/* ==========================================
   全域設定與 Minecraft 變數
   ========================================== */
:root {
  --mc-green: #5b8731;        /* 草方塊綠 */
  --mc-green-light: #72a83e;
  --mc-dirt-dark: #573d26;     /* 泥土深棕 */
  --mc-dirt-light: #866043;    /* 泥土淺棕 */
  --mc-stone: #3c3c3c;         /* 石頭灰 */
  --mc-bedrock: #212121;       /* 基岩黑 */
  --mc-gold: #fcf350;          /* 標題/焦點黃 */
  --mc-border: #121212;        /* 像素黑邊 */
  --mc-btn-gray: #7d7d7d;      /* 按鈕灰 */
}

* {
  box-sizing: border-box;
  font-family: 'Press Start 2P', 'Noto Sans TC', sans-serif;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100vh;
  background-color: var(--mc-bedrock);
  color: #ffffff;
  display: flex;
  flex-direction: column;
}

/* ==========================================
   頂端欄 (與 index.css 完全一致)
   ========================================== */
.top-header {
  width: 100%;
  background-color: var(--mc-green);
  border-bottom: 6px solid var(--mc-stone);
  box-shadow: inset 0 -6px 0 var(--mc-green-light);
  text-align: center;
  padding: 16px 10px;
}

.header-title {
  color: #ffffff;
  font-size: 1.5rem;
  font-weight: bold;
  text-decoration: none;
  text-shadow: 3px 3px 0 var(--mc-border);
  letter-spacing: 2px;
  display: inline-block;
}

/* ==========================================
   登入容器 (畫面上完全置中)
   ========================================== */
.login-container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 15px;
}

/* 泥土卡片容器 */
.login-card {
  width: 100%;
  max-width: 380px;
  background-color: var(--mc-dirt-light);
  border: 4px solid var(--mc-border);
  box-shadow: inset -4px -4px 0 var(--mc-dirt-dark), 
              inset 4px 4px 0 #a27856;
  padding: 25px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  border-radius: 2px;
}

.login-title {
  margin: 0 0 10px 0;
  text-align: center;
  font-size: 1.3rem;
  color: var(--mc-gold);
  text-shadow: 2px 2px 0 var(--mc-border);
}

/* ==========================================
   輸入框樣式
   ========================================== */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 0.9rem;
  text-shadow: 1px 1px 0 var(--mc-border);
}

.input-group input {
  width: 100%;
  height: 44px;
  background-color: #000000;
  border: 3px solid var(--mc-stone);
  color: #ffffff;
  padding: 0 10px;
  font-size: 1rem;
  outline: none;
}

.input-group input:focus {
  border-color: var(--mc-gold);
}

/* ==========================================
   Minecraft 像素風格按鈕
   ========================================== */
.mc-button {
  margin-top: 10px;
  width: 100%;
  height: 48px;
  background-color: var(--mc-btn-gray);
  color: #ffffff;
  border: 3px solid var(--mc-border);
  box-shadow: inset -3px -3px 0 #3a3a3a, 
              inset 3px 3px 0 #b8b8b8;
  font-size: 1.1rem;
  font-weight: bold;
  text-shadow: 2px 2px 0 var(--mc-border);
  cursor: pointer;
  user-select: none;
}

/* 按鈕懸停狀態 */
.mc-button:hover {
  background-color: var(--mc-green);
  box-shadow: inset -3px -3px 0 #3b591f, 
              inset 3px 3px 0 var(--mc-green-light);
}

/* 按鈕點擊狀態 (按下效果) */
.mc-button:active {
  box-shadow: inset 3px 3px 0 #212121, 
              inset -3px -3px 0 #888888;
  transform: translateY(2px);
}

/* ==========================================
   手機畫面適應
   ========================================== */
@media (max-width: 380px) {
  .header-title {
    font-size: 1.2rem;
  }
  .login-card {
    padding: 20px 15px;
  }
}