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

:root {
  --bg: #080808; --green: #39ff85; --blue: #4d9fff; --orange: #ff8c42;
  --red: #ff4d4d; --card: #0e0e0e; --border: #1a1a1a; --border2: #222;
  --text: #e8e8e8; --muted: #444; --muted2: #666; --input-bg: #111;
}

html, body { min-height: 100%; background: var(--bg); color: var(--text); font-family: 'DM Sans', sans-serif; overflow-x: hidden; }

#bg-grid {
  position: fixed; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.013) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.013) 1px, transparent 1px);
  background-size: 90px 90px; pointer-events: none; z-index: 0;
}

#bg-glow {
  position: fixed; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 15% 85%, rgba(57,255,133,0.045) 0%, transparent 65%), radial-gradient(ellipse 45% 50% at 85% 15%, rgba(77,159,255,0.035) 0%, transparent 65%);
  pointer-events: none; z-index: 0;
}

#logo { position: fixed; top: 28px; left: 36px; font-family: 'Syne', sans-serif; font-weight: 800; font-size: 1rem; color: var(--text); text-decoration: none; letter-spacing: -0.02em; z-index: 10; opacity: 0.7; transition: opacity 0.2s; }
#logo:hover { opacity: 1; }

#scene { position: relative; z-index: 1; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 80px 24px 60px; gap: 0; }

#auth-tabs { display: flex; gap: 6px; margin-bottom: 20px; flex-wrap: wrap; justify-content: center; }

.auth-tab {
  background: none; border: 1px solid var(--border2); color: var(--muted2);
  border-radius: 100px; padding: 8px 18px; font-size: 0.76rem;
  font-family: 'DM Sans', sans-serif; cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s; letter-spacing: 0.01em;
}
.auth-tab:hover { color: var(--text); border-color: #333; }
.auth-tab.active { background: #161616; color: var(--text); border-color: #333; }
.admin-tab { color: var(--orange); border-color: rgba(255,140,66,0.2); }
.admin-tab:hover { border-color: var(--orange); }
.admin-tab.active { background: rgba(255,140,66,0.06); color: var(--orange); border-color: rgba(255,140,66,0.35); }

.auth-card {
  display: none; flex-direction: column; gap: 22px;
  background: var(--card); border: 1px solid var(--border2); border-radius: 18px;
  padding: 40px 36px; width: 420px; max-width: calc(100vw - 40px);
  opacity: 0; transform: translateY(10px);
}

.auth-card.active-card {
  display: flex;
  animation: cardIn 0.45s cubic-bezier(0.16,1,0.3,1) forwards;
}

@keyframes cardIn { to { opacity: 1; transform: translateY(0); } }

.card-title { font-family: 'Syne', sans-serif; font-size: 1.5rem; font-weight: 800; letter-spacing: -0.03em; }
.card-sub { font-size: 0.82rem; color: var(--muted2); margin-top: -14px; font-weight: 300; }

.field-group { display: flex; flex-direction: column; gap: 8px; }
.field-group label { font-size: 0.7rem; color: var(--muted2); letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500; }
.field-group input {
  background: var(--input-bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 13px 16px; font-size: 0.9rem; color: var(--text); font-family: 'DM Sans', sans-serif;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s; width: 100%;
}
.field-group input::placeholder { color: #2a2a2a; }
.field-group input:focus { border-color: rgba(57,255,133,0.3); box-shadow: 0 0 0 3px rgba(57,255,133,0.05); }
.field-group input.error { border-color: rgba(255,77,77,0.4); box-shadow: 0 0 0 3px rgba(255,77,77,0.05); }

.btn-main {
  border: none; border-radius: 100px; padding: 14px 28px;
  font-family: 'Syne', sans-serif; font-weight: 700; font-size: 0.88rem;
  letter-spacing: 0.02em; cursor: pointer; transition: background 0.2s, transform 0.15s, box-shadow 0.2s; margin-top: 4px;
}
.btn-main:hover { transform: scale(1.02); }
.btn-main:active { transform: scale(0.99); }
.btn-main:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.green-btn { background: var(--green); color: #000; }
.green-btn:hover { background: #fff; box-shadow: 0 0 24px rgba(57,255,133,0.2); }
.red-btn { background: var(--red); color: #fff; }
.red-btn:hover { background: #ff6b6b; box-shadow: 0 0 24px rgba(255,77,77,0.2); }

#toast {
  position: fixed; bottom: 36px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #151515; border: 1px solid var(--border2); border-radius: 100px;
  padding: 12px 24px; font-size: 0.82rem; color: var(--text);
  opacity: 0; pointer-events: none; transition: opacity 0.3s, transform 0.3s; z-index: 100; white-space: nowrap;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.error { border-color: rgba(255,77,77,0.3); color: #ff6b6b; }
#toast.success { border-color: rgba(57,255,133,0.3); color: var(--green); }