/* /assets/css/zerogram.css */

/* ---------- Brand tokens ---------- */
:root{
  --bg: #050506;
  --panel: rgba(255,255,255,0.02);
  --text: #F5F5F7;
  --muted: rgba(245,245,247,0.65);

  /* 브랜드 포인트 컬러(여기만 바꾸면 전역 변경됨) */
  --accent: #7C3AED;      /* 보라 (예시) */
  --accent-2: #5B21B6;

  --line: rgba(255,255,255,0.20);
  --line-2: rgba(255,255,255,0.12);

  --radius: 18px;
  --shadow: 0 18px 60px rgba(0,0,0,0.55);

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}

/* ---------- Base ---------- */
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--font);
  background: radial-gradient(1000px 700px at 50% -20%, rgba(124,58,237,0.18), transparent 55%),
              radial-gradient(900px 600px at 100% 20%, rgba(255,255,255,0.05), transparent 55%),
              var(--bg);
  color: var(--text);
}

/* ---------- Layout helpers ---------- */
.zg-auth{
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:48px 18px;
}

.zg-auth-card{
  width:min(520px, 100%);
  padding:42px 34px 30px;
  border-radius: var(--radius);
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.zg-brand-top{
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom: 26px;
}

.zg-brand-top img{
  height: 44px;
  width:auto;
  opacity:0.92;
}

.zg-title{
  margin: 0 0 6px;
  font-size: 40px;
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-align:left;
}

.zg-sub{
  margin: 0 0 26px;
  color: var(--muted);
  font-size: 14px;
}

.zg-sub a{
  color: var(--accent);
  text-decoration:none;
}
.zg-sub a:hover{ text-decoration:underline; }

/* ---------- Form ---------- */
.zg-form{
  display:flex;
  flex-direction:column;
  gap: 18px;
}

.zg-field label{
  display:block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.zg-input{
  width:100%;
  background: transparent;
  color: var(--text);
  border: none;
  border-bottom: 2px solid var(--line);
  padding: 10px 0 12px;
  font-size: 18px;
  outline:none;
}

.zg-input::placeholder{
  color: rgba(245,245,247,0.25);
}

.zg-input:focus{
  border-bottom-color: var(--accent);
}

/* ---------- Checkbox row ---------- */
.zg-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top: 6px;
}

.zg-check{
  display:flex;
  align-items:center;
  gap:10px;
  color: var(--muted);
  font-size: 13px;
}

.zg-check input{
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

/* ---------- Button ---------- */
.zg-btn{
  width:100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  padding: 14px 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor:pointer;
  transition: transform .04s ease, border-color .2s ease, background .2s ease;
}

.zg-btn:hover{
  border-color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.04);
}

.zg-btn:active{ transform: translateY(1px); }

.zg-link{
  color: var(--accent);
  text-decoration:none;
  font-size: 13px;
}
.zg-link:hover{ text-decoration:underline; }

/* ---------- Alerts ---------- */
.zg-alert{
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  font-size: 13px;
}
.zg-alert.error{
  border-color: rgba(239,68,68,0.35);
  background: rgba(239,68,68,0.08);
  color: rgba(255,255,255,0.85);
}

/* ---------- Footer mark ---------- */
.zg-footer{
  margin-top: 26px;
  text-align:center;
  color: rgba(245,245,247,0.35);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: lowercase;
}

/* Mobile tweak */
@media (max-width: 480px){
  .zg-auth-card{ padding: 34px 22px 24px; }
  .zg-title{ font-size: 34px; }
}