/* Navbar */
.navbar { background: #0f172a; color: #fff; padding: 12px 0; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.nav-container { max-width: 1400px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 24px; }
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #fff; font-size: 1.1rem; }
.logo-mark { background: #c2410c; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 6px; font-weight: 700; color: #fff; }
.logo-text { font-weight: 500; }
.logo-text strong { font-weight: 700; }
.nav-search { flex: 1; max-width: 400px; }
.nav-search input { width: 100%; padding: 8px 14px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.15); border-radius: 8px; color: #fff; font-size: 0.95rem; box-sizing: border-box; }
.nav-search input::placeholder { color: #94a3b8; }
.nav-search input:focus { outline: none; background: rgba(255,255,255,0.15); }
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-link { color: #cbd5e1; text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.nav-link:hover { color: #fff; }
.btn-nav-primary { background: #c2410c; color: #fff; padding: 8px 16px; border-radius: 8px; text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.btn-nav-primary:hover { background: #9a3412; }
.nav-avatar { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: #c2410c; color: #fff; font-weight: 700; text-decoration: none; }

/* Footer */
.footer { background: #0f172a; color: #cbd5e1; padding: 60px 0 20px; margin-top: 60px; }
.footer-container { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h3 { color: #fff; margin: 0 0 16px; font-size: 1rem; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { padding: 4px 0; font-size: 0.9rem; }
.footer ul li a { color: #94a3b8; text-decoration: none; }
.footer ul li a:hover { color: #fff; }
.footer p { color: #94a3b8; font-size: 0.9rem; line-height: 1.6; margin: 0; }
.footer-bottom { padding-top: 20px; margin-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 0.85rem; color: #64748b; display: block; }

/* Course card */
.course-card { display: block; background: #fff; border-radius: 12px; overflow: hidden; text-decoration: none; color: inherit; box-shadow: 0 1px 3px rgba(0,0,0,0.05); transition: all 0.2s; }
.course-card:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.1); }
.course-card-thumb { background: linear-gradient(135deg, #0f172a, #334155); height: 140px; position: relative; }
.course-card-badge { position: absolute; top: 12px; left: 12px; background: #c2410c; color: #fff; padding: 4px 10px; border-radius: 6px; font-weight: 700; font-size: 0.85rem; }
.course-card-body { padding: 16px 18px 18px; }
.course-card-body h3 { margin: 0 0 10px; font-size: 1rem; line-height: 1.3; color: #1e293b; }
.course-card-meta { display: flex; gap: 12px; font-size: 0.85rem; color: #64748b; margin-bottom: 10px; }
.course-card-rating { font-size: 0.9rem; margin-bottom: 12px; }
.stars { color: #c2410c; }
.rating-num { font-weight: 600; color: #1e293b; }
.review-count { color: #94a3b8; }
.course-card-footer { font-size: 0.9rem; }
.sub-indicator { color: #c2410c; font-weight: 600; }
.free-indicator { color: #10b981; font-weight: 600; }
.price-indicator { color: #1e293b; font-weight: 700; font-size: 1.05rem; }

/* Toast */
.toast { position: fixed; bottom: 30px; right: 30px; background: #1e293b; color: #fff; padding: 14px 22px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); opacity: 0; transform: translateY(20px); transition: all 0.3s; z-index: 9999; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast-success { background: #059669; }
.toast-error { background: #dc2626; }

/* Container */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

@media (max-width: 900px) { .nav-search { display: none; } .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ============================================ */
/* NAV & FOOTER ENHANCEMENT LAYER (Udacity-inspired) */
/* Purely additive - safe to remove if needed   */
/* ============================================ */

