/* T1Mem Dashboard Layout v2.0 — Midnight Executive */

/* ===== App Shell ===== */
.t1-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--t1-bg);
}

.t1-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.t1-page {
  display: none;
  animation: t1-fade-in var(--t1-duration-normal) var(--t1-easing);
}

.t1-page.active { display: block; }

@keyframes t1-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== Topbar ===== */
.t1-topbar {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--t1-space-5);
  background: rgba(19, 18, 41, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--t1-border);
  flex-shrink: 0;
  z-index: 30;
}

.t1-brand {
  display: flex;
  align-items: center;
  gap: var(--t1-space-3);
}

.t1-brand__logo {
  width: 34px;
  height: 34px;
  border-radius: var(--t1-radius-md);
  background: linear-gradient(135deg, var(--t1-brand-500), var(--t1-brand-300));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--t1-weight-bold);
  font-size: 14px;
  color: var(--t1-bg);
  box-shadow: 0 0 16px rgba(201, 162, 39, 0.3);
}

.t1-brand__name {
  font-size: var(--t1-text-md);
  font-weight: var(--t1-weight-bold);
  color: var(--t1-text-1);
  letter-spacing: -0.01em;
}

.t1-brand__sub {
  font-size: var(--t1-text-xs);
  color: var(--t1-text-3);
  margin-left: var(--t1-space-2);
  font-family: var(--t1-font-mono);
}

.t1-topbar__right {
  display: flex;
  align-items: center;
  gap: var(--t1-space-3);
}

/* ===== Sidebar ===== */
.t1-sidebar {
  display: none;
  width: 220px;
  background: var(--t1-surface-1);
  border-right: 1px solid var(--t1-border);
  flex-direction: column;
  overflow-y: auto;
  padding: var(--t1-space-4) 0;
}

.t1-nav__section { padding: var(--t1-space-2) 0; }

.t1-nav__title {
  padding: var(--t1-space-2) var(--t1-space-5);
  font-size: var(--t1-text-xs);
  font-weight: var(--t1-weight-bold);
  color: var(--t1-text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.t1-nav__item {
  display: flex;
  align-items: center;
  gap: var(--t1-space-3);
  padding: 10px var(--t1-space-5);
  margin: 0 var(--t1-space-2);
  border-radius: var(--t1-radius-md);
  color: var(--t1-text-2);
  font-size: var(--t1-text-sm);
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all var(--t1-duration-fast) var(--t1-easing);
}

.t1-nav__item:hover {
  background: var(--t1-surface-2);
  color: var(--t1-text-1);
}

.t1-nav__item.active {
  background: var(--t1-surface-2);
  color: var(--t1-brand-500);
  border-left-color: var(--t1-brand-500);
  box-shadow: inset 4px 0 12px rgba(201, 162, 39, 0.08);
}

.t1-nav__icon {
  width: 20px;
  text-align: center;
  font-size: var(--t1-text-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.t1-sidebar__footer {
  margin-top: auto;
  padding: var(--t1-space-4) var(--t1-space-5);
  border-top: 1px solid var(--t1-border);
  font-size: var(--t1-text-xs);
  color: var(--t1-text-2);
  line-height: var(--t1-leading-relaxed);
}

/* ===== Main Content ===== */
.t1-main {
  flex: 1;
  overflow-y: auto;
  padding: var(--t1-space-6);
  background: var(--t1-bg);
}

/* ===== Right Panel ===== */
.t1-right {
  display: none;
  width: 320px;
  background: var(--t1-surface-1);
  border-left: 1px solid var(--t1-border);
  flex-direction: column;
  overflow: hidden;
}

.t1-right__header {
  padding: var(--t1-space-4) var(--t1-space-5);
  border-bottom: 1px solid var(--t1-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--t1-surface-2);
}

.t1-right__title {
  font-weight: var(--t1-weight-semibold);
  font-size: var(--t1-text-sm);
  display: flex;
  align-items: center;
  gap: var(--t1-space-2);
}

.t1-right__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--t1-space-4);
}

/* ===== Page Header ===== */
.t1-page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--t1-space-6);
  gap: var(--t1-space-4);
  flex-wrap: wrap;
}

.t1-page-title {
  font-size: var(--t1-text-xl);
  font-weight: var(--t1-weight-bold);
  color: var(--t1-text-1);
  letter-spacing: -0.02em;
}

.t1-page-subtitle {
  font-size: var(--t1-text-sm);
  color: var(--t1-text-2);
  margin-top: var(--t1-space-1);
}

.t1-page-actions { display: flex; gap: var(--t1-space-3); }

/* ===== Grid System ===== */
.t1-grid {
  display: grid;
  gap: var(--t1-space-4);
}

