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

:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --border: #e2e0d8;
  --border-strong: #c8c6be;
  --text: #1a1a18;
  --text-muted: #6b6b66;
  --text-faint: #a0a09a;
  --accent: #2a5cff;
  --accent-light: #eef1ff;
  --accent-dark: #1a3ecc;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warn-bg: #fffbeb;
  --warn-border: #fcd34d;
  --warn-text: #92400e;
  --radius: 10px;
  --radius-lg: 14px;
}

.page-layout {
  flex: 1;
  padding: 2rem 1rem 3rem;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* ── Sidebar ── */
.sidebar {
  width: 240px;
  position: absolute;
  left: 1rem;
  top: 2rem;
  display: none;
}

.sidebar-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
}

.sidebar-section {
  margin-bottom: 16px;
}

.sidebar-icon {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: #fff8e1;
  border: 1px solid #fcd34d;
  display: flex; align-items: center; justify-content: center;
  color: #b45309;
  margin-bottom: 10px;
}
.sidebar-icon svg { width: 17px; height: 17px; }

.sidebar-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.3;
}

.sidebar-body {
  font-size: 0.775rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.sidebar-body strong { color: var(--text); }

.sidebar-steps-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 10px;
}

.sidebar-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 14px;
}

.sidebar-steps li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.775rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.sidebar-steps li strong { color: var(--text); }
.sidebar-steps li a { color: var(--accent); text-decoration: none; }
.sidebar-steps li a:hover { text-decoration: underline; }

.sidebar-step-num {
  flex-shrink: 0;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}

.sidebar-tip {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 0.72rem;
  color: var(--success);
  font-weight: 500;
  line-height: 1.45;
}
.sidebar-tip svg { width: 13px; height: 13px; flex-shrink: 0; margin-top: 1px; }

/* ── Ad zone (right column) ── */
.ad-zone {
  grid-area: adzone;
  position: sticky;
  top: 2rem;
  align-self: start;
  display: none;
}

.ad-zone-inner {
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 16px;
  min-height: 250px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-faint);
  font-size: 0.72rem;
  text-align: center;
}

.ad-zone-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 2px 8px;
}

/* Show sidebar on wide screens */
@media (min-width: 900px) {
  .sidebar { display: block; }
}
}

/* ── Global footer ── */
.global-footer {
  width: 100%;
  padding: 0 1rem 28px;
  display: flex;
  justify-content: center;
  align-self: stretch;
}

.global-footer-inner {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: var(--text);
  color: #fff;
  border-radius: 99px;
  padding: 10px 20px 10px 14px;
  font-size: 0.78rem;
  font-weight: 500;
  box-shadow: 0 4px 16px -4px rgba(0,0,0,0.22);
}

.footer-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  background: #2665dc;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 99px;
  white-space: nowrap;
  flex-shrink: 0;
}

.footer-badge svg { width: 11px; height: 11px; }

.footer-text { color: rgba(255,255,255,0.72); }
.footer-text strong { color: #fff; font-weight: 700; }

.footer-divider {
  width: 1px; height: 16px;
  background: rgba(255,255,255,0.15);
  flex-shrink: 0;
}

.footer-safe {
  display: flex;
  align-items: center;
  gap: 5px;
  color: #4ade80;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}
.footer-safe svg { width: 13px; height: 13px; }

@media (max-width: 480px) {
  .global-footer-inner {
    flex-direction: column;
    border-radius: 16px;
    text-align: center;
    gap: 10px;
    padding: 14px 18px;
  }
  .footer-divider { width: 40px; height: 1px; }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-layout,
.global-footer {
  width: 100%;
}

.wrap {
  max-width: 600px;
  width: 100%;
}

/* ── Head ── */
.head { margin-bottom: 2rem; }
.head h1 { font-size: clamp(1.2rem, 4vw, 1.5rem); font-weight: 700; letter-spacing: -0.4px; margin-bottom: 4px; }
.head p  { font-size: 0.875rem; color: var(--text-muted); }

