/* ============================================================
   ShareDrop — QR-centric file sharing
   ============================================================ */

[data-theme="light"] {
  --bg: #F9F7F7;
  --bg-card: #ffffff;
  --bg-input: #DBE2EF;
  --bg-hover: #cdd6e8;
  --accent: #3F72AF;
  --accent-hover: #345f96;
  --accent-soft: rgba(63,114,175,0.08);
  --accent-glow: rgba(63,114,175,0.15);
  --green: #22c55e;
  --green-soft: rgba(34,197,94,0.08);
  --red: #ef4444;
  --orange: #f59e0b;
  --text: #112D4E;
  --text-secondary: #3a5070;
  --text-muted: #7a8da6;
  --border: rgba(17,45,78,0.10);
  --border-hover: rgba(17,45,78,0.18);
  --shadow-sm: 0 1px 3px rgba(17,45,78,0.05);
  --shadow-md: 0 2px 10px rgba(17,45,78,0.07);
  --shadow-lg: 0 4px 24px rgba(17,45,78,0.10);
  --qr-dot: #112D4E;
  --qr-bg: #ffffff;
}

[data-theme="dark"] {
  --bg: #222831;
  --bg-card: #2c3340;
  --bg-input: #393E46;
  --bg-hover: #434a55;
  --accent: #00ADB5;
  --accent-hover: #009da5;
  --accent-soft: rgba(0,173,181,0.10);
  --accent-glow: rgba(0,173,181,0.22);
  --green: #4ade80;
  --green-soft: rgba(74,222,128,0.10);
  --red: #f87171;
  --orange: #fbbf24;
  --text: #EEEEEE;
  --text-secondary: #b8bcc4;
  --text-muted: #7a808a;
  --border: rgba(238,238,238,0.08);
  --border-hover: rgba(238,238,238,0.14);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 2px 10px rgba(0,0,0,0.25);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.35);
  --qr-dot: #EEEEEE;
  --qr-bg: #2c3340;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans JP', 'Inter', -apple-system, sans-serif;
  background: var(--bg); color: var(--text);
  min-height: 100vh; display: flex; flex-direction: column;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
  line-height: 1.8;
}
.container { max-width: 480px; margin: 0 auto; padding: 0 20px; width: 100%; }
a { color: var(--accent); text-decoration: none; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-card); border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; height: 52px;
}
.header-right { display: flex; align-items: center; gap: 8px; }
.logo { display: flex; align-items: center; gap: 7px; font-size: 1.05rem; font-weight: 800; text-decoration: none; }
.logo-icon { color: var(--accent); font-size: 0.95rem; }
.logo-accent { color: var(--accent); }
.theme-toggle, .pwa-install {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 9px;
  color: var(--text-secondary); cursor: pointer;
  font-family: inherit; font-size: 0.75rem; font-weight: 700;
  transition: all 0.2s;
  display: flex; align-items: center; gap: 4px;
}
.theme-toggle:hover, .pwa-install:hover { color: var(--accent); border-color: var(--accent); }

/* Main */
.main { flex: 1; padding: 24px 0 36px; }

/* Hero */
.hero { text-align: center; margin-bottom: 16px; }
.hero-title { font-size: 1.3rem; font-weight: 800; line-height: 1.5; }
.hero-accent { color: var(--accent); }
.hero-sub { margin-top: 2px; font-size: 0.82rem; color: var(--text-secondary); }

/* Mode Tabs */
.mode-tabs {
  display: flex; gap: 4px; margin-bottom: 14px;
  background: var(--bg-input); border-radius: 10px; padding: 4px;
}
.mode-tab {
  flex: 1; padding: 9px; border: none; border-radius: 8px;
  background: transparent; color: var(--text-muted);
  font-family: inherit; font-size: 0.85rem; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.mode-tab i {
  font-size: 0.95rem;
}
.mode-tab.active {
  background: var(--bg-card); color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.mode-tab.active i {
  color: var(--accent);
}