.navbar { background: linear-gradient(180deg, #0f172a 0%, #0b1322 100%); transition: box-shadow 240ms ease, background 240ms ease; }
.navbar.is-scrolled { box-shadow: 0 8px 24px rgba(0,0,0,0.35); }
.nav-logo { transition: transform 200ms ease; }
.nav-logo:hover { transform: translateY(-1px); }
.logo-mark { box-shadow: 0 4px 12px rgba(249,115,22,0.35); transition: box-shadow 200ms ease, transform 200ms ease; }
.nav-logo:hover .logo-mark { box-shadow: 0 6px 16px rgba(249,115,22,0.55); transform: rotate(-3deg); }
.nav-search input { transition: background 180ms ease, border-color 180ms ease, box-shadow 180ms ease; }
.nav-search input:hover { background: rgba(255,255,255,0.14); }
.nav-search input:focus { border-color: rgba(249,115,22,0.6); box-shadow: 0 0 0 3px rgba(249,115,22,0.20); }
.nav-link { position: relative; padding: 6px 2px; transition: color 180ms ease; }
.nav-link::after { content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: #c2410c; border-radius: 2px; transform: scaleX(0); transform-origin: center; transition: transform 220ms cubic-bezier(.2,.8,.2,1); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.btn-nav-primary { transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease; box-shadow: 0 2px 8px rgba(249,115,22,0.30); }
.btn-nav-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(249,115,22,0.45); }
.btn-nav-primary:active { transform: translateY(0); }
.nav-avatar { transition: transform 180ms ease, box-shadow 180ms ease; }
.nav-avatar:hover { transform: scale(1.05); box-shadow: 0 4px 12px rgba(249,115,22,0.45); }
.footer { background: linear-gradient(180deg, #0b1322 0%, #060b16 100%); position: relative; }
.footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(249,115,22,0.55), transparent); }
.footer h3 { letter-spacing: 0.02em; }
.footer a { transition: color 160ms ease, transform 160ms ease; display: block; padding: 4px 0; }
.footer a:hover { color: #c2410c; transform: translateX(2px); }
@media (max-width: 768px) {
  .nav-container { gap: 12px; padding: 0 16px; }
  .nav-search { display: none; }
  .nav-links { gap: 12px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}


/* ===== LOGO IMAGE ENHANCEMENT (SVG, transparent) ===== */
.logo-img {
  height: 44px;
  width: auto;
  max-width: 44px;
  object-fit: contain;
  display: block;
}
.nav-logo {
  gap: 12px;
}
.nav-logo .logo-img + .logo-text {
  font-size: 1.05rem;
  letter-spacing: 0.2px;
}

/* ============================== */
/* NAV ENHANCEMENTS — added by nav audit */
/* hamburger, active state, skip link, mobile drawer */
/* ============================== */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 8px 14px;
  background: #c2410c;
  color: #fff;
  font-weight: 600;
  border-radius: 0 0 6px 0;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

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

.nav-link.active,
.nav-link[aria-current="page"] {
  color: #fff !important;
  position: relative;
}
.nav-link.active::after,
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: #c2410c;
  border-radius: 2px;
}

.nav-link-button {
  background: transparent;
  border: 0;
  font: inherit;
  cursor: pointer;
  padding: 0;
}
.nav-link-button:hover { color: #fff; }

.nav-hamburger {
  display: none;
  background: transparent;
  border: 0;
  width: 40px;
  height: 40px;
  padding: 8px;
  cursor: pointer;
  margin-left: auto;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
}
.nav-hamburger-bar {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-hamburger-open .nav-hamburger-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-hamburger-open .nav-hamburger-bar:nth-child(2) { opacity: 0; }
.nav-hamburger-open .nav-hamburger-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

body.nav-drawer-open { overflow: hidden; }

@media (max-width: 900px) {
  .nav-hamburger { display: flex; }
  .nav-search { display: none; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: 280px;
    max-width: 85vw;
    height: 100vh;
    background: #0f172a;
    border-left: 1px solid rgba(255,255,255,0.08);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 72px 20px 24px;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 999;
    overflow-y: auto;
  }
  .nav-links.nav-links-open { transform: translateX(0); }
  .nav-links .nav-link,
  .nav-links .btn-nav-primary {
    padding: 14px 4px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    width: 100%;
    text-align: left;
    border-radius: 0;
  }
  .nav-links .btn-nav-primary {
    margin-top: 12px;
    border-radius: 6px;
    text-align: center;
    border-bottom: 0;
  }
  .nav-link.active::after,
  .nav-link[aria-current="page"]::after {
    left: 0; right: auto;
    bottom: auto; top: 50%;
    width: 3px; height: 60%;
    transform: translateY(-50%);
    border-radius: 2px;
  }
  .nav-avatar { align-self: flex-start; margin-top: 8px; }
}

