7d52; }

/* ============================================================
   QR CODE BLOCK
   ============================================================ */
.app-qr-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px;
  background: var(--light-blue);
  border-radius: 14px;
  border: 1px solid var(--border-color);
}

.app-qr-img {
  padding: 12px;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--gray);
  display: inline-flex;
}

.app-qr-code-label {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.5px;
  color: var(--deep-gray);
}

.app-qr-code-label strong {
  font-family: monospace, 'Courier New', Courier;
  font-size: 1.7rem;
  color: var(--primary-blue);
  letter-spacing: 8px;
  display: inline-block;
  margin-top: 4px;
  font-weight: 700;
}

/* ============================================================
   CODE ROW (receiver)
   ============================================================ */
.app-code-row {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  align-items: stretch;
  flex-wrap: wrap;   /* wraps on very narrow screens */
}

/* FIX: Connect button must never overflow the card */
.app-code-row .app-btn {
  flex-shrink: 0;
  min-width: 0;
  white-space: normal;   /* allow text to wrap inside button if needed */
  word-break: break-word;
  padding: 14px 18px;
  font-size: 0.95rem;
  line-height: 1.2;
}

.app-code-row .app-input {
  min-width: 0;   /* let flexbox shrink the input naturally */
}

.app-input {
  flex: 1;
  border: 1.5px solid var(--gray);
  border-radius: 12px;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 5px;
  color: var(--deep-gray);
  background: var(--white);
  outline: none;
  transition: border-color 0.15s;
}
.app-input:focus { border-color: var(--primary-blue); }
.app-input::placeholder { letter-spacing: 1px; color: var(--text-muted); font-size: 0.95rem; font-weight: 500; }

/* ============================================================
   TRANSFER VIEW
   ============================================================ */
.app-transfer-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.app-transfer-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary-blue);
  animation: appPulse 1.4s ease-in-out infinite;
}

@keyframes appPulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.8); }
}

.app-transfer-status {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Progress Bar */
.app-progress-block { margin-bottom: 24px; }

.app-progress-bar-wrap {
  height: 10px;
  background: var(--gray);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 12px;
}

.app-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-blue), #33aaff);
  border-radius: 999px;
  transition: width 0.2s ease;
}

.app-progress-info {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Injected requirement card */
.requirement-card {
  background: var(--light-blue);
  border-radius: 14px;
  border: 1px solid var(--border-color);
  padding: 18px 20px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--deep-gray);
  margin-top: 18px;
}
.requirement-card p { margin: 0 0 8px; }
.requirement-card p:last-child { margin: 0; }
.requirement-card strong {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.5px;
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--primary-blue);
}
.requirement-card a { color: var(--primary-blue); }

/* ============================================================
   HIDDEN UTILITY
   ============================================================ */
.hidden { display: none !important; }

/* ============================================================
   SECTION SHARED
   ============================================================ */
.app-section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  color: var(--deep-gray);
  text-align: center;
  margin: 0 0 44px;
}

.app-features-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============================================================
   FEATURES SECTION
   ============================================================ */
.app-features-section {
  background: var(--white);
  padding: 80px 0;
  border-top: 1px solid var(--border-color);
}

.app-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
}

.app-feat-card {
  background: var(--light-blue);
  border-radius: 16px;
  padding: 28px 24px;
  border: 1.5px solid var(--border-color);
  transition: border-color 0.2s, transform 0.2s;
}
.app-feat-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
}

.app-feat-icon {
  width: 54px; height: 54px;
  background: var(--white);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary-blue);
  border: 1px solid var(--border-color);
}

.app-feat-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--deep-gray);
  margin: 0 0 10px;
}

.app-feat-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   SITUATIONS SECTION — enlarged and readable
   ============================================================ */
.app-situations-section {
  background: var(--light-blue);
  padding: 80px 0;
  border-top: 1px solid var(--border-color);
}

.app-situations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 900px) {
  .app-situations-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
}

