/* ═══════════════════════════════════════════════════════════════════════════════
   MailCandid — Stylesheet
   Design : Modern, Clean, Professional
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ── Reset & Base ─────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #3730a3;
  --primary-bg: #eef2ff;

  --success: #10b981;
  --success-light: #34d399;
  --success-bg: #ecfdf5;

  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --warning-bg: #fffbeb;

  --danger: #ef4444;
  --danger-light: #f87171;
  --danger-bg: #fef2f2;

  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15), 0 8px 24px rgba(0,0,0,0.08);
  --transition: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-800);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Scrollbar ─────────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* ═══════════════════════════════════ HEADER ══════════════════════════════════════ */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: white;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--gray-400);
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* Header Stats */
.header-stats {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.stat-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 500;
}

.stat-badge.pending { background: var(--warning-bg); color: #92400e; }
.stat-badge.sent    { background: var(--success-bg); color: #065f46; }
.stat-badge.total   { background: var(--primary-bg); color: var(--primary-dark); }

.stat-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.stat-badge.pending .stat-dot { background: var(--warning); }
.stat-badge.sent    .stat-dot { background: var(--success); }
.stat-badge.total   .stat-dot { background: var(--primary); }

/* ═══════════════════════════════════ MAIN ════════════════════════════════════════ */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

/* ═══════════════════════════════════ UPLOAD ═════════════════════════════════════ */
.upload-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 200px);
}

.upload-card {
  background: white;
  border: 2.5px dashed var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 4rem 3rem;
  text-align: center;
  max-width: 540px;
  width: 100%;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.upload-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79,70,229,0.03) 0%, rgba(99,102,241,0.03) 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.upload-card:hover,
.upload-card.drag-over {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(99,102,241,0.1), var(--shadow);
  transform: translateY(-2px);
}

.upload-card:hover::before,
.upload-card.drag-over::before {
  opacity: 1;
}

.upload-card.drag-over {
  border-color: var(--primary);
  background: var(--primary-bg);
}

.upload-icon {
  width: 96px;
  height: 96px;
  background: linear-gradient(135deg, var(--primary-bg) 0%, #e0e7ff 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--primary);
  transition: transform var(--transition);
}

.upload-card:hover .upload-icon {
  transform: scale(1.05);
}

.upload-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.upload-subtitle {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.upload-subtitle strong {
  color: var(--gray-700);
}

.btn-browse {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 12px rgba(79,70,229,0.3);
  font-family: var(--font);
}

.btn-browse:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79,70,229,0.35);
}

.btn-browse:active { transform: translateY(0); }

.upload-hint {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--gray-400);
}

/* Upload progress */
.upload-progress {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 500;
}

.upload-progress.visible { display: flex; }

.progress-spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--primary-bg);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════ CONTACTS ═══════════════════════════════════ */
.contacts-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-800);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 3px;
  gap: 2px;
}

.filter-tab {
  padding: 0.35rem 0.9rem;
  border: none;
  background: transparent;
  border-radius: calc(var(--radius) - 2px);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.filter-tab.active {
  background: white;
  color: var(--gray-800);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.filter-tab:hover:not(.active) {
  color: var(--gray-700);
}

/* Search Bar */
.search-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: white;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0.65rem 1rem;
  margin-bottom: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  color: var(--gray-400);
}

.search-bar:focus-within {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
  color: var(--primary);
}

.search-bar input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 0.9rem;
  color: var(--gray-700);
  font-family: var(--font);
  background: transparent;
}

.search-bar input::placeholder {
  color: var(--gray-400);
}

/* ── Contact Grid ──────────────────────────────────────────────────────────────── */
.contacts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

/* ── Contact Card ──────────────────────────────────────────────────────────────── */
.contact-card {
  background: white;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  position: relative;
  overflow: hidden;
}

.contact-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.contact-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}

.contact-card:hover::after { opacity: 1; }

.contact-card.status-sent {
  border-color: var(--success);
  background: linear-gradient(135deg, white 0%, var(--success-bg) 100%);
}

.contact-card.status-sent::after {
  opacity: 1;
  background: linear-gradient(90deg, var(--success), var(--success-light));
}

/* Card Header Row */
.card-header-row {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
}

.card-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary-bg) 0%, #e0e7ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.contact-card.status-sent .card-avatar {
  background: var(--success-bg);
  color: var(--success);
}

.card-info {
  flex: 1;
  min-width: 0;
}

.card-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-structure {
  font-size: 0.78rem;
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Status Badge on card */
.card-status {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.6rem;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 600;
  flex-shrink: 0;
}

.card-status.pending {
  background: var(--warning-bg);
  color: #92400e;
}

.card-status.sent {
  background: var(--success-bg);
  color: #065f46;
}

.card-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.card-status.pending .card-status-dot { background: var(--warning); }
.card-status.sent    .card-status-dot { background: var(--success); animation: pulse-dot 1.5s ease infinite; }

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

/* Research Tag on Card */
.card-research {
  font-size: 0.75rem;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 0.25rem 0.6rem;
  border-radius: 99px;
  font-weight: 500;
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Email on card */
.card-email {
  font-size: 0.78rem;
  color: var(--gray-400);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Preview button hint */
.card-preview-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--primary);
  font-weight: 500;
  opacity: 0;
  transition: opacity var(--transition);
  border-top: 1px solid var(--gray-100);
  padding-top: 0.75rem;
}

.contact-card:hover .card-preview-hint { opacity: 1; }

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--gray-400);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

/* ═══════════════════════════════════ BUTTONS ════════════════════════════════════ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border: none;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 3px 10px rgba(79,70,229,0.25);
  font-family: var(--font);
  white-space: nowrap;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(79,70,229,0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: white;
  color: var(--gray-600);
  border: 1.5px solid var(--gray-200);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
  white-space: nowrap;
}