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 4vw, 1.5rem);
  margin-bottom: 12px;
}

.hidden { display: none !important; }

.step-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 1rem;
}

/* ── Drop zone ── */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 5vw, 2.5rem) 1rem;
  text-align: center;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.dropzone:hover, .dropzone.over {
  background: var(--accent-light);
  border-color: var(--accent);
}
.dicon {
  width: 40px; height: 40px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
}
.dicon svg { width: 20px; height: 20px; }
.dropzone h2 { font-size: clamp(0.9rem, 3vw, 1rem); font-weight: 600; margin-bottom: 4px; }
.dropzone p  { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 1.25rem; }

/* ── File list ── */
.file-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.file-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  transition: background 0.12s;
}
.file-item:hover { background: #f0f0ee; }
.file-icon {
  width: 32px; height: 32px;
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.file-icon.xlsx { background: #e6f4ea; color: #16a34a; }
.file-icon.csv  { background: #fff3e0; color: #b45309; }
.file-icon.xls  { background: #e6f4ea; color: #16a34a; }
.file-info {
  flex: 1;
  min-width: 0;
}
.file-name {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 1px;
}
.file-remove {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-faint);
  transition: background 0.12s, color 0.12s;
  padding: 0;
}
.file-remove:hover { background: var(--danger-bg); color: var(--danger); }
.file-remove svg { width: 14px; height: 14px; }


.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 1.25rem;
}
.stat {
  background: var(--bg);
  border-radius: var(--radius);
  padding: clamp(10px, 3vw, 14px);
  text-align: center;
}
.stat.ok  { background: var(--success-bg); }
.stat.bad { background: var(--danger-bg); }
.stat .n  { font-size: clamp(1.3rem, 5vw, 1.75rem); font-weight: 700; }
.stat .l  { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-top: 3px; }
.stat.ok  .n { color: var(--success); }
.stat.bad .n { color: var(--danger); }

/* ── Email list ── */
.elist {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1rem;
  max-height: 200px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.elist-hd {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 8px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px;
}
.erow {
  padding: 7px 14px;
  font-size: 0.825rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  word-break: break-all;
}
.erow:last-child { border-bottom: none; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); flex-shrink: 0; }
.emore { color: var(--text-faint); font-style: italic; }

/* ── Labels ── */
.lbl { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); margin-bottom: 6px; }
.mt { margin-top: 14px; }

/* ── Switch guide accordion ── */
.switch-guide {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  overflow: hidden;
}
.switch-guide summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  background: var(--bg);
  list-style: none;
  user-select: none;
  transition: background 0.12s;
}
.switch-guide summary::-webkit-details-marker { display: none; }
.switch-guide summary:hover { background: #eee; }
.switch-guide[open] summary { border-bottom: 1px solid var(--border); }
.guide-chevron { width: 16px; height: 16px; transition: transform 0.2s; flex-shrink: 0; }
.switch-guide[open] .guide-chevron { transform: rotate(180deg); }
.guide-steps {
  list-style: none;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.guide-steps li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.825rem;
  line-height: 1.5;
  color: var(--text);
}
.step-num {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin-top: 1px;
}

/* ── Inputs ── */
input[type="text"], input[type="email"] {
  padding: 9px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
  width: 100%;
}
input[type="text"]:focus, input[type="email"]:focus { border-color: var(--accent); }
.full-input { width: 100%; display: block; }

/* ── Radio ── */
.radio-row {
  display: flex;
  gap: 16px;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  flex-wrap: wrap;
}
.radio-row label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.rec-badge { font-size: 0.65rem; font-weight: 700; background: var(--accent-light); color: var(--accent); padding: 2px 7px; border-radius: 99px; }

.mode-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: -10px;
  margin-bottom: 1.25rem;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mode-hint strong { color: var(--text); }


.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 11px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, transform 0.1s;
  white-space: nowrap;
  touch-action: manipulation;
}
.btn-primary:hover  { background: var(--accent-dark); }
.btn-primary:active { transform: scale(0.98); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 8px 18px;
  font-size: 0.875rem;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
  touch-action: manipulation;
}
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

