/**
 * 小堡家族 — 登入頁專用樣式（Glassmorphism）
 * 僅由 index.html / login.php 載入，不影響系統內頁。
 */

/* ── 色彩變數 ─────────────────────────────────────────────── */
:root {
  --blue-primary: #2563EB;
  --blue-dark: #1E3A8A;
  --blue-light: #60A5FA;
  --glass-bg: rgba(255, 255, 255, 0.4);
  --glass-border: rgba(255, 255, 255, 0.55);
  --shadow-soft: rgba(37, 99, 235, 0.15);
  --shadow-card: 0 16px 48px rgba(37, 99, 235, 0.12);
  --warn-red: #DC2626;
  --warn-bg: rgba(254, 226, 226, 0.85);
  --text-main: #1E3A8A;
  --text-sub: #2563EB;
  --text-muted: #64748B;
  --input-bg: rgba(255, 255, 255, 0.82);
  --font-sans: "Segoe UI", "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
}

/* ── 重設與基底 ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background-color: #DBEAFE;
  background-image: url('../images/background_直式.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
}

/* 已有背景圖時隱藏裝飾光球 */
.login-page__orbs {
  display: none;
}

.login-page__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  animation: orb-float 12s ease-in-out infinite;
}

.login-page__orb--1 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, var(--blue-light) 0%, transparent 70%);
  top: -60px;
  left: -40px;
}

.login-page__orb--2 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, #93C5FD 0%, transparent 70%);
  bottom: 10%;
  right: -80px;
  animation-delay: -4s;
}

.login-page__orb--3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, #FFFFFF 0%, var(--blue-light) 50%, transparent 80%);
  top: 40%;
  left: 50%;
  transform: translateX(-50%);
  animation-delay: -7s;
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(12px, -18px) scale(1.05); }
  66% { transform: translate(-10px, 14px) scale(0.96); }
}

/* ── 主容器 ───────────────────────────────────────────────── */
.login-page__shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 560px;
}

/* ── 玻璃擬態卡片（手機／平板：全透明）──────────────────────── */
.login-card {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  border-radius: 32px;
  box-shadow: none;
  padding: 1.25rem 2rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.login-card__brand,
.login-card__main {
  width: 100%;
}

.login-card__main {
  display: flex;
  flex-direction: column;
}

/* ── 皇冠 LOGO ────────────────────────────────────────────── */
.login-card__logo-wrap {
  margin: 0 auto 0.5rem;
  width: 156px;
  height: 156px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: crown-float 3.5s ease-in-out infinite;
}

.login-card__logo {
  width: 100%;
  height: auto;
  max-height: 156px;
  object-fit: contain;
  filter: drop-shadow(0 8px 20px var(--shadow-soft));
}

@keyframes crown-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ── 標題區 ───────────────────────────────────────────────── */
.login-card__title {
  margin: 0 0 0.35rem;
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.06em;
}

.login-card__subtitle-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.login-card__subtitle-line {
  flex: 1;
  max-width: 72px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-light), transparent);
  border-radius: 1px;
}

.login-card__subtitle {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--text-sub);
  white-space: normal;
  line-height: 1.3;
}

/* 電腦版橫式左欄標語（預設隱藏） */
.login-card__tagline {
  display: none;
  margin: 0;
}

.login-page__env-bar[hidden] { display: none; }

.login-page__env-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: linear-gradient(90deg, #fdba74 0%, #fb923c 50%, #f97316 100%);
  border-bottom: 2px solid #c2410c;
  color: #7c2d12;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.45;
  box-shadow: 0 4px 14px rgba(124, 45, 18, 0.22);
}

.login-page__env-bar strong {
  display: inline-block;
  margin-right: 0.35rem;
  padding: 0.1rem 0.45rem;
  border-radius: 0.35rem;
  background: rgba(255, 255, 255, 0.55);
  font-size: 1rem;
  letter-spacing: 0.08em;
}

body.login-page.login-page--staging {
  padding-top: 3.25rem;
}

/* ── 紅色提示框 ─────────────────────────────────────────────── */
.login-card__alert {
  margin: 0 0 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  background: var(--warn-bg);
  border: 1px solid rgba(220, 38, 38, 0.25);
  color: var(--warn-red);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: left;
}

.login-card__alert-icon {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
}

/* ── 錯誤訊息 ─────────────────────────────────────────────── */
.login-card__error {
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  background: rgba(254, 226, 226, 0.95);
  border: 1px solid rgba(220, 38, 38, 0.35);
  color: var(--warn-red);
  font-size: 1rem;
  text-align: left;
}

