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

/* ── Dark theme (default) ── */
:root {
  --bg:            #0e1117;
  --surface:       #161b27;
  --surface2:      #1d2235;
  --nav-bg:        #111827;
  --nav-border:    rgba(255,255,255,0.10);
  --border:        rgba(255,255,255,0.08);
  --border-hover:  rgba(255,255,255,0.20);
  --text:          #f0f2f5;
  --text-sub:      #b0b8c8;
  --muted:         #7a8494;
  --accent:        #4a8cff;
  --accent-hover:  #3a7aee;
  --danger:        #e74c3c;
  --danger-hover:  #c0392b;
  --glow-a:        rgba(74,140,255,0.10);
  --glow-b:        rgba(120,80,255,0.08);
  --input-bg:      rgba(255,255,255,0.05);
  --input-focus:   rgba(255,255,255,0.22);
  --toast-bg:      #2a3044;
  --toast-border:  rgba(255,255,255,0.10);
  --err-bg:        rgba(255,92,92,0.10);
  --err-border:    rgba(255,92,92,0.25);
  --modal-overlay: rgba(0,0,0,0.60);
  --nav-h:         60px;
}

/* ── Light theme ── */
html.light {
  --bg:            #e8ecf4;
  --surface:       #ffffff;
  --surface2:      #f0f3f9;
  --nav-bg:        #ffffff;
  --nav-border:    rgba(0,0,0,0.10);
  --border:        rgba(0,0,0,0.09);
  --border-hover:  rgba(0,0,0,0.20);
  --text:          #1a1f2e;
  --text-sub:      #4a5368;
  --muted:         #8a93a8;
  --accent:        #2f7aff;
  --accent-hover:  #1f6aef;
  --danger:        #d93030;
  --danger-hover:  #b02020;
  --glow-a:        rgba(47,122,255,0.06);
  --glow-b:        rgba(100,60,220,0.04);
  --input-bg:      rgba(0,0,0,0.03);
  --input-focus:   rgba(0,0,0,0.14);
  --toast-bg:      #1a2040;
  --toast-border:  rgba(255,255,255,0.12);
  --err-bg:        rgba(217,48,48,0.08);
  --err-border:    rgba(217,48,48,0.22);
  --modal-overlay: rgba(0,0,0,0.35);
}

/* ── Base ── */
body {
  font-family: sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 70% 20%, var(--glow-a) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 20% 80%, var(--glow-b) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

/* ── Navbar ── */
nav.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 301;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background 0.3s, border-color 0.3s;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

html.light nav.navbar {
  box-shadow: 0 2px 12px rgba(0,0,0,0.07);
}

.nav-brand {
  display: flex;
  flex-direction: column;
}

.nav-brand strong {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav-brand span {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 1px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* Theme toggle — now lives in navbar */
/* .theme-toggle {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-sub);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s, background 0.3s, transform 0.5;
  flex-shrink: 0;
  outline: 2px solid transparent;
  outline-offset: 2px;
  text-decoration: none;
} */

.icon-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-sub);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.3s;
  flex-shrink: 0;
  outline: 2px solid transparent;
  outline-offset: 2px;
  text-decoration: none;
}

.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
  outline-color: rgba(74, 140, 255, 0.35);
}

.theme-toggle {
  transition:  transform 0.5s;

}

.theme-toggle:hover {
  transform: rotate(90deg);
}

/* ── Shared inputs ── */
input {
  font-family: sans-serif;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  outline: none;
  transition: border-color 0.18s, background 0.3s;
}

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

/* ── Focus ring for keyboard nav ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--toast-bg);
  border: 1px solid var(--toast-border);
  color: #fff;
  padding: 0.6rem 1.3rem;
  border-radius: 10px;
  font-size: 0.88rem;
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
  white-space: nowrap;
  z-index: 1000;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Tab content: gap between sections ── */
.tab-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ════════════════════════════════════════════
   HAMBURGER BUTTON
   ════════════════════════════════════════════ */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 7px 6px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  z-index: 302;
  position: relative;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.32s cubic-bezier(.77,0,.18,1),
              opacity   0.22s ease;
}

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

/* ════════════════════════════════════════════
   BACKDROP
   ════════════════════════════════════════════ */
.mobile-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.48);
  z-index: 299;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.32s;
}

.mobile-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

/* ════════════════════════════════════════════
   SLIDE-IN MENU PANEL
   ════════════════════════════════════════════ */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(300px, 82vw);
  z-index: 300;
  background: var(--nav-bg);
  padding-top: var(--nav-h);
  border-left: 1px solid var(--nav-border);
  box-shadow: -8px 0 40px rgba(0,0,0,0.28);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  /* always rendered, slide out to the right */
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.32s cubic-bezier(.77,0,.18,1),
              visibility 0s linear 0.32s;
}

.mobile-menu.open {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.32s cubic-bezier(.77,0,.18,1),
              visibility 0s linear 0s;
}

/* Header row inside panel */
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--nav-border);
  flex-shrink: 0;
}

.mobile-menu-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

/* Nav items */
.mobile-menu-nav {
  display: flex;
  flex-direction: column;
  padding: 1rem 0.9rem;
  gap: 0.4rem;
}

.mobile-menu-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  font-family: sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background 0.18s, border-color 0.18s;
}
.mobile-menu-item:hover { background: var(--surface); border-color: var(--border-hover); }

.mobile-menu-item.danger {
  background: rgba(231,76,60,0.08);
  border-color: rgba(231,76,60,0.25);
  color: var(--danger);
}
.mobile-menu-item.danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }

.mmi-icon  { font-size: 1.1rem; width: 24px; text-align: center; flex-shrink: 0; }
.mmi-label { flex: 1; }

/* ════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════ */
@media (max-width: 640px) {
  .hamburger { display: flex; }
  .nav-right  { display: none !important; }
}