.btn-secondary:hover {
  border-color: var(--gray-300);
  background: var(--gray-50);
  color: var(--gray-700);
}

/* Modal buttons */
.btn-success {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: linear-gradient(135deg, #059669 0%, var(--success) 100%);
  color: white;
  border: none;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 3px 10px rgba(16,185,129,0.25);
  font-family: var(--font);
}

.btn-success:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(16,185,129,0.3);
}

.btn-warning {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--warning-bg);
  color: #92400e;
  border: 1.5px solid #fde68a;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.btn-warning:hover {
  background: #fef3c7;
  border-color: var(--warning);
  transform: translateY(-1px);
}

.btn-warning.editing {
  background: var(--primary-bg);
  color: var(--primary-dark);
  border-color: #a5b4fc;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: transparent;
  color: var(--gray-500);
  border: 1.5px solid var(--gray-200);
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.btn-ghost:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
  color: var(--gray-700);
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--danger-bg);
  color: #991b1b;
  border: 1.5px solid #fecaca;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.btn-danger:hover {
  background: #fee2e2;
  border-color: var(--danger);
  transform: translateY(-1px);
}

button:active { transform: translateY(0) !important; }

/* ═══════════════════════════════════ MODAL ══════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: white;
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  transform: translateY(16px) scale(0.98);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  opacity: 0;
  overflow: hidden;
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.modal-small {
  max-width: 440px;
}

/* Modal Header */
.modal-header {
  padding: 1.5rem 1.5rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-shrink: 0;
}

.modal-contact-info {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.modal-avatar {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(79,70,229,0.25);
  letter-spacing: 0.03em;
}

.modal-contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.modal-contact-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.modal-contact-meta {
  font-size: 0.8rem;
  color: var(--gray-400);
}

.modal-email-link {
  font-size: 0.82rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.modal-email-link:hover { text-decoration: underline; }

.modal-close-btn {
  background: var(--gray-100);
  border: none;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--gray-500);
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.modal-close-btn:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

/* Tags Row */
.modal-tag-row {
  padding: 0.75rem 1.5rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.research-tag {
  font-size: 0.75rem;
  background: var(--primary-bg);
  color: var(--primary-dark);
  padding: 0.3rem 0.75rem;
  border-radius: 99px;
  font-weight: 500;
  border: 1px solid #c7d2fe;
}

.attachment-tag {
  font-size: 0.75rem;
  background: var(--success-bg);
  color: #065f46;
  padding: 0.3rem 0.75rem;
  border-radius: 99px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid #a7f3d0;
}

/* Modal Body */
.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.mail-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 0.4rem;
}

.mail-subject-input {
  width: 100%;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0.65rem 0.875rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-800);
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: white;
}

.mail-subject-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.mail-subject-input:read-only {
  background: var(--gray-50);
  color: var(--gray-700);
  cursor: default;
}

.mail-divider {
  height: 1px;
  background: var(--gray-100);
}

.mail-body-textarea {
  width: 100%;
  min-height: 260px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0.875rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--gray-700);
  font-family: var(--font);
  outline: none;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: white;
}

.mail-body-textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.mail-body-textarea[readonly] {
  background: var(--gray-50);
  cursor: default;
  color: var(--gray-600);
}

/* Modal Footer */
.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-shrink: 0;
  background: var(--gray-50);
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Sent state overlay on modal send button */
.btn-success.sent-state {
  background: linear-gradient(135deg, #059669, var(--success));
  opacity: 0.7;
  cursor: not-allowed;
}

/* Confirm icon */
.confirm-icon {
  display: flex;
  justify-content: center;
  padding: 0.5rem 0;
}

/* ═══════════════════════════════════ PROGRESS BAR ══════════════════════════════ */
.progress-bar-track {
  width: 100%;
  height: 8px;
  background: var(--gray-100);
  border-radius: 99px;
  overflow: hidden;
  margin-top: 1rem;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--success) 100%);
  border-radius: 99px;
  transition: width 0.5s ease;
}

/* ═══════════════════════════════════ TOAST ══════════════════════════════════════ */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 2000;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.1rem;
  border-radius: var(--radius);
  background: white;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
  font-size: 0.85rem;
  font-weight: 500;
  min-width: 280px;
  max-width: 360px;
  transform: translateX(120%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  opacity: 0;
  border-left: 4px solid transparent;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.hide {
  transform: translateX(120%);
  opacity: 0;
}

.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--danger); }
.toast.info    { border-left-color: var(--primary); }
.toast.warning { border-left-color: var(--warning); }

.toast-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toast.success .toast-icon { background: var(--success-bg); color: var(--success); }
.toast.error   .toast-icon { background: var(--danger-bg);  color: var(--danger); }
.toast.info    .toast-icon { background: var(--primary-bg); color: var(--primary); }
.toast.warning .toast-icon { background: var(--warning-bg); color: var(--warning); }

.toast-msg { flex: 1; color: var(--gray-700); line-height: 1.4; }

/* ═══════════════════════════════════ RESPONSIVE ════════════════════════════════ */
@media (max-width: 640px) {
  .main-content { padding: 1.5rem 1rem 3rem; }
  .header-inner { padding: 0 1rem; }
  .contacts-toolbar { flex-direction: column; align-items: flex-start; }
  .toolbar-right { width: 100%; justify-content: flex-end; }
  .contacts-grid { grid-template-columns: 1fr; }
  .modal { border-radius: var(--radius-lg) var(--radius-lg) 0 0; max-height: 95vh; }
  .modal-overlay { align-items: flex-end; }
  .modal-footer { flex-direction: column; }
  .footer-right { width: 100%; justify-content: stretch; }
  .footer-right button { flex: 1; justify-content: center; }
}