/* ==========================================================================
   HYPERSTUDIO DESIGN SYSTEM — SS PROTOCOL
   Aesthetic: Blueprint scratched into obsidian.
   Restrained, precise, architectural. Weight 400 typography, hairline 1px rules.
   ========================================================================== */

:root {
  /* COLORS */
  --obsidian: #101010;
  --carbon: #080808;
  --chalk: #f3f3f3;
  --smoke: #9c9c9c;
  --ash: #c1c1c1;
  --graphite: #212121;
  --iron: #474747;
  --signal-white: #ffffff;
  --compass-gold: #6f6759;
  --card-slate: #3b3d45;
  --pulse-green: #98ff38;
  --danger: #ef4444;

  /* TYPOGRAPHY */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', Space Mono, monospace;

  /* SPACING & DIMENSIONS */
  --max-width: 1200px;
  --radius-tag: 4px;
  --radius-card: 8px;
  --radius-pill: 9999px;
}

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

html, body {
  background-color: var(--obsidian);
  color: var(--chalk);
  font-family: var(--font-main);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.25;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* TYPOGRAPHY SCALE (Weight 400 is signature) */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-main);
  font-weight: 400;
  color: var(--chalk);
}

.display-title {
  font-size: 63px;
  line-height: 1.05;
  letter-spacing: -0.69px;
  color: var(--chalk);
}

.heading-lg {
  font-size: 44px;
  line-height: 1.07;
  letter-spacing: -0.31px;
  color: var(--chalk);
}

.heading-md {
  font-size: 34px;
  line-height: 1.03;
  color: var(--chalk);
}

.subheading {
  font-size: 21px;
  line-height: 0.95;
  color: var(--smoke);
}

.heading-xs {
  font-size: 18px;
  line-height: 1.31;
  color: var(--chalk);
}

.body-text {
  font-size: 16px;
  line-height: 1.25;
  color: var(--smoke);
}

.caption {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--smoke);
  letter-spacing: -0.022em;
}

/* SECTION DIVIDER (Hairline rule that IS the structure) */
.divider {
  width: 100%;
  height: 1px;
  background-color: var(--graphite);
  border: none;
  margin: 40px 0;
}

/* TOAST NOTIFICATIONS (Minimal, flat) */
#toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-card);
  padding: 12px 20px;
  color: var(--chalk);
  font-size: 14px;
  font-family: var(--font-mono);
  letter-spacing: -0.022em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.toast.success { border-color: var(--iron); }
.toast.error { border-color: var(--danger); color: #fca5a5; }
.toast.info { border-color: var(--graphite); }

/* STATUS BADGE */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #1a1a1a;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--smoke);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--smoke);
}

.status-dot.active {
  background: var(--pulse-green);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-main);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

/* White Pill Button (Primary) */
.btn-primary {
  background: var(--signal-white);
  color: var(--obsidian);
  border: none;
  border-radius: var(--radius-pill);
  padding: 12px 24px;
  font-size: 14px;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Ghost Outline Button (Secondary) */
.btn-secondary {
  background: transparent;
  color: var(--chalk);
  border: 1px solid var(--iron);
  border-radius: var(--radius-card);
  padding: 10px 20px;
  font-size: 14px;
}

.btn-secondary:hover {
  border-color: var(--signal-white);
  color: var(--signal-white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}

.btn-xs {
  padding: 4px 10px;
  font-size: 11px;
  font-family: var(--font-mono);
  border-radius: var(--radius-tag);
  background: transparent;
  color: var(--smoke);
  border: 1px solid var(--graphite);
}

.btn-xs:hover {
  border-color: var(--iron);
  color: var(--chalk);
}

.btn-danger {
  background: transparent;
  color: #f87171;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-card);
  padding: 8px 16px;
  font-size: 13px;
}

.btn-danger:hover {
  border-color: var(--danger);
  background: rgba(239, 68, 68, 0.08);
}

.btn-link {
  background: none;
  border: none;
  color: var(--smoke);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 0;
  transition: color 0.2s;
}