/* Backdrop overlay when drawer is open */
@media (max-width: 900px) {
  body.nav-drawer-open::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 998;
  }
}


/* Cross-method navigation strip */
.method-strip {
  background: #f7f9fc;
  border-bottom: 1px solid #e5e9f0;
  padding: 8px 0;
  font-size: 14px;
}
.method-strip-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.method-strip-label {
  color: #6b7280;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 12px;
}
.method-strip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.method-strip-link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  text-decoration: none;
  color: #374151;
  transition: background 0.15s, color 0.15s;
}
.method-strip-link:hover {
  background: #e5e9f0;
  color: #111827;
}
.method-strip-link.active {
  background: #1e40af;
  color: #fff;
}
.method-strip-link.active .method-strip-name { color: #dbeafe; }
.method-strip-link strong { font-weight: 700; letter-spacing: 0.02em; }
.method-strip-name { color: #6b7280; font-size: 13px; }
@media (max-width: 600px) {
  .method-strip-name { display: none; }
  .method-strip-link { padding: 6px 10px; }
}


/* === Wave A: utility row, dropdown, account menu === */
.nav-utility { background: var(--dark, #0d1b2a); color: rgba(255,255,255,0.78); font-size: 12px; line-height: 1; border-bottom: 1px solid rgba(255,255,255,0.06); }
.nav-utility-inner { max-width: 1280px; margin: 0 auto; padding: 8px 24px; display: flex; align-items: center; gap: 12px; justify-content: flex-end; }
.nav-utility-tag { letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600; color: var(--secondary, #c2410c); }
.nav-utility-sep { opacity: 0.4; }
.nav-utility-link { color: rgba(255,255,255,0.78); text-decoration: none; transition: color 0.2s ease; }
.nav-utility-link:hover, .nav-utility-link:focus-visible { color: #fff; text-decoration: underline; }

/* Dropdown (Resources) */
.nav-dropdown { position: relative; display: inline-flex; }
.nav-dropdown-toggle { background: transparent; border: 0; cursor: pointer; padding: 8px 12px; color: inherit; font: inherit; display: inline-flex; align-items: center; gap: 4px; border-radius: 6px; transition: background 0.15s ease; }
.nav-dropdown-toggle:hover, .nav-dropdown-toggle:focus-visible { background: rgba(255,255,255,0.06); }
.nav-caret { font-size: 10px; opacity: 0.7; transition: transform 0.2s ease; display: inline-block; }
.nav-dropdown-open .nav-caret { transform: rotate(180deg); }
.nav-dropdown-menu { position: absolute; top: calc(100% + 8px); right: 0; min-width: 220px; background: #fff; color: var(--text, #333); border: 1px solid var(--border, #e0e0e0); border-radius: 12px; box-shadow: var(--ui-elev-3, 0 10px 25px rgba(0,0,0,0.15)); padding: 6px; opacity: 0; visibility: hidden; transform: translateY(-4px); transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s; z-index: 1000; }
.nav-dropdown-open > .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-item { display: block; padding: 10px 14px; color: var(--text, #333); text-decoration: none; border-radius: 8px; font-size: 14px; line-height: 1.3; background: transparent; border: 0; width: 100%; text-align: left; cursor: pointer; font-family: inherit; transition: background 0.12s ease; }
.nav-dropdown-item:hover, .nav-dropdown-item:focus-visible { background: rgba(232,130,26,0.08); color: var(--primary, #1a3c5e); outline: none; }
.nav-dropdown-divider { height: 1px; background: var(--border, #e0e0e0); margin: 6px 4px; }
.nav-dropdown-signout { color: var(--danger, #dc3545); }
.nav-dropdown-signout:hover, .nav-dropdown-signout:focus-visible { background: rgba(220,53,69,0.08); color: var(--danger, #dc3545); }

