:root,
[data-bs-theme="light"] {
  --sm-ink: #112132;
  --sm-ink-soft: #49627a;
  --sm-canvas: #f4f7fb;
  --sm-card: rgba(255, 255, 255, 0.88);
  --sm-line: rgba(17, 33, 50, 0.1);
  --sm-accent: #0c6d62;
  --sm-accent-dark: #084f48;
  --sm-glow: rgba(12, 109, 98, 0.16);
  --sm-header-surface: #233242;
  --sm-header-bg: rgba(17, 33, 50, 0.92);
  --sm-header-border: rgba(255, 255, 255, 0.08);
  --sm-header-text: rgba(255, 255, 255, 0.92);
  --sm-header-text-soft: rgba(255, 255, 255, 0.85);
  --sm-focus-ring: rgba(12, 109, 98, 0.18);
  --sm-body-bg: linear-gradient(180deg, #f8fbff, #eef3f8 55%, #f6f8fb);
  --sm-body-overlay1: rgba(12, 109, 98, 0.12);
  --sm-body-overlay2: rgba(17, 33, 50, 0.08);
  --sm-msg-body-bg: #fbfdff;
  --sm-attach-panel-bg: rgba(251, 253, 255, 0.95);
  --sm-attach-panel-hover: rgba(255, 255, 255, 0.98);
  --sm-attach-panel-border: rgba(17, 33, 50, 0.18);
  --sm-attach-item-bg: #fff;
  --sm-attach-active-bg: rgba(12, 109, 98, 0.08);
  --sm-attach-active-border: rgba(12, 109, 98, 0.65);
  --sm-item-bg: rgba(255, 255, 255, 0.9);
  --sm-btn-primary-hover-from: #0f7d70;
  --sm-btn-primary-hover-to: #0a5f56;
  --sm-link: #0077cc;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-bs-theme="light"]) {
    --sm-ink: #e2e8f0;
    --sm-ink-soft: #94a3b8;
    --sm-canvas: #0f172a;
    --sm-card: rgba(30, 41, 59, 0.88);
    --sm-line: rgba(148, 163, 184, 0.15);
    --sm-accent: #2dd4bf;
    --sm-accent-dark: #14b8a6;
    --sm-glow: rgba(45, 212, 191, 0.16);
    --sm-header-surface: #0f172a;
    --sm-header-bg: rgba(15, 23, 42, 0.95);
    --sm-header-border: rgba(148, 163, 184, 0.1);
    --sm-header-text: rgba(226, 232, 240, 0.95);
    --sm-header-text-soft: rgba(226, 232, 240, 0.8);
    --sm-focus-ring: rgba(45, 212, 191, 0.25);
    --sm-body-bg: linear-gradient(180deg, #0f172a, #1e293b 55%, #0f172a);
    --sm-body-overlay1: rgba(45, 212, 191, 0.06);
    --sm-body-overlay2: rgba(15, 23, 42, 0.08);
    --sm-msg-body-bg: rgba(15, 23, 42, 0.6);
    --sm-attach-panel-bg: rgba(30, 41, 59, 0.8);
    --sm-attach-panel-hover: rgba(30, 41, 59, 0.95);
    --sm-attach-panel-border: rgba(148, 163, 184, 0.2);
    --sm-attach-item-bg: rgba(30, 41, 59, 0.9);
    --sm-attach-active-bg: rgba(45, 212, 191, 0.08);
    --sm-attach-active-border: rgba(45, 212, 191, 0.5);
    --sm-item-bg: rgba(30, 41, 59, 0.8);
    --sm-btn-primary-hover-from: #14b8a6;
    --sm-btn-primary-hover-to: #0d9488;
    --sm-link: #38bdf8;
  }
}