.send-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.note { font-size: 0.78rem; color: var(--text-faint); }

/* ── Batch links ── */
.batch-wrap {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 10px;
}
.batch-wrap p { font-size: 0.8rem; font-weight: 600; color: var(--success); margin-bottom: 8px; }
.batch-link {
  display: block;
  font-size: 0.875rem;
  color: var(--accent);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 6px;
  transition: background 0.12s;
  word-break: break-word;
}
.batch-link:hover { background: var(--accent-light); }
.batch-link:last-child { margin-bottom: 0; }

/* ── Warning ── */
.warn {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.825rem;
  color: var(--warn-text);
  line-height: 1.5;
}

footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--text-faint);
}
.global-footer {
display: flex;
justify-content: center;
  
}

.btn-signout {
  flex-shrink: 0;
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1px solid var(--success-border);
  background: transparent;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  padding: 0;
}
.btn-signout:hover { background: var(--danger-bg); color: var(--danger); border-color: var(--danger); }
.btn-signout svg { width: 14px; height: 14px; }

/* ── Sign-in Overlay + Modal ── */
.signin-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.signin-overlay.show {
  opacity: 1;
  pointer-events: all;
}
.signin-overlay.hidden { display: none; }

.signin-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 6vw, 44px) clamp(24px, 6vw, 40px);
  text-align: center;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 24px 60px -12px rgba(0,0,0,0.3);
  transform: translateY(16px);
  transition: transform 0.35s ease;
}
.signin-overlay.show .signin-modal {
  transform: translateY(0);
}

.signin-modal-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--accent-light);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
  color: var(--accent);
}
.signin-modal-icon svg { width: 26px; height: 26px; }

.signin-modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
  margin-bottom: 8px;
}

.signin-modal-sub {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 24px;
}

.signin-modal-note {
  margin-top: 20px;
  font-size: 0.72rem;
  color: var(--text-faint);
  line-height: 1.5;
}

/* ── Sending From Box ── */
.sending-from-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--success-bg);
  border: 1.5px solid var(--success-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 16px;
  min-width: 0;
}
.sending-from-box img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.sending-from-box-info {
  flex: 1;
  min-width: 0;
}
.sending-from-label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--success);
  margin-bottom: 2px;
}
.sending-from-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sending-from-email {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ════════════════════════════════ */

/* Tablet: 480px and below */
@media (max-width: 480px) {
  .page-layout { padding: 1.25rem 0.75rem 2rem; }

  .card { padding: 1rem; }

  .head h1 { font-size: 1.25rem; }

  .dropzone { padding: 1.5rem 0.75rem; }

  .stats { gap: 8px; }
  .stat { padding: 10px 6px; }
  .stat .n { font-size: 1.4rem; }
  .stat .l { font-size: 0.6rem; }

  .send-row { flex-direction: column; align-items: stretch; }
  .send-row .btn-primary { width: 100%; text-align: center; }
  .send-row .note { text-align: center; }

  .radio-row { gap: 12px; }

  .signin-card { padding: 24px 16px; }
}

/* Small mobile: 360px and below */
@media (max-width: 360px) {
  .page-layout { padding: 1rem 0.5rem 1.5rem; }

  .card { padding: 0.875rem; border-radius: var(--radius); }

  .stats { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .stat { padding: 8px 4px; }
  .stat .n { font-size: 1.2rem; }
  .stat .l { font-size: 0.55rem; letter-spacing: 0; }

  .dropzone h2 { font-size: 0.875rem; }
  .dropzone p  { font-size: 0.75rem; }

  .erow { font-size: 0.75rem; padding: 6px 10px; }

  .batch-link { font-size: 0.8rem; }

  .sending-from-box img { width: 32px; height: 32px; }
  .sending-from-name { font-size: 0.82rem; }
  .sending-from-email { font-size: 0.72rem; }
}

/* Large screens: handled by .page-layout */
@media (min-width: 640px) {
  /* body padding now managed by .page-layout */
}