.app-sit-card {
  background: var(--white);
  border-radius: 20px;
  border: 2px solid var(--border-color);
  padding: 32px 28px 28px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.app-sit-card:hover {
  border-color: var(--primary-blue);
  box-shadow: 0 8px 32px rgba(0,98,255,0.10);
}

.app-sit-badge {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--primary-blue);
  margin-bottom: 6px;
  display: block;
}

.app-sit-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--deep-gray);
  margin-bottom: 24px;
  line-height: 1.2;
}

.app-sit-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-sit-diagram {
  width: 100%;
  max-width: 200px;
  margin: 0 auto;
}
.app-sit-diagram img {
  width: 100%;
  border-radius: 10px;
  object-fit: contain;
}

.app-sit-feats {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.app-sit-feat {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--deep-gray);
  line-height: 1.5;
  padding-left: 30px;
  position: relative;
}

.app-sit-feat::before {
  content: '';
  position: absolute;
  left: 0; top: 3px;
  width: 18px; height: 18px;
  border-radius: 50%;
  flex-shrink: 0;
}

.app-sit-feat--yes::before {
  background: var(--primary-blue);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M3 9l4 4 8-8' stroke='%23fff' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
}

.app-sit-feat--no::before {
  background: var(--gray);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cline x1='4' y1='9' x2='14' y2='9' stroke='%23666' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E");
}

/* ============================================================
   PLATFORMS SECTION
   ============================================================ */
.app-platforms-section {
  background: var(--white);
  padding: 80px 0;
  border-top: 1px solid var(--border-color);
}

.app-platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
  list-style: none;
  padding: 0;
  margin-left: 0;
}

.app-plat-card {
  background: var(--deep-gray);
  color: var(--white);
  border-radius: 14px;
  padding: 20px 22px;
  border-left: 4px solid var(--primary-blue);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.app-plat-card strong {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.app-plat-card span {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
}

.app-platforms-note {
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 700px;
  margin: 0 auto;
  font-style: italic;
}

/* ============================================================
   FAQ SECTION
   ============================================================ */
.app-faq-section {
  background: var(--light-blue);
  padding: 80px 0;
  border-top: 1px solid var(--border-color);
}

.app-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-faq-item {
  background: var(--white);
  border-radius: 14px;
  border: 1.5px solid var(--border-color);
  overflow: hidden;
  transition: border-color 0.2s;
}
.app-faq-item[open] { border-color: var(--primary-blue); }

.app-faq-item summary {
  padding: 20px 24px;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  color: var(--deep-gray);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  gap: 16px;
}
.app-faq-item summary::-webkit-details-marker { display: none; }
.app-faq-item summary::after {
  content: '+';
  flex-shrink: 0;
  font-size: 1.5rem;
  color: var(--primary-blue);
  font-weight: 700;
  line-height: 1;
}
.app-faq-item[open] summary::after { content: '−'; }

.app-faq-body {
  padding: 0 24px 22px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ============================================================
   CONCLUSION
   ============================================================ */
.app-conclusion-section {
  background: var(--white);
  padding: 80px 0;
  border-top: 1px solid var(--border-color);
}

.app-conclusion-text {
  max-width: 780px;
  margin: 0 auto;
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.9;
  text-align: center;
}

/* ============================================================
   IN-PAGE NOTICE (from JS showNotice)
   ============================================================ */
#in-page-notice {
  font-family: var(--font-body) !important;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .app-card { padding: 24px 18px 22px; border-radius: 16px; }
  .app-code-row { flex-direction: column; }
  .app-code-row .app-btn { width: 100%; }
  .app-features-grid { grid-template-columns: 1fr 1fr; }
  .app-platforms-grid { grid-template-columns: 1fr 1fr; }
  .app-features-inner { padding: 0 16px; }
  .app-sit-card { padding: 24px 20px; }
}

@media (max-width: 420px) {
  .app-features-grid { grid-template-columns: 1fr; }
  .app-platforms-grid { grid-template-columns: 1fr; }
  .app-btn--lg { font-size: 1.1rem; padding: 18px 24px; }
}