/* Card */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px; box-shadow: var(--shadow-md);
}

.share-target-status {
  display: none;
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  align-items: center;
  gap: 7px;
}

.share-target-status.show {
  display: flex;
}

.share-target-status.waiting {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
}

.share-target-status.success {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid rgba(34,197,94,0.35);
}

.share-target-status.error {
  background: rgba(239,68,68,0.08);
  color: var(--red);
  border: 1px solid rgba(239,68,68,0.35);
}

/* Drop Zone */
.drop-zone {
  border: 2px dashed var(--border); border-radius: 12px;
  padding: 32px 20px; text-align: center;
  transition: all 0.25s; cursor: pointer;
  position: relative;
  display: none;
}
.drop-zone.show {
  display: block;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent); background: var(--accent-soft);
}
.drop-zone-icon { font-size: 1.8rem; color: var(--accent); margin-bottom: 6px; }
.drop-zone-text { font-size: 0.88rem; color: var(--text-secondary); font-weight: 600; }
.drop-zone-hint { font-size: 0.73rem; color: var(--text-muted); margin-top: 3px; }
.drop-zone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
}

/* Progress */
.progress-wrap { display: none; }
.progress-bar-bg {
  width: 100%; height: 5px; background: var(--bg-input);
  border-radius: 3px; overflow: hidden;
}
.progress-bar {
  height: 100%; background: var(--accent); border-radius: 3px;
  width: 0; transition: width 0.3s;
}
.progress-text {
  font-size: 0.76rem; color: var(--text-muted); margin-top: 5px;
  display: flex; justify-content: space-between;
}

/* ========= QR Result (MAIN FOCUS) ========= */
.qr-result { display: none; text-align: center; }
.qr-instruction {
  font-size: 0.85rem; color: var(--green); font-weight: 700;
  display: flex; align-items: center; justify-content: center; gap: 5px;
  margin-bottom: 16px;
}
.qr-card {
  display: inline-block;
  padding: 36px 40px;
  background: var(--qr-bg);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  transition: transform 0.3s;
  margin: 0 auto;
  max-width: 100%;
}
.qr-card:hover {
  transform: scale(1.02);
}
.qr-card canvas {
  display: block;
  border-radius: 12px;
  width: 100%;
  max-width: 280px;
  height: auto;
  aspect-ratio: 1 / 1;
}
.qr-code-number {
  margin-top: 18px;
  font-family: 'Inter', monospace;
  font-size: 1.25rem; font-weight: 800; letter-spacing: 0.3em;
  color: var(--text);
  background: var(--accent-soft);
  padding: 12px 20px;
  border-radius: 10px;
  display: inline-block;
}
.qr-code-number::before {
  content: "コード: ";
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 4px;
}
.qr-meta {
  display: flex; justify-content: center; gap: 18px;
  margin-top: 10px; font-size: 0.75rem; color: var(--text-muted); flex-wrap: wrap;
}

.file-info {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; background: var(--accent-soft);
  border-radius: 8px;
}
.file-info-icon { color: var(--accent); font-size: 1.1rem; }
.file-info-name {
  font-size: 0.82rem; font-weight: 700; color: var(--text);
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.file-info-size { font-size: 0.72rem; color: var(--text-muted); white-space: nowrap; }

.qr-actions {
  display: flex; flex-direction: column; gap: 8px; margin-top: 16px;
}

.btn-share {
  padding: 10px 18px; border: none; border-radius: 10px;
  background: var(--accent); color: #fff;
  font-family: inherit; font-size: 0.9rem; font-weight: 700;
  cursor: pointer; box-shadow: 0 1px 8px var(--accent-glow);
  transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
}
.btn-share:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-share:active { transform: translateY(0); }

