/* Bulk Mailer UI - responsive rewrite */

:root,
[data-theme="light"] {
  --color-bg: #f6f4ee;
  --color-surface: #f0ede6;
  --color-surface-2: #ffffff;
  --color-surface-3: #f7f5f0;
  --color-border: #d7d2c7;
  --color-divider: #dfd9cf;
  --color-text: #231f1a;
  --color-text-muted: #6d675f;
  --color-text-faint: #9a938a;
  --color-primary: #2e7f88;
  --color-primary-hover: #276d75;
  --color-primary-active: #1f5860;
  --color-primary-highlight: #d8edf0;
  --color-danger: #a24a78;
  --color-danger-hover: #8a3d66;
  --color-success: #457437;
  --color-success-bg: #dce9d8;
  --color-warning: #9d5926;
  --color-warning-bg: #ead9ca;
  --color-error-bg: #edd8de;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.9rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.85rem);
  --text-sm: clamp(0.9rem, 0.86rem + 0.2vw, 1rem);
  --text-base: clamp(1rem, 0.96rem + 0.3vw, 1.125rem);
  --text-lg: clamp(1.2rem, 1.08rem + 0.75vw, 1.6rem);
  --text-xl: clamp(1.6rem, 1.35rem + 1.4vw, 2.5rem);

  --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.12);
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --sidebar-w: 250px;
  --content-max: 1120px;
}

[data-theme="dark"] {
  --color-bg: #171513;
  --color-surface: #1d1a17;
  --color-surface-2: #21201d;
  --color-surface-3: #282521;
  --color-border: #393531;
  --color-divider: #2e2b27;
  --color-text: #e5dfd6;
  --color-text-muted: #a19a90;
  --color-text-faint: #6f6860;
  --color-primary: #68b3bd;
  --color-primary-hover: #4da4af;
  --color-primary-active: #37868f;
  --color-primary-highlight: #203236;
  --color-danger: #da74ad;
  --color-danger-hover: #c15d95;
  --color-success: #7fb05f;
  --color-success-bg: #28362a;
  --color-warning: #d28c59;
  --color-warning-bg: #403328;
  --color-error-bg: #4a3841;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.35);
}

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

html {
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--color-primary) 16%, transparent), transparent 34%),
    radial-gradient(circle at bottom right, color-mix(in srgb, var(--color-success) 12%, transparent), transparent 28%),
    var(--color-bg);
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

input,
textarea,
select {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.7rem 0.85rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 18%, transparent);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-faint);
}

a,
button,
input,
textarea,
select {
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

[hidden],
#appShell[hidden],
#authShell[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

code {
  background: color-mix(in srgb, var(--color-primary-highlight) 54%, transparent);
  border-radius: var(--radius-sm);
  padding: 0.05rem 0.35rem;
  font-size: 0.9em;
}

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

.hidden {
  display: none !important;
}

#appShell {
  display: flex;
  width: 100%;
  min-height: 100dvh;
}

/* Auth */
.auth-shell {
  min-height: 100dvh;
  padding: clamp(1rem, 3vw, 2.5rem);
  display: grid;
  gap: 1.25rem;
  place-items: center;
}

.auth-card {
  width: 100%;
  background: color-mix(in srgb, var(--color-surface-2) 96%, transparent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: clamp(1rem, 2vw, 1.5rem);
}

.auth-card--hero {
  max-width: 56rem;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.auth-brand h1 {
  margin: 0;
  font-size: var(--text-xl);
  line-height: 1.05;
}

.auth-brand p,
.auth-copy {
  margin: 0.15rem 0 0;
  color: var(--color-text-muted);
}

.auth-copy {
  max-width: 70ch;
}

.auth-grid {
  width: min(56rem, 100%);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.auth-card h2 {
  margin: 0 0 1rem;
  font-size: var(--text-base);
}

.auth-card label {
  display: block;
  margin: 0 0 0.4rem;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--color-text-muted);
}

.auth-card input {
  margin-bottom: 0.9rem;
}

/* App layout */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100dvh;
  position: sticky;
  top: 0;
  align-self: flex-start;
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1rem 1rem 1.1rem;
  border-bottom: 1px solid var(--color-divider);
}

.sidebar-brand {
  font-weight: 700;
  font-size: var(--text-sm);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0.75rem;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  text-align: left;
  padding: 0.8rem 0.9rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-weight: 600;
}

.nav-item:hover {
  background: var(--color-surface-3);
  color: var(--color-text);
}

.nav-item.active {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

.nav-item svg {
  flex-shrink: 0;
}

.sidebar-footer {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  border-top: 1px solid var(--color-divider);
}

.theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface-2);
}

.theme-toggle:hover {
  background: var(--color-surface-3);
  color: var(--color-text);
}

.main {
  flex: 1;
  min-width: 0;
  padding: clamp(1rem, 2vw, 2rem);
}

.main > .tab-panel {
  max-width: var(--content-max);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.35rem;
}

.page-title {
  margin: 0;
  font-size: var(--text-xl);
  line-height: 1.1;
}

.page-subtitle {
  margin: 0.25rem 0 0;
  color: var(--color-text-muted);
}

.section-heading {
  margin: 0 0 1rem;
  font-size: var(--text-base);
}

/* Cards / forms */
.form-card,
.progress-panel,
.campaign-card,
.account-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.form-card,
.progress-panel {
  padding: clamp(1rem, 1.5vw, 1.5rem);
  margin-bottom: 1rem;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 1rem;
  font-size: var(--text-base);
}