[data-bs-theme="dark"] {
  --sm-ink: #e2e8f0;
  --sm-ink-soft: #94a3b8;
  --sm-canvas: #0f172a;
  --sm-card: rgba(30, 41, 59, 0.88);
  --sm-line: rgba(148, 163, 184, 0.15);
  --sm-accent: #2dd4bf;
  --sm-accent-dark: #14b8a6;
  --sm-glow: rgba(45, 212, 191, 0.16);
  --sm-header-surface: #0f172a;
  --sm-header-bg: rgba(15, 23, 42, 0.95);
  --sm-header-border: rgba(148, 163, 184, 0.1);
  --sm-header-text: rgba(226, 232, 240, 0.95);
  --sm-header-text-soft: rgba(226, 232, 240, 0.8);
  --sm-focus-ring: rgba(45, 212, 191, 0.25);
  --sm-body-bg: linear-gradient(180deg, #0f172a, #1e293b 55%, #0f172a);
  --sm-body-overlay1: rgba(45, 212, 191, 0.06);
  --sm-body-overlay2: rgba(15, 23, 42, 0.08);
  --sm-msg-body-bg: rgba(15, 23, 42, 0.6);
  --sm-attach-panel-bg: rgba(30, 41, 59, 0.8);
  --sm-attach-panel-hover: rgba(30, 41, 59, 0.95);
  --sm-attach-panel-border: rgba(148, 163, 184, 0.2);
  --sm-attach-item-bg: rgba(30, 41, 59, 0.9);
  --sm-attach-active-bg: rgba(45, 212, 191, 0.08);
  --sm-attach-active-border: rgba(45, 212, 191, 0.5);
  --sm-item-bg: rgba(30, 41, 59, 0.8);
  --sm-btn-primary-hover-from: #14b8a6;
  --sm-btn-primary-hover-to: #0d9488;
  --sm-link: #38bdf8;
}

html {
  font-size: 15px;
  min-height: 100%;
  background-color: var(--sm-header-surface);
}

@media (min-width: 992px) {
  html {
    font-size: 16px;
  }
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--sm-ink);
  background-color: var(--sm-canvas);
  background:
    radial-gradient(circle at top left, var(--sm-body-overlay1), transparent 30%),
    radial-gradient(circle at top right, var(--sm-body-overlay2), transparent 26%),
    var(--sm-body-bg);
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem var(--sm-focus-ring);
}

.shell-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--sm-header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--sm-header-border);
}

.shell-header .container {
  max-width: 960px;
}

.shell-header .nav-link,
.shell-header .navbar-brand {
  color: var(--sm-header-text) !important;
}

.shell-header .nav-link {
  font-size: 1rem;
  font-weight: 500;
}

.shell-header .navbar-brand {
  padding: 0.2rem 0;
}

.navbar-logo {
  display: block;
  padding: 0.18rem;
  border-radius: 0.6rem;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
}

[data-bs-theme="dark"] .navbar-logo {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28);
}

.shell-body {
  padding-top: 1.5rem;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.footer {
  padding: 0rem 0 2rem;
}

.nav-user {
  color: var(--sm-header-text-soft);
  font-size: 0.95rem;
}

.shell-nav-collapse {
  gap: 1rem;
}

.shell-nav-actions {
  flex-wrap: wrap;
}

.shell-language-switcher .btn {
  min-width: 3rem;
}

.shell-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
}

.shell-header .btn,
.shell-header .shell-action-btn,
.shell-language-switcher .btn {
  min-height: 2.5rem;
  padding: 0.5rem 0.85rem;
  font-size: 0.95rem;
  border-radius: 12px;
}

.shell-mobile-label {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
}

@media (max-width: 991.98px) {
  .shell-header .navbar {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .shell-nav-collapse {
    margin-top: 0.9rem;
    padding: 1rem;
    border: 1px solid var(--sm-header-border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.06);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  }

  [data-bs-theme="dark"] .shell-nav-collapse {
    background: rgba(148, 163, 184, 0.08);
  }

  .shell-header .navbar-nav {
    gap: 0.35rem;
  }

  .shell-header .navbar-nav .nav-link {
    display: block;
    padding: 0.7rem 0.9rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
  }

  .shell-header .navbar-nav .nav-link:hover,
  .shell-header .navbar-nav .nav-link:focus {
    background: rgba(255, 255, 255, 0.1);
  }

  .shell-nav-actions {
    align-items: stretch !important;
    justify-content: stretch;
    gap: 0.6rem !important;
    padding-top: 0.35rem;
    border-top: 1px solid var(--sm-header-border);
  }

  .shell-language-switcher {
    width: 100%;
  }

  .shell-language-switcher .btn {
    flex: 1 1 0;
    padding-top: 0.55rem;
    padding-bottom: 0.55rem;
  }

