* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Roboto, Arial, sans-serif; }

html, body { height: 100%; }

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  color: #fff;
  transition: color .3s;
}

/* ---------- BACKGROUND MODES ---------- */
#bgVideo { display: none; }
#bgOverlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: -1;
}

body[data-bg="video"] #bgVideo {
  display: block;
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: -2;
}
body[data-bg="white"] { background: #f4f4f4; }
body[data-bg="white"] #bgOverlay { background: transparent; }
body[data-bg="white"] { color: #111; }

body[data-bg="black"] { background: #000; }
body[data-bg="black"] #bgOverlay { background: transparent; }
body[data-bg="black"] { color: #fff; }

/* ---------- LIGHT / DARK THEME (UI chrome) ---------- */
body[data-theme="light"] .card,
body[data-theme="light"] .modal-box,
body[data-theme="light"] .bottom-nav,
body[data-theme="light"] .topbar {
  background: rgba(255,255,255,.85);
  color: #111;
}
body[data-theme="dark"] .card,
body[data-theme="dark"] .modal-box,
body[data-theme="dark"] .bottom-nav,
body[data-theme="dark"] .topbar {
  background: rgba(20,20,20,.75);
  color: #fff;
}

/* ---------- TOPBAR ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  backdrop-filter: blur(8px);
}
.logo { font-size: 1.3rem; font-weight: 700; letter-spacing: .5px; }
.logo span { font-weight: 300; opacity: .7; }
.icon-btn {
  background: transparent; border: none; cursor: pointer;
  width: 34px; height: 34px;
}
.icon-btn svg { width: 100%; height: 100%; fill: currentColor; }

/* ---------- MAIN / PAGES ---------- */
#app {
  padding: 24px 16px 110px;
  max-width: 480px;
  margin: 0 auto;
  min-height: calc(100vh - 70px);
}
.page { display: none; animation: fade .25s ease; }
.page.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px);} to { opacity: 1; transform: none; } }

.card {
  border-radius: 20px;
  padding: 22px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 30px rgba(0,0,0,.25);
}
.card h2 { margin-bottom: 6px; font-size: 1.2rem; }
.card .sub { opacity: .7; font-size: .85rem; margin-bottom: 16px; }

/* ---------- FORM ELEMENTS ---------- */
input[type="text"], input[type="password"], select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(128,128,128,.4);
  background: rgba(128,128,128,.12);
  color: inherit;
  font-size: .95rem;
  margin-bottom: 14px;
  outline: none;
}
input::placeholder { color: currentColor; opacity: .55; }

.row { display: flex; gap: 12px; }
.field { flex: 1; }
.field label { display: block; font-size: .78rem; opacity: .7; margin-bottom: 6px; }

/* ---------- BUTTONS (monochrome) ---------- */
.btn {
  display: block;
  width: 100%;
  padding: 13px;
  margin-top: 8px;
  border-radius: 12px;
  border: 1.5px solid currentColor;
  background: currentColor;
  color: inherit;
  font-weight: 600;
  cursor: pointer;
  font-size: .95rem;
  position: relative;
}
/* trick: fill with contrasting solid via pseudo using theme */
body[data-theme="dark"] .btn { background: #fff; color: #000; border-color: #fff; }
body[data-theme="light"] .btn { background: #000; color: #fff; border-color: #000; }

.btn.small { width: auto; padding: 10px 18px; margin-top: 0; }
.btn.transparent {
  background: transparent !important;
  color: inherit !important;
  border: 1.5px solid currentColor;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-group { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }

/* ---------- TRIAL / RESULT ---------- */
.trial-banner {
  margin-top: 16px;
  font-size: .8rem;
  text-align: center;
  opacity: .8;
}
.result-box {
  margin-top: 18px;
  padding: 14px;
  border-radius: 12px;
  background: rgba(128,128,128,.15);
  font-size: .85rem;
  word-break: break-all;
}
.result-box a { color: inherit; text-decoration: underline; font-weight: 600; }
.hidden { display: none !important; }

/* ---------- SEARCH ---------- */
.search-bar { display: flex; gap: 10px; margin-bottom: 16px; }
.search-bar input { margin-bottom: 0; }
.search-results { display: flex; flex-direction: column; gap: 12px; max-height: 55vh; overflow-y: auto; }
.result-item {
  display: flex; gap: 12px; align-items: center;
  background: rgba(128,128,128,.12);
  border-radius: 12px; padding: 10px;
}
.result-item img { width: 56px; height: 56px; border-radius: 8px; object-fit: cover; }
.result-item .meta { flex: 1; font-size: .8rem; }
.result-item .meta b { display: block; font-size: .85rem; margin-bottom: 2px; }

/* ---------- PROFILE ---------- */
.profile-view { text-align: center; }
.avatar-circle {
  width: 72px; height: 72px; border-radius: 50%;
  background: rgba(128,128,128,.3);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
  font-size: 1.6rem; font-weight: 700;
}
.premium-badge {
  display: inline-block; margin-top: 10px;
  padding: 4px 12px; border-radius: 20px;
  border: 1px solid currentColor; font-size: .75rem;
}

/* ---------- SETTINGS ---------- */
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; border-bottom: 1px solid rgba(128,128,128,.25);
}
.toggle-pair { display: flex; gap: 8px; }
.toggle-opt { width: auto; padding: 8px 14px; }
.toggle-opt.active { outline: 2px solid currentColor; }

/* ---------- BOTTOM NAV ---------- */
.bottom-nav {
  position: fixed; bottom: 14px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 6px;
  padding: 8px 10px;
  border-radius: 40px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
  z-index: 10;
}
.nav-btn {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  background: transparent; border: none; cursor: pointer;
  padding: 8px 18px; border-radius: 30px;
  color: inherit; opacity: .55;
  font-size: .68rem;
}
.nav-btn svg { width: 22px; height: 22px; fill: currentColor; }
.nav-btn.active { opacity: 1; }
body[data-theme="dark"] .nav-btn.active { background: #fff; color: #000; }
body[data-theme="light"] .nav-btn.active { background: #000; color: #fff; }

/* ---------- MODAL (ads) ---------- */
.modal {
  position: fixed; inset: 0; z-index: 50;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.6);
}
.modal-box {
  width: 88%; max-width: 360px;
  border-radius: 18px; padding: 26px;
  text-align: center;
  backdrop-filter: blur(14px);
}
.ad-tag {
  display: inline-block; font-size: .65rem; letter-spacing: 1px;
  padding: 3px 10px; border-radius: 10px;
  border: 1px solid currentColor; margin-bottom: 10px; opacity: .7;
}
.ad-timer { margin: 14px 0; font-size: .85rem; opacity: .8; }

/* ---------- TOAST ---------- */
.toast {
  position: fixed; bottom: 90px; left: 50%; transform: translateX(-50%);
  background: rgba(20,20,20,.9); color: #fff;
  padding: 10px 18px; border-radius: 20px;
  font-size: .82rem; z-index: 60;
}