.step-badge {
  width: 1.4rem;
  height: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--color-primary);
  color: white;
  font-size: 0.78rem;
  font-weight: 800;
  flex-shrink: 0;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.95rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group--narrow {
  flex: 0 1 290px;
}

.form-group--inline {
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.form-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.form-row .form-group {
  flex: 1 1 220px;
}

label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.label-hint {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  text-transform: none;
  letter-spacing: 0;
  margin-left: 0.35rem;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  padding-right: 2.2rem;
}

textarea {
  resize: vertical;
  min-height: 10rem;
  line-height: 1.6;
  font-family: 'Cascadia Mono', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.92rem;
}

.input-row {
  display: flex;
  gap: 0.6rem;
}

.input-row input {
  flex: 1;
}

code {
  background: var(--color-surface-3);
  border-radius: var(--radius-sm);
  padding: 0.08rem 0.34rem;
  font-size: 0.85em;
}

.dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 2vw, 2rem);
  text-align: center;
  color: var(--color-text-muted);
  cursor: pointer;
  background: color-mix(in srgb, var(--color-surface-2) 70%, transparent);
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

.dropzone svg {
  margin: 0 auto 0.75rem;
}

.dropzone p {
  margin: 0 0 0.25rem;
}

.dropzone .hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.link-text {
  color: var(--color-primary);
  font-weight: 700;
}

.dropzone.has-file {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.3rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 700;
  white-space: nowrap;
}

.btn-lg {
  min-height: 2.75rem;
  padding: 0.75rem 1.25rem;
  font-size: var(--text-base);
}

.btn-sm {
  min-height: 2rem;
  padding: 0.35rem 0.7rem;
  font-size: var(--text-xs);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-primary:active {
  background: var(--color-primary-active);
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

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

.btn-ghost {
  background: var(--color-surface-2);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  background: var(--color-surface-3);
  color: var(--color-text);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
  align-items: center;
}

.field-msg {
  min-height: 1.2rem;
  margin-top: 0.65rem;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.field-msg--large {
  font-size: var(--text-sm);
}

.field-msg.success {
  color: var(--color-success);
}

.field-msg.error {
  color: var(--color-danger);
}

.field-msg.info {
  color: var(--color-primary);
}

.progress-panel {
  margin-top: 1rem;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.kpi-card {
  padding: 0.95rem 0.8rem;
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-3);
}

.kpi-value {
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.kpi-label {
  margin-top: 0.15rem;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.progress-bar-wrap {
  width: 100%;
  height: 0.55rem;
  background: var(--color-surface-3);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0.65rem;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 50%, var(--color-success)));
  border-radius: inherit;
}

.progress-status {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.campaigns-list,
.accounts-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.campaign-card {
  padding: 1rem 1rem 0.95rem;
}

.campaign-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.campaign-subject {
  font-size: var(--text-base);
  font-weight: 800;
}

.campaign-date {
  margin-top: 0.1rem;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.campaign-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.25rem;
}

.stat {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.stat strong {
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.campaign-failure-reason {
  margin-top: 0.8rem;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-3);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  line-height: 1.5;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border-radius: var(--radius-full);
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-sending { background: var(--color-primary-highlight); color: var(--color-primary); }
.badge-done { background: var(--color-success-bg); color: var(--color-success); }
.badge-stopped { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-draft { background: var(--color-surface-3); color: var(--color-text-muted); }
.badge-paused { background: var(--color-warning-bg); color: var(--color-warning); }

.account-card {
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.account-host {
  font-size: var(--text-sm);
  font-weight: 800;
}

.account-detail {
  margin-top: 0.1rem;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  word-break: break-word;
}

.account-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.empty-state {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 0.45rem;
  padding: 2rem 1rem;
  color: var(--color-text-muted);
}

.empty-state svg {
  color: var(--color-text-faint);
}

.empty-state h3 {
  margin: 0.2rem 0 0;
  font-size: var(--text-base);
  color: var(--color-text);
}

.empty-state p {
  max-width: 36ch;
  margin: 0;
}

/* Layout / utility wrappers used by JS or existing markup */
.main .send-form,
.main .page-header,
.main .progress-panel,
.main .campaigns-list,
.main .two-col {
  width: 100%;
}

/* Responsive */
@media (max-width: 1120px) {
  .kpi-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 900px) {
  #appShell {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-height: auto;
    position: sticky;
    top: 0;
    z-index: 20;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .sidebar-logo {
    padding-bottom: 0.85rem;
  }

  .sidebar-nav {
    flex-direction: row;
    flex-wrap: wrap;
    padding: 0.75rem;
  }

  .nav-item {
    flex: 1 1 180px;
    justify-content: flex-start;
  }

  .sidebar-footer {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .main {
    padding: 1rem;
  }

  .page-header {
    flex-direction: column;
    align-items: stretch;
  }

  .account-card,
  .campaign-card-header,
  .two-col {
    grid-template-columns: 1fr;
  }

  .account-card,
  .campaign-card-header,
  .account-card {
    align-items: stretch;
    flex-direction: column;
  }

  .form-group--inline,
  .input-row {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 640px) {
  .auth-shell {
    padding: 0.85rem;
  }

  .auth-brand {
    align-items: flex-start;
  }

  .page-title {
    font-size: var(--text-lg);
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .form-card,
  .progress-panel,
  .campaign-card,
  .account-card,
  .auth-card {
    border-radius: var(--radius-lg);
  }

  .dropzone {
    padding: 1rem;
  }

  .btn,
  .btn-lg {
    width: 100%;
  }

  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .campaign-stats {
    gap: 0.6rem 1rem;
  }
}