/**
 * signup.css — Liftbook 회원가입 페이지
 * 다크/라이트 테마 지원
 */

/* ===== 변수 ===== */
:root {
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --surface-light: #222240;
  --primary: #6c5ce7;
  --primary-glow: rgba(108, 92, 231, 0.4);
  --accent: #00cec9;
  --text: #f0f0f0;
  --text-dim: #8888aa;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.1);
}

body.light-theme {
  --bg: #faf7f3;
  --surface: #ffffff;
  --surface-light: #f2ece5;
  --primary: #7c6bc4;
  --primary-glow: rgba(124, 107, 196, 0.18);
  --accent: #3d9b8f;
  --text: #2c2a35;
  --text-dim: #8a8698;
  --border-subtle: rgba(120, 100, 80, 0.08);
  --input-bg: rgba(0, 0, 0, 0.03);
  --input-border: rgba(120, 100, 80, 0.15);
}

/* ===== 리셋 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}

/* ===== 컨테이너 ===== */
.signup-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
  position: relative;
}

/* ===== 카드 ===== */
.signup-card {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 36px 28px 28px;
}

/* ===== 로고 ===== */
.signup-logo {
  text-align: center;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}
.signup-logo .logo-lift { color: var(--primary); }
.signup-logo .logo-book { color: var(--accent); }

.signup-sub {
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 28px;
  letter-spacing: 1px;
}

/* ===== 폼 ===== */
.signup-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.signup-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: 12px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}
.signup-input::placeholder {
  color: var(--text-dim);
}
.signup-input:focus {
  border-color: var(--primary);
}

/* ===== 가입 버튼 ===== */
.signup-btn {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  border: none;
  border-radius: 12px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  margin-top: 6px;
  transition: opacity 0.15s;
}
.signup-btn:active {
  opacity: 0.85;
}

/* ===== 하단 ===== */
.signup-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  justify-content: center;
  gap: 6px;
}
.signup-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.15s;
}
.signup-link:hover {
  color: var(--accent);
}

/* ===== 테마 토글 ===== */
.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: var(--surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: background 0.2s;
}
.theme-toggle:active {
  background: var(--surface-light);
}
.theme-icon {
  line-height: 1;
}