:root {
  --bg-1: #ffffff;
  --bg-2: #f8fafc;
  --bg-3: #f1f5f9;

  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --card-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);

  --text-main: #0f172a;
  --text-muted: #64748b;

  --accent: #7c3aed;
  --accent-2: #0ea5e9;
  --accent-soft: rgba(124, 58, 237, 0.08);

  --danger: #e11d48;
  --success: #16a34a;
  --warning: #f59e0b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
  color: var(--text-main);
  background: var(--bg-2);
  background-size: 300% 300%;
  animation: gradientShift 16s ease infinite;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(460px, 100%);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  padding: 28px;
  animation: cardEnter 0.75s ease both;
}

.login-logo {
  width: 200px;
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 10px;
}

h1 { margin: 0; font-size: 1.8rem; letter-spacing: 0.3px; text-align: center; }
.subtitle { margin: 6px 0 24px; color: var(--text-muted); text-align: center; }

.field { margin-bottom: 16px; }
label { display: inline-block; margin-bottom: 7px; color: var(--text-muted); font-size: 0.95rem; }

input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 1rem;
}

input:focus {
  outline: none;
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.22);
}

.password-wrap { position: relative; }
.password-wrap input { padding-right: 72px; }

.ghost-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  border-radius: 8px;
  padding: 7px 10px;
  cursor: pointer;
}

.remember-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0 18px;
  cursor: pointer;
}

.remember-row input { width: auto; }

.error {
  min-height: 22px;
  margin: 0 0 6px;
  color: #fecdd3;
  font-size: 0.92rem;
}

.primary-btn {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 12px;
  font-size: 1rem;
  color: white;
  background: linear-gradient(130deg, var(--accent-2), var(--accent));
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 0.2s ease;
}

.primary-btn:hover { transform: translateY(-2px); }
.primary-btn:disabled { opacity: 0.7; cursor: wait; }

.spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading .spinner { display: inline-block; }
.loading .btn-label { opacity: 0.8; }

.shake { animation: shake 0.35s linear; }

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes cardEnter {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-4px); }
}