/* Account menu */
.nav-account { position: relative; display: inline-flex; margin-left: 8px; }
.nav-account-toggle { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); cursor: pointer; padding: 6px 10px 6px 6px; color: inherit; font: inherit; display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; transition: background 0.15s ease, border-color 0.15s ease; }
.nav-account-toggle:hover, .nav-account-toggle:focus-visible { background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.22); }
.nav-avatar-mini { width: 26px; height: 26px; border-radius: 50%; background: var(--secondary, #c2410c); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 12px; }
.nav-account-name { font-size: 13px; font-weight: 600; max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 720px) { .nav-account-name { display: none; } }

/* Mobile drawer behavior for dropdowns */
@media (max-width: 880px) {
  .nav-dropdown-menu { position: static; box-shadow: none; border: 0; background: transparent; padding: 0 0 8px 16px; opacity: 1; visibility: visible; transform: none; min-width: 0; }
  .nav-dropdown-menu .nav-dropdown-item { color: rgba(255,255,255,0.85); }
  .nav-dropdown-menu .nav-dropdown-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
  .nav-account-toggle { border-color: rgba(255,255,255,0.15); }
}
/* === Wave A v2: stronger overrides === */
.navbar .nav-dropdown-menu, .navbar .nav-account-menu { position: absolute !important; top: calc(100% + 8px); right: 0; min-width: 220px; background: #fff; color: var(--text, #333); border: 1px solid var(--border, #e0e0e0); border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.15); padding: 6px; opacity: 0 !important; visibility: hidden !important; transform: translateY(-4px); transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s; z-index: 1000; pointer-events: none; }
.navbar .nav-dropdown-open > .nav-dropdown-menu, .navbar .nav-dropdown-open > .nav-account-menu { opacity: 1 !important; visibility: visible !important; transform: translateY(0) !important; pointer-events: auto !important; }
.navbar .nav-account-toggle { display: inline-flex !important; align-items: center; gap: 8px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); padding: 6px 12px 6px 6px; border-radius: 999px; cursor: pointer; color: inherit; font: inherit; }
.navbar .nav-dropdown-toggle { display: inline-flex !important; align-items: center; gap: 4px; background: transparent; border: 0; padding: 8px 12px; cursor: pointer; color: inherit; font: inherit; border-radius: 6px; }
.navbar .nav-account, .navbar .nav-dropdown { position: relative !important; display: inline-flex !important; }
/* Mobile drawer override */
@media (max-width: 880px) {
  .navbar .nav-dropdown-menu, .navbar .nav-account-menu { position: static !important; box-shadow: none; border: 0; background: transparent !important; padding: 0 0 8px 16px; opacity: 0 !important; visibility: hidden !important; max-height: 0; overflow: hidden; transform: none !important; pointer-events: none; }
  .navbar .nav-dropdown-open > .nav-dropdown-menu, .navbar .nav-dropdown-open > .nav-account-menu { opacity: 1 !important; visibility: visible !important; max-height: 500px; pointer-events: auto !important; }
  .navbar .nav-dropdown-menu .nav-dropdown-item { color: rgba(255,255,255,0.85); }
}
/* Wave A v3: clear legacy white bg on .nav-dropdown wrapper */
.navbar .nav-dropdown, .navbar .nav-account { background: transparent !important; box-shadow: none !important; border: 0 !important; padding: 0 !important; }
/* Wave A v4: stack utility row above fixed navbar */
.nav-utility { position: fixed !important; top: 0 !important; left: 0; right: 0; z-index: 1001 !important; }
/* Wave A v4 (navfix): apply utility-row offset only if .nav-utility is present */
.navbar { top: 0 !important; }
body, body.has-navbar { padding-top: 64px !important; }
body:has(.nav-utility) .navbar { top: 30px !important; }
body:has(.nav-utility) { padding-top: 94px !important; }
@media (max-width: 720px) { .nav-utility { display: none !important; } .navbar { top: 0 !important; } body { padding-top: 64px !important; } }

/* Issue #55 footer brand column balance */
.footer .footer-brand p { margin-bottom: 14px; }
.footer .footer-tagline { color: #94a3b8; font-size: 0.85rem; line-height: 1.55; max-width: 420px; }
.footer .footer-contact { font-size: 0.9rem; line-height: 1.7; }
.footer .footer-contact a { color: #cbd5e1; text-decoration: none; }
.footer .footer-contact a:hover { color: #fff; text-decoration: underline; }