:root {
  --bg-gradient-1: #300000;
  --bg-gradient-2: #800000;
  --overlay-color: rgba(30,0,0,0.65);
  --card-bg: rgba(255,255,255,0.06);
  --card-glow: rgba(255,0,0,0.06);
  --accent-1: #ff3b3b;
  --accent-2: #ff1e1e;
  --btn-text: #1b0303;
  --text-main: #ffffff;
  --text-muted: #ffffff;
  --loading-bg: rgba(20,0,0,0.95);
  --loading-text: #ff5b5b;
  --border-subtle: rgba(255,255,255,0.06);
  --focus-shadow: rgba(255,0,0,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "Poppins", system-ui;
  color: var(--text-main);
  background: linear-gradient(120deg, var(--bg-gradient-1), var(--bg-gradient-2));
  overflow: hidden;
}

/* Background slideshow */
.bg-layer {
  position: fixed; inset: 0;
  background-size: cover;
  background-position: center;
  transition: opacity 2.5s ease-in-out;
  z-index: -3;
}
.bg1 { background-image: url('angkatan58putra.png'); opacity: 1; }
.bg2 { background-image: url('angkatan58putri.png'); opacity: 0; }
.overlay { position: fixed; inset: 0; background: var(--overlay-color); z-index: -2; }

/* Layout */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  text-align: center;
}
.title {
  font-size: 1.5rem;
  margin-bottom: 14px;
  text-shadow: 0 0 10px rgba(255,0,0,0.3);
}

/* Tabs */
.tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}
.tab-btn {
  background: transparent;
  border: 2px solid rgba(255,70,70,0.4);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.25s;
}
.tab-btn.active {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  color: var(--btn-text);
}

/* Card */
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.6), 0 0 40px var(--card-glow);
  backdrop-filter: blur(6px);
  padding: 20px;
  transition: background .4s ease, transform .3s ease;
}
.inner-form { display: flex; flex-direction: column; gap: 12px; text-align: left; }
.field { display: flex; flex-direction: column; gap: 6px; }
.label-text { font-weight: 600; color: var(--text-muted); font-size: 0.86rem; }
select, input[type="password"], input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: rgba(0,0,0,0.45);
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
}
.btn {
  margin-top: 6px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  color: var(--btn-text);
  padding: 10px;
  border-radius: 10px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform .14s ease, filter .14s;
}
.btn:hover { transform: translateY(-2px); filter: brightness(.98); }
.msg { min-height: 20px; color: var(--text-main); font-size: 0.95rem; }
.credit { margin-top: 10px; color: var(--text-main); font-size: 0.85rem; }
.hiddenn {display:none;}

/* Loading Overlay */
 .loading {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--loading-bg);
  z-index: 9999;
}
.loading-box {
  padding: 18px 28px;
  border-radius: 12px;
  border: 2px solid rgba(255,70,70,0.12);
  text-align: center;
}
.loading-text { color: var(--loading-text); font-weight: 800; font-size: 2rem; } 

/* Autocomplete */
.autocomplete-popup {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: white;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  border-radius: 8px;
  z-index: 10;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.autocomplete-popup.show {
  opacity: 1;
  transform: translateY(0);
}
.suggestions div {
  padding: 10px;
  border-bottom: 1px solid #eee;
  color: #000;
  cursor: pointer;
}
.suggestions div:hover { background-color: #f1f1f1; }