.login-card__error[hidden] { display: none; }

/* ── 表單欄位 ─────────────────────────────────────────────── */
.login-form__group {
  margin-bottom: 1rem;
  text-align: left;
}

.login-form__field {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: 60px;
  padding: 0 1rem;
  background: var(--input-bg);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: 16px;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.8);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form__field:focus-within {
  border-color: var(--blue-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.login-form__icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  color: var(--blue-primary);
}

.login-form__input {
  flex: 1;
  min-width: 0;
  height: 100%;
  border: none;
  background: transparent;
  font-size: 1.125rem;
  color: var(--text-main);
  outline: none;
}

.login-form__input::placeholder {
  color: #94A3B8;
}

/* 密碼顯示切換 */
.login-form__pw-toggle {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s, transform 0.15s;
}

.login-form__pw-toggle svg {
  width: 26px;
  height: 26px;
  stroke-width: 2.25;
}

.login-form__pw-toggle svg[hidden] {
  display: none !important;
}

.login-form__pw-toggle:hover {
  color: var(--blue-primary);
  background: rgba(37, 99, 235, 0.1);
}

.login-form__pw-toggle:active {
  transform: scale(0.94);
  background: rgba(37, 99, 235, 0.14);
}

/* ── 登入按鈕 ─────────────────────────────────────────────── */
.login-form__submit {
  width: 100%;
  height: 72px;
  margin-top: 0.5rem;
  border: none;
  border-radius: 20px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #FFFFFF;
  cursor: pointer;
  background: linear-gradient(135deg, var(--blue-light) 0%, var(--blue-primary) 45%, var(--blue-dark) 100%);
  box-shadow: 0 10px 28px var(--shadow-soft), 0 4px 12px rgba(30, 58, 138, 0.2);
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}

.login-form__submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(37, 99, 235, 0.28), 0 6px 16px rgba(30, 58, 138, 0.22);
  filter: brightness(1.05);
}

.login-form__submit:active:not(:disabled) {
  transform: translateY(1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2), inset 0 2px 6px rgba(30, 58, 138, 0.25);
}

.login-form__submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* ── 底部版權聲明 ───────────────────────────────────────────── */
.login-card__footer {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(96, 165, 250, 0.35);
  text-align: center;
}

.login-card__footer-text {
  margin: 0;
  color: var(--blue-primary);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
}

/* ── 響應式微調 ───────────────────────────────────────────── */
@media (max-width: 1023px) {
  .login-card__subtitle {
    font-size: 2rem; /* 較預設 2.5rem 縮小 20% */
  }

  .login-card__alert {
    font-size: 0.9rem; /* 較預設 1rem 縮小 10% */
  }

  .login-card__alert-icon {
    width: 0.9rem;
    height: 0.9rem;
  }
}

@media (max-width: 375px) {
  .login-card {
    padding: 1rem 1.25rem 1.75rem;
    border-radius: 28px;
  }

  .login-card__logo-wrap {
    width: 125px;
    height: 125px;
  }

  .login-card__logo {
    max-height: 125px;
  }
}

@media (min-width: 768px) {
  body.login-page {
    padding: 2rem;
  }
}

/* 電腦版：橫式雙欄 */
@media (min-width: 1024px) {
  body.login-page {
    background-image: url('../images/background_橫式.png');
  }

  .login-page__shell {
    max-width: 960px;
  }

  .login-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
    gap: 0;
    padding: 2.5rem 2.75rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-card);
  }

  .login-card__brand {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    align-self: start;
    gap: 0;
    width: 100%;
    padding: 0 1.5rem 0.5rem;
    text-align: center;
    border-right: 1px solid rgba(96, 165, 250, 0.35);
  }

  .login-card__title,
  .login-card__subtitle,
  .login-card__tagline {
    width: 100%;
    margin: 0;
    text-align: center;
  }

  .login-card__subtitle-row {
    width: 100%;
    justify-content: center;
    margin: 0.2rem 0 0;
  }

  .login-card__subtitle-line {
    max-width: 56px;
  }

  .login-card__logo-wrap {
    width: 180px;
    height: 180px;
    margin: 0 auto;
  }

  .login-card__tagline {
    display: block;
    position: static;
    width: 100%;
    margin: 0.4rem 0 0;
    padding: 0;
    font-family: "Microsoft JhengHei", "Heiti TC", "PingFang TC", "Noto Sans TC", sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.3;
    text-align: center;
    letter-spacing: 0.04em;
  }

  .login-card__main {
    justify-content: center;
    align-self: start;
    padding: 0.5rem 1.5rem 0.5rem 2rem;
    text-align: left;
  }

  .login-card__logo {
    max-height: 180px;
  }
}