.btn-link:hover {
  color: var(--chalk);
}

/* FORM CONTROLS */
.form-group, .input-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--smoke);
  margin-bottom: 8px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
  width: 100%;
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 12px 16px;
  color: var(--chalk);
  font-family: var(--font-main);
  font-weight: 400;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease;
}

input:focus {
  border-color: var(--iron);
}

input::placeholder {
  color: #555555;
}

.single-code-input {
  font-family: var(--font-mono) !important;
  font-size: 28px !important;
  letter-spacing: 12px !important;
  text-align: center;
  padding: 16px !important;
  color: var(--chalk) !important;
  background: var(--carbon) !important;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .form-row-2 {
    grid-template-columns: 1fr;
  }
}

/* CARDS & CONTAINERS */
.card {
  background: transparent;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-card);
  padding: 32px 40px;
  position: relative;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  gap: 16px;
}

.card-title {
  font-size: 18px;
  line-height: 1.31;
  color: var(--chalk);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}

.card-subtitle {
  font-size: 14px;
  color: var(--smoke);
  line-height: 1.4;
}

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* AUTH WRAPPER (Unauthenticated view) */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.auth-box {
  width: 100%;
  max-width: 460px;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-card);
  padding: 48px;
  background: var(--obsidian);
}

.brand-header {
  margin-bottom: 36px;
  text-align: left;
}

.brand-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--smoke);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.brand-title {
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: -0.31px;
  color: var(--chalk);
  margin-bottom: 8px;
}

.brand-subtitle {
  font-size: 14px;
  color: var(--smoke);
  line-height: 1.4;
}

.auth-view {
  display: none;
}

.auth-view.active {
  display: block;
}

.view-title {
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--chalk);
  margin-bottom: 24px;
}

.auth-footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--graphite);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--smoke);
}

/* APP WRAPPER (Authenticated view) */
.app-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px 24px;
}

/* TOP NAVIGATION BAR */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--graphite);
  margin-bottom: 40px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.wordmark {
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--chalk);
  text-transform: uppercase;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--chalk);
}

/* METRICS OVERVIEW (Hero band) */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

@media (max-width: 900px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}

.metric-card {
  border: 1px solid var(--graphite);
  border-radius: var(--radius-card);
  padding: 24px;
  background: var(--carbon);
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--smoke);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.metric-num {
  font-size: 34px;
  line-height: 1.03;
  color: var(--chalk);
}

.metric-sub {
  font-size: 13px;
  color: var(--smoke);
  margin-top: 8px;
}

/* TABS NAVIGATION */
.tabs-nav {
  display: flex;
  gap: 24px;
  border-bottom: 1px solid var(--graphite);
  margin-bottom: 40px;
  overflow-x: auto;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 12px 4px 16px 4px;
  color: var(--smoke);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.tab-btn:hover {
  color: var(--chalk);
}

.tab-btn.active {
  color: var(--chalk);
  border-bottom-color: var(--signal-white);
}

.tab-content {
  display: none;
}

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

/* SESSIONS & AUDIT TABLES */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-card);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: left;
}

th {
  background: var(--carbon);
  padding: 14px 16px;
  color: var(--smoke);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--graphite);
}

td {
  padding: 14px 16px;
  color: var(--chalk);
  border-bottom: 1px solid var(--graphite);
}

tr:last-child td {
  border-bottom: none;
}

/* SESSIONS LIST */
.sessions-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.session-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
}

.session-ip {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--chalk);
  margin-bottom: 4px;
}

.session-ua {
  font-size: 13px;
  color: var(--smoke);
}

/* TOTP SETUP SPECIFICS */
.qr-wrapper {
  background: #ffffff;
  padding: 16px;
  border-radius: var(--radius-tag);
  display: inline-block;
  margin: 16px 0;
}

.secret-box {
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 16px;
  margin: 16px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.secret-code {
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 2px;
  color: var(--chalk);
}

.backup-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 16px 0;
}

@media (max-width: 600px) {
  .backup-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.backup-pill {
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 8px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--smoke);
}

.spool-container {
  background: var(--carbon);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--smoke);
}

.badge-active {
  background: #1a1a1a;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--chalk);
  text-transform: uppercase;
}

.badge-inactive {
  background: #1a1a1a;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-tag);
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--smoke);
  text-transform: uppercase;
}