/* ============================================================
   AFSPECWAR Training — Layout CSS
   Nav, page shell, responsive grid
   ============================================================ */

/* ── App shell ──────────────────────────────────────────── */
.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Top nav ────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--navy-mid);
  border-bottom: 1px solid var(--navy-border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  z-index: var(--z-nav);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.nav-inner {
  display: flex;
  align-items: center;
  width: 100%;
  gap: 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.nav-logo {
  height: 38px;
  width: auto;
}

.nav-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--white);
  white-space: nowrap;
  display: none;
}

@media (min-width: 640px) {
  .nav-title { display: block; }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  margin-left: auto;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0 0.875rem;
  height: var(--nav-height);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--t-fast), border-color var(--t-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--white);
  border-bottom-color: rgba(74,158,218,0.4);
}

.nav-link.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.nav-link.admin-link {
  color: var(--gold-dim);
}

.nav-link.admin-link.active,
.nav-link.admin-link:hover {
  color: var(--gold);
}

.nav-separator {
  width: 1px;
  height: 20px;
  background: var(--navy-border);
  margin: 0 0.25rem;
}

.nav-logout {
  padding: 0 0.875rem;
  height: var(--nav-height);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--silver);
  cursor: pointer;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.nav-logout:hover {
  color: var(--danger-light);
  border-bottom-color: var(--danger);
}

/* Hamburger (mobile) */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  background: none;
  border: none;
  margin-left: auto;
  padding: 6px;
  border-radius: var(--radius);
}

.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--silver-light);
  border-radius: 1px;
  transition: all var(--t-fast);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--navy-mid);
  border-bottom: 1px solid var(--navy-border);
  padding: 0.75rem 1rem;
  z-index: calc(var(--z-nav) - 1);
  flex-direction: column;
  gap: 0;
  box-shadow: var(--shadow-lg);
}

.nav-drawer.open { display: flex; }

.nav-drawer .nav-link {
  padding: 0.8rem 1rem;
  height: auto;
  border-bottom: none;
  border-left: 3px solid transparent;
  margin-bottom: 0;
  font-size: 0.875rem;
}

.nav-drawer .nav-link.active {
  border-left-color: var(--gold);
  border-bottom: none;
  background: rgba(74,158,218,0.05);
}

.nav-drawer .nav-logout {
  padding: 0.8rem 1rem;
  height: auto;
  border-bottom: none;
  border-left: 3px solid transparent;
  text-align: left;
  font-size: 0.875rem;
  border-top: 1px solid var(--navy-border);
  margin-top: 0.5rem;
  padding-top: 1rem;
  width: 100%;
}

/* Mobile breakpoints */
@media (max-width: 767px) {
  .nav-links    { display: none; }
  .nav-hamburger { display: flex; }
}

/* Mobile nav: show nav-links when .open is toggled by JS */
@media (max-width: 767px) {
  .nav-links.open {
    display: flex;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--navy-mid);
    border-bottom: 1px solid var(--navy-border);
    padding: 0.75rem 1rem;
    z-index: calc(var(--z-nav) - 1);
    gap: 0;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open .nav-link {
    padding: 0.8rem 1rem;
    height: auto;
    border-bottom: none;
    border-left: 3px solid transparent;
    margin-bottom: 0;
    font-size: 0.875rem;
  }
  .nav-links.open .nav-link.active {
    border-left-color: var(--gold);
    border-bottom: none;
    background: rgba(74,158,218,0.05);
  }
  .nav-links.open .nav-logout {
    padding: 0.8rem 1rem;
    height: auto;
    border-bottom: none;
    text-align: left;
    font-size: 0.875rem;
    border-top: 1px solid var(--navy-border);
    margin-top: 0.5rem;
    padding-top: 1rem;
    width: 100%;
  }
  .nav-inner {
    display: flex;
    align-items: center;
    width: 100%;
  }
}

/* ── Page wrapper ───────────────────────────────────────── */
.page {
  margin-top: var(--nav-height);
  padding: 1.75rem 1.25rem;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

@media (min-width: 768px) {
  .page {
    padding: 2rem 1.75rem;
  }
}

@media (min-width: 1200px) {
  .page {
    padding: 2.25rem 2rem;
  }
}

/* ── Page header ────────────────────────────────────────── */
.page-header {
  margin-bottom: 1.75rem;
}

.page-header h1, .page-header h2 {
  margin-bottom: 0.25rem;
}

.page-header p {
  color: var(--silver);
  margin: 0;
}

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

/* ── Grid layouts ───────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

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

@media (min-width: 900px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

/* Split layout (content + sidebar) */
.split-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .split-layout {
    grid-template-columns: 1fr 340px;
  }
}

@media (min-width: 1100px) {
  .split-layout {
    grid-template-columns: 1fr 380px;
  }
}

/* ── Auth layout (centered, no nav) ─────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background:
    linear-gradient(180deg, rgba(74,158,218,0.04) 0%, transparent 40%),
    var(--navy);
}

.auth-box {
  width: 100%;
  max-width: 440px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo img {
  height: 80px;
  margin: 0 auto 0.875rem;
}

.auth-logo h1 {
  font-size: 1.5rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--white);
}

.auth-logo p {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--silver);
  margin: 0;
}

/* ── Full-width auth layout for register (wider) ────────── */
.register-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background:
    linear-gradient(180deg, rgba(74,158,218,0.04) 0%, transparent 40%),
    var(--navy);
}

.register-box {
  width: 100%;
  max-width: 560px;
}

/* ── Dashboard hero strip ───────────────────────────────── */
.dashboard-hero {
  background: var(--navy-mid);
  border: 1px solid var(--navy-border);
  border-left: 4px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

/* ── Section title ──────────────────────────────────────── */
.section-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--silver);
  margin-bottom: 0.875rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--gold);
}

/* ── Completion screen ──────────────────────────────────── */
.completion-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  background: var(--navy);
}

.completion-box {
  max-width: 500px;
}

.completion-box h1 {
  font-size: 2.5rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

/* ── Aliases for page wrapper ───────────────────────────── */
.page-wrapper {
  margin-top: var(--nav-height);
  padding: 1.75rem 1.25rem;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

@media (min-width: 768px) {
  .page-wrapper { padding: 2rem 1.75rem; }
}

@media (min-width: 1200px) {
  .page-wrapper { padding: 2.25rem 2rem; }
}

/* Auth layout aliases */
.auth-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse 60% 50% at 50% 40%, rgba(74,158,218,0.06) 0%, transparent 70%),
    linear-gradient(180deg, rgba(74,158,218,0.04) 0%, transparent 40%),
    var(--navy);
}

.auth-container {
  width: 100%;
  max-width: 440px;
}

.register-container {
  width: 100%;
  max-width: 540px;
}

.split-left  { min-width: 0; }
.split-right { min-width: 0; }

@media (min-width: 900px) {
  .split-layout {
    grid-template-columns: 1fr 360px;
  }
}

/* ── Print styles ───────────────────────────────────────── */
@media print {
  .nav, .nav-drawer, #toast-container { display: none !important; }
  .page { margin-top: 0; padding: 0; max-width: 100%; }
  .card { border: 1px solid #ccc; box-shadow: none; background: white; color: black; }
  .btn  { display: none !important; }
  body  { background: white; color: black; }
}