.t1-grid--1 { grid-template-columns: 1fr; }
.t1-grid--2 { grid-template-columns: repeat(2, 1fr); }
.t1-grid--3 { grid-template-columns: repeat(3, 1fr); }
.t1-grid--4 { grid-template-columns: repeat(4, 1fr); }
.t1-grid--auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* ===== Container (portal/marketing pages) ===== */
.t1-container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--t1-space-5);
  padding-right: var(--t1-space-5);
}

/* ===== Section spacing ===== */
.t1-section { padding: var(--t1-space-12) 0; }
.t1-section-title {
  font-size: var(--t1-text-xl);
  font-weight: var(--t1-weight-bold);
  color: var(--t1-text-1);
  margin-bottom: var(--t1-space-4);
  padding-bottom: var(--t1-space-2);
  border-bottom: 1px solid var(--t1-border);
  display: flex;
  align-items: center;
  gap: var(--t1-space-2);
}

.t1-section-title::before {
  content: "";
  display: block;
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: var(--t1-brand-500);
}

/* ===== Stream Items ===== */
.t1-stream-item {
  margin-bottom: var(--t1-space-3);
  padding: var(--t1-space-3);
  background: var(--t1-surface-2);
  border-radius: var(--t1-radius-md);
  border-left: 3px solid var(--t1-info);
  transition: transform var(--t1-duration-fast) var(--t1-easing);
}

.t1-stream-item:hover { transform: translateX(2px); }

.t1-stream-item--user      { border-left-color: var(--t1-info); }
.t1-stream-item--assistant { border-left-color: var(--t1-purple); }
.t1-stream-item--system    { border-left-color: var(--t1-cyan); }
.t1-stream-item--tool      { border-left-color: var(--t1-warning); }

.t1-stream-meta {
  font-size: var(--t1-text-xs);
  color: var(--t1-text-3);
  margin-bottom: var(--t1-space-1);
  display: flex;
  align-items: center;
  gap: var(--t1-space-2);
}

.t1-stream-content {
  font-size: var(--t1-text-sm);
  line-height: var(--t1-leading-relaxed);
  color: var(--t1-text-1);
}

/* ===== Mobile Drawer ===== */
.t1-drawer-toggle { display: none; }
.t1-drawer-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--t1-radius-md);
  cursor: pointer;
  color: var(--t1-text-2);
  background: var(--t1-surface-2);
  border: 1px solid var(--t1-border);
  transition: all var(--t1-duration-fast) var(--t1-easing);
}

.t1-drawer-label:hover {
  background: var(--t1-surface-3);
  color: var(--t1-text-1);
}

.t1-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: all var(--t1-duration-normal) var(--t1-easing);
  z-index: 40;
}

.t1-drawer-toggle:checked ~ .t1-drawer-overlay {
  opacity: 1;
  visibility: visible;
}

.t1-drawer-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--t1-surface-1);
  border-right: 1px solid var(--t1-border);
  transform: translateX(-100%);
  transition: transform var(--t1-duration-normal) var(--t1-easing);
  z-index: 50;
  overflow-y: auto;
  padding: var(--t1-space-4) 0;
}

.t1-drawer-toggle:checked ~ .t1-drawer-sidebar {
  transform: translateX(0);
}

.t1-drawer-close {
  position: absolute;
  top: var(--t1-space-4);
  right: var(--t1-space-4);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--t1-radius-md);
  cursor: pointer;
  color: var(--t1-text-2);
  background: var(--t1-surface-2);
  border: 1px solid var(--t1-border);
  z-index: 10;
}

/* ===== Responsive Breakpoints ===== */
@media (min-width: 768px) {
  .t1-sidebar { display: flex; }
  .t1-drawer-label { display: none; }
  .t1-md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .t1-md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .t1-md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .t1-main { padding: var(--t1-space-8); }
  .t1-lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .t1-lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1280px) {
  .t1-sidebar { width: 240px; }
  .t1-right { display: flex; }
  .t1-xl\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .t1-xl\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1536px) {
  .t1-main { padding: var(--t1-space-10); }
  .t1-container { max-width: 1440px; }
}

/* ===== Mobile adjustments ===== */
@media (max-width: 767px) {
  .t1-main { padding: var(--t1-space-4); }
  .t1-page-header { flex-direction: column; align-items: flex-start; }
  .t1-grid--2,
  .t1-grid--3,
  .t1-grid--4,
  .t1-md\:grid-cols-2,
  .t1-md\:grid-cols-3,
  .t1-lg\:grid-cols-3,
  .t1-lg\:grid-cols-4,
  .t1-xl\:grid-cols-4,
  .t1-xl\:grid-cols-3 { grid-template-columns: 1fr; }
}