  .nav-user {
    width: 100%;
    padding: 0.15rem 0.1rem 0;
  }

  .shell-nav-actions > .btn,
  .shell-nav-actions > a.btn {
    min-height: 2.5rem;
    min-width: 2.5rem;
    justify-content: flex-start;
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  .shell-nav-actions > .shell-action-btn {
    flex: 1 1 calc(50% - 0.3rem);
  }
}

.hero-panel,
.content-card,
.message-shell,
.stat-card {
  background: var(--sm-card);
  border: 1px solid var(--sm-line);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
}

.hero-panel {
  display: grid;
  gap: 2rem;
  padding: 2rem;
}

@media (min-width: 992px) {
  .hero-panel {
    grid-template-columns: 1.5fr 1fr;
    padding: 3rem;
  }
}

.hero-card,
.content-card {
  padding: 1.5rem;
}

.hero-copy,
.text-muted-strong {
  color: var(--sm-ink-soft);
}

.text-muted-strong {
  font-size: 1.05rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--sm-accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.btn-primary {
  background: linear-gradient(135deg, var(--sm-accent), var(--sm-accent-dark));
  border-color: transparent;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--sm-btn-primary-hover-from), var(--sm-btn-primary-hover-to));
}

.section-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 992px) {
  .section-grid.two-up {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.form-panel {
  padding: 1.5rem;
}

h1 {
  font-size: clamp(2rem, 3.1vw, 2rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.form-panel h1 {
  margin-bottom: 0.65rem;
}

.form-label {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.public-access-actions {
  display: grid;
  gap: 1rem;
  align-items: start;
}

.public-access-inline-form {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.public-access-otp-form {
  display: flex;
  width: 100%;
  max-width: none;
}

.public-access-otp-form .mb-3 {
  width: 100%;
  margin-bottom: 0 !important;
}

.public-access-otp-form .form-control {
  width: 100%;
}

.public-access-close-row {
  display: flex;
  justify-content: flex-end;
}

.public-access-close-form {
  margin-top: 0;
}

.hint-text {
  color: var(--sm-ink-soft);
  font-size: 1rem;
  line-height: 1.6;
}

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

.attachment-picker-panel {
  border: 1px dashed var(--sm-attach-panel-border);
  border-radius: 18px;
  padding: 1rem;
  background: var(--sm-attach-panel-bg);
  cursor: pointer;
}

.attachment-picker-panel:hover {
  border-color: rgba(12, 109, 98, 0.35);
  background: var(--sm-attach-panel-hover);
}

.attachment-picker-panel.is-dragover {
  border-color: var(--sm-attach-active-border);
  background: var(--sm-attach-active-bg);
  box-shadow: 0 0 0 0.2rem var(--sm-focus-ring);
}

.attachment-picker-panel:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 0.2rem var(--sm-focus-ring);
}

.attachment-picker-copy {
  display: grid;
  gap: 0.2rem;
}

.attachment-picker-list {
  display: grid;
  gap: 0.75rem;
}

.attachment-picker-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--sm-line);
  border-radius: 14px;
  background: var(--sm-attach-item-bg);
  cursor: default;
}

.attachment-picker-meta {
  min-width: 0;
}

.attachment-picker-meta strong {
  display: block;
  overflow-wrap: anywhere;
}

.message-shell {
  padding: 1.5rem;
}

.message-meta {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .message-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.message-body {
  white-space: pre-wrap;
  background: var(--sm-msg-body-bg);
  border: 1px solid var(--sm-line);
  border-radius: 18px;
  padding: 1rem;
}

.attachment-list,
.timeline-list {
  display: grid;
  gap: 0.75rem;
}

.timeline-list {
  gap: 0;
}

.attachment-item,
.timeline-item {
  border: 1px solid var(--sm-line);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  background: var(--sm-item-bg);
}

.timeline-item {
  border: none;
  border-radius: 0;
  border-left: 2px solid var(--sm-line);
  background: none;
  padding: 0.4rem 0 0.4rem 1rem;
  font-size: 0.9rem;
  color: var(--sm-ink-soft);
}

