/* APP SHELL */
#app { display: flex; flex-direction: column; min-height: 100vh; }

.app-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-height); background: var(--bg-header);
  display: flex; align-items: center; padding: 0 1rem;
  box-shadow: var(--shadow-md);
}

.header-brand {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--text-on-dark); font-weight: 700; font-size: 1.05rem;
  text-decoration: none; flex-shrink: 0;
}
.header-brand img { width: 32px; height: 32px; }
.header-spacer { flex: 1; }
.header-actions { display: flex; align-items: center; gap: 0.5rem; }
.header-user { color: var(--text-on-dark-muted); font-size: 0.85rem; }

.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  color: #fff; font-size: 1.4rem; padding: 0.25rem; margin-right: 0.5rem;
}

.app-sidebar {
  position: fixed; left: 0; top: var(--header-height); bottom: 0;
  width: var(--sidebar-width); background: var(--bg-sidebar);
  overflow-y: auto; z-index: 90; padding-top: 0.5rem;
  transition: transform var(--transition);
}

.sidebar-section { padding: 0.5rem 0; }
.sidebar-label {
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.07em;
  color: var(--text-on-dark-muted); padding: 0.4rem 1rem 0.2rem;
  text-transform: uppercase;
}
.sidebar-link {
  display: flex; align-items: center; gap: 0.65rem;
  padding: 0.6rem 1rem; color: var(--text-on-dark-muted);
  font-size: 0.9rem; text-decoration: none; border-radius: 0;
  transition: all var(--transition); cursor: pointer;
}
.sidebar-link:hover { background: rgba(255,255,255,0.1); color: #fff; text-decoration: none; }
.sidebar-link.active { background: rgba(255,255,255,0.15); color: #fff; border-left: 3px solid var(--color-accent); }
.sidebar-link .icon { width: 18px; text-align: center; font-size: 1rem; flex-shrink: 0; }

.view-container {
  margin-top: var(--header-height);
  margin-left: var(--sidebar-width);
  padding: 1.5rem;
  min-height: calc(100vh - var(--header-height));
  flex: 1;
}

.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.5rem; flex-wrap: wrap; gap: 0.75rem;
}
.page-title { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.page-subtitle { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.15rem; }
.page-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }

.stat-card {
  background: var(--bg-primary); border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color); padding: 1.1rem 1.25rem;
  display: flex; align-items: center; gap: 1rem;
}
.stat-icon { font-size: 1.8rem; }
.stat-label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; }
.stat-value { font-size: 1.6rem; font-weight: 700; color: var(--text-primary); line-height: 1.1; }

/* TOAST */
.toast-container {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 999;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.toast {
  padding: 0.75rem 1.1rem; border-radius: var(--border-radius-sm);
  color: #fff; font-size: 0.88rem; font-weight: 500;
  box-shadow: var(--shadow-lg); animation: slideUp 0.2s ease;
  max-width: 320px;
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-info { background: var(--color-info); }
.toast-warning { background: var(--color-warning); }

/* MODAL */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  z-index: 200; display: flex; align-items: center; justify-content: center; padding: 1rem;
}
.modal-box {
  background: var(--bg-primary); border-radius: var(--border-radius-lg);
  padding: 1.5rem; max-width: 500px; width: 100%;
  box-shadow: var(--shadow-lg); animation: fadeIn 0.2s ease;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.modal-title { font-size: 1.1rem; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 1.3rem; cursor: pointer; color: var(--text-muted); }
.modal-footer { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 1.25rem; }

/* TABS */
.tabs { display: flex; border-bottom: 2px solid var(--border-color); margin-bottom: 1.25rem; }
.tab { padding: 0.5rem 1rem; font-size: 0.9rem; font-weight: 500; color: var(--text-muted); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.tab:hover { color: var(--text-primary); }

/* TIMELINE */
.timeline { position: relative; padding-left: 1.5rem; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 0; bottom: 0; width: 2px; background: var(--border-color); }
.timeline-item { position: relative; margin-bottom: 1.25rem; }
.timeline-dot { position: absolute; left: -1.5rem; top: 4px; width: 14px; height: 14px; border-radius: 50%; background: var(--color-primary); border: 2px solid #fff; box-shadow: 0 0 0 2px var(--color-primary); }
.timeline-date { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.15rem; }
.timeline-content { background: var(--bg-secondary); border-radius: var(--border-radius-sm); padding: 0.6rem 0.8rem; font-size: 0.88rem; }