.btn-copy-link {
  padding: 9px 18px; border: 1px solid var(--border);
  border-radius: 10px; background: var(--bg-card);
  color: var(--text-secondary); font-family: inherit;
  font-size: 0.88rem; font-weight: 700; cursor: pointer;
  transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
}
.btn-copy-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-another {
  padding: 8px 16px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg-input);
  color: var(--text-secondary); font-family: inherit;
  font-size: 0.82rem; font-weight: 700; cursor: pointer;
  transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 5px; justify-content: center;
  margin: 0 auto;
}
.btn-another:hover { border-color: var(--accent); color: var(--accent); }

/* ========= Receive Panel ========= */
.receive-desc {
  font-size: 0.85rem; color: var(--text-secondary);
  margin-bottom: 12px; text-align: center;
}
.code-input-wrap { display: flex; justify-content: center; }
.code-input {
  width: 100%; max-width: 220px; padding: 12px;
  text-align: center; font-size: 2rem; font-weight: 800;
  letter-spacing: 0.4em; font-family: 'Inter', monospace;
  background: var(--bg-input); border: 2px solid var(--border);
  border-radius: 10px; color: var(--text);
  outline: none; transition: border-color 0.2s;
}
.code-input:focus { border-color: var(--accent); }
.code-input::placeholder { color: var(--text-muted); font-size: 1rem; letter-spacing: 0.1em; }

.btn-receive {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; max-width: 220px; margin: 10px auto 0;
  padding: 12px 20px; border: none; border-radius: 10px;
  background: var(--accent); color: #fff;
  font-family: inherit; font-size: 0.92rem; font-weight: 700;
  cursor: pointer; box-shadow: 0 1px 8px var(--accent-glow);
  transition: all 0.2s;
}
.btn-receive:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-receive:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.receive-error {
  margin-top: 8px; font-size: 0.8rem; color: var(--red);
  font-weight: 600; min-height: 1.2em; text-align: center;
}

/* ========= Preview Result ========= */
.preview-result { display: none; }
.image-preview-wrap {
  display: flex; justify-content: center; overflow: hidden;
  background: var(--bg-input); border-radius: 12px;
  padding: 12px; max-height: 400px;
}
.image-preview {
  max-width: 100%; max-height: 380px; object-fit: contain;
  border-radius: 8px;
}

.download-result { display: none; margin-top: 12px; }
.download-success {
  font-size: 0.85rem; font-weight: 700; color: var(--green);
  display: flex; align-items: center; justify-content: center; gap: 5px;
  margin-bottom: 6px;
}

/* Storage warning */
.storage-warning {
  display: none; padding: 8px 12px; margin-bottom: 12px;
  border-radius: 8px; font-size: 0.78rem; font-weight: 600;
  border: 1px solid;
}
.storage-warning.warn {
  display: block; background: rgba(245,158,11,0.08);
  border-color: var(--orange); color: var(--orange);
}
.storage-warning.blocked {
  display: block; background: rgba(239,68,68,0.08);
  border-color: var(--red); color: var(--red);
}

/* Footer */
.footer {
  padding: 14px 0; border-top: 1px solid var(--border); background: var(--bg-card);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.73rem; color: var(--text-muted); font-weight: 500;
}
.footer a { color: var(--text-muted); font-size: 0.7rem; text-decoration: none; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; left: 50%;
  transform: translateX(-50%) translateY(70px);
  background: var(--bg-card); border: 1.5px solid var(--green);
  border-radius: 8px; padding: 8px 16px;
  display: flex; align-items: center; gap: 7px;
  box-shadow: var(--shadow-md); z-index: 300;
  transition: transform 0.3s ease;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast-icon { color: var(--green); font-size: 0.9rem; }
.toast-msg { font-size: 0.82rem; font-weight: 700; }

/* Animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.3s ease; }

/* Responsive */
@media (max-width: 500px) {
  .hero-title { font-size: 1.15rem; }
  .footer-inner { flex-direction: column; gap: 3px; text-align: center; }
  
  .qr-card {
    padding: 20px 24px;
  }
  .qr-card canvas {
    max-width: 240px;
  }
  .qr-code-number {
    font-size: 1rem;
    padding: 10px 16px;
  }
}