.metric-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.stat-card {
  padding: 1rem 1.2rem;
}

.table-card {
  padding: 0;
}

.card-header-row {
  padding: 1.5rem 1.5rem 1rem;
}

.card-header-row h1 {
  margin-bottom: 0;
}

.table-card-body {
  overflow-x: auto;
  padding: 0 1.5rem 1.5rem;
}

.messages-table {
  table-layout: fixed;
}

.messages-table th,
.messages-table td {
  vertical-align: middle;
}

.message-truncate-cell {
  min-width: 0;
}

.message-truncate-link,
.message-truncate-inline {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-created-cell,
.message-created-value {
  white-space: nowrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  background: var(--sm-glow);
  color: var(--sm-accent-dark);
  font-weight: 600;
  font-size: 0.88rem;
}

.settings-tabs {
  margin-top: 1.5rem;
  border-bottom: 1px solid var(--sm-line);
}

.settings-tabs .nav-link {
  color: var(--sm-ink-soft);
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding-left: 0;
  padding-right: 1.25rem;
  background: transparent;
}

.settings-tabs .nav-link:hover,
.settings-tabs .nav-link:focus {
  color: var(--sm-accent-dark);
  border-color: transparent;
}

.settings-tabs .nav-link.active {
  color: var(--sm-accent-dark);
  font-weight: 700;
  border-color: var(--sm-accent);
  background: transparent;
}

.settings-tab-content {
  padding-top: 1.5rem;
}

a {
  color: var(--sm-link);
}

.form-control,
.form-select {
  background-color: var(--sm-attach-item-bg);
  color: var(--sm-ink);
  border-color: var(--sm-line);
}

.form-control,
.form-select,
.btn {
  font-size: 1rem;
}

.form-control,
.form-select {
  min-height: 3.25rem;
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
}

textarea.form-control {
  min-height: 12rem;
  line-height: 1.65;
}

.btn {
  min-height: 3.25rem;
  padding: 0.8rem 1.2rem;
  font-weight: 600;
  border-radius: 14px;
}

.table {
  --bs-table-color: var(--sm-ink);
  --bs-table-bg: transparent;
  --bs-table-border-color: var(--sm-line);
  --bs-table-hover-bg: var(--sm-glow);
}

/* Confirmation/status page centering */
.status-page {
  max-width: 540px;
  margin: 2rem auto;
  text-align: center;
  padding: 2.5rem;
}

.status-page .status-icon {
  font-size: 2.5rem;
  color: var(--sm-accent);
  margin-bottom: 1rem;
}

/* Direction badge in message table */
.direction-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.direction-badge.inbound {
  color: var(--sm-accent-dark);
}

.direction-badge.outbound {
  color: var(--sm-ink-soft);
}

/* Message shell */
.message-shell {
  max-width: none;
}

/* Modal theming */
.modal-content {
  background-color: var(--sm-card);
  color: var(--sm-ink);
  border-color: var(--sm-line);
}

/* Outline buttons — dark theme visibility fix */
[data-bs-theme="dark"] .btn-outline-secondary {
  --bs-btn-color: var(--sm-ink);
  --bs-btn-border-color: var(--sm-line);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: rgba(148, 163, 184, 0.2);
  --bs-btn-hover-border-color: var(--sm-ink-soft);
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: rgba(148, 163, 184, 0.3);
  --bs-btn-active-border-color: var(--sm-ink-soft);
}

/* Button icon alignment */
.btn .bi {
  vertical-align: -0.125em;
}

/* Small form text */
.form-text {
  color: var(--sm-ink-soft);
  font-size: 0.98rem;
  line-height: 1.6;
}

.copy-input-group .btn {
  min-width: 2.75rem;
}

/* Mobile message card list */
.message-card-list {
  display: grid;
  gap: 0;
  padding: 0 1rem 1rem;
}

.message-card-item {
  display: block;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--sm-line);
  text-decoration: none;
  color: var(--sm-ink);
}

.message-card-item:last-child {
  border-bottom: 0;
}

.message-card-item:active {
  background: var(--sm-glow);
}

.message-card-subject {
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.message-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--sm-ink-soft);
}

.message-card-date {
  font-size: 0.8rem;
  margin-top: 0.15rem;
}