:root {
  --bg-dark: #0b0d12;
  --bg-card: #12151e;
  --bg-input: #171b26;
  --border-color: #202636;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --accent-red: #f43f5e;
  --accent-red-hover: #e11d48;
  --accent-green: #20c997;
  --accent-yellow: #eab308;
  --accent-yellow-hover: #d9a306;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, system-ui, sans-serif; }
body { background-color: var(--bg-dark); color: var(--text-main); min-height: 100vh; overflow-x: hidden; }
.hidden { display: none !important; }

/* --- ЭКРАН ПРИВЕТСТВИЯ (Центрирование) --- */
#welcome-screen {
  display: flex; justify-content: center; align-items: center;
  min-height: 100vh; width: 100%;
  background: radial-gradient(circle at center, #171b26 0%, var(--bg-dark) 100%);
  position: fixed; top: 0; left: 0; z-index: 50;
}

.welcome-card {
  background: var(--bg-card); padding: 45px; border-radius: 20px;
  border: 1px solid var(--border-color); text-align: center;
  max-width: 500px; width: 90%; box-shadow: 0 15px 35px rgba(0,0,0,0.6);
}

.welcome-card h1 { font-size: 2.5rem; margin-bottom: 12px; color: var(--accent-red); font-weight: 900; letter-spacing: 1px; }
.welcome-card p { color: var(--text-muted); margin-bottom: 30px; font-size: 1.1rem; }
.btn-group { display: flex; flex-direction: column; gap: 15px; }

/* --- МОДАЛКИ (ВХОД / РЕГИСТРАЦИЯ) --- */
.modal-overlay { 
  position: fixed; top: 0; left: 0; width: 100%; height: 100%; 
  background: rgba(0,0,0,0.85); display: flex; align-items: center; 
  justify-content: center; z-index: 1000; backdrop-filter: blur(5px);
}

.modal-card { 
  background: var(--bg-card); border: 1px solid var(--border-color); 
  padding: 40px; border-radius: 20px; width: 95%; max-width: 550px; 
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.auth-tabs { display: flex; background: var(--bg-input); padding: 5px; border-radius: 12px; margin-bottom: 25px; }
.auth-tab { flex: 1; border: none; background: transparent; color: var(--text-muted); padding: 12px; cursor: pointer; border-radius: 9px; font-weight: bold; font-size: 1rem; transition: 0.2s; }
.auth-tab.active { background: var(--accent-red); color: white; }

.modal-card input {
    background: var(--bg-input); border: 1px solid var(--border-color);
    color: white; padding: 14px; border-radius: 8px; width: 100%; margin-bottom: 15px; outline: none; font-size: 1rem;
}
.modal-card input:focus { border-color: var(--accent-red); }

.alert-error { background: rgba(244, 63, 94, 0.15); border: 1px solid var(--accent-red); color: #fca5a5; padding: 12px; border-radius: 8px; font-size: 0.9rem; margin-bottom: 15px; text-align: center; }

/* --- КНОПКИ --- */
.btn-primary { 
    background: var(--accent-red); color: white; border: none; 
    border-radius: 10px; padding: 14px 30px; font-weight: 700; 
    cursor: pointer; transition: 0.2s; text-transform: uppercase;
    display: block; margin: 10px auto 0; width: fit-content; min-width: 240px;
}
.btn-primary:hover { background: var(--accent-red-hover); transform: translateY(-1px); box-shadow: 0 5px 15px rgba(244, 63, 94, 0.3); }

.btn-secondary { 
    background: var(--bg-input); color: var(--text-muted); 
    border: 1px solid var(--border-color); border-radius: 10px; 
    padding: 12px 25px; font-weight: 600; cursor: pointer; transition: 0.2s;
    display: block; margin: 10px auto 0;
}
.btn-secondary:hover { background: #202636; color: white; }

/* КНОПКА STEAM */
.btn-steam {
    background: #171a21; color: #ffffff; border: 1px solid #2a475e;
    border-radius: 10px; padding: 14px 30px; font-weight: 700;
    cursor: pointer; transition: 0.2s; text-transform: uppercase;
    display: flex; align-items: center; justify-content: center; gap: 12px;
    width: fit-content; min-width: 240px; margin: 0 auto;
}
.btn-steam i { font-size: 1.4rem; }
.btn-steam:hover { background: #2a475e; border-color: #66c0f4; box-shadow: 0 0 20px rgba(102, 192, 244, 0.2); }