:root {
  --bg-top: #020612;
  --bg-mid: #030816;
  --bg-bottom: #02040c;
  --halo-a: rgba(38, 61, 168, 0.10);
  --halo-b: rgba(74, 76, 170, 0.08);
  --card-bg: rgba(4, 17, 56, 0.94);
  --card-border: rgba(92, 107, 235, 0.34);
  --line: rgba(113, 127, 255, 0.20);
  --text: #eef1ff;
  --muted: rgba(221, 227, 255, 0.78);
  --soft: rgba(210, 218, 255, 0.55);
  --input-bg: rgba(1, 9, 31, 0.86);
  --input-border: rgba(82, 97, 226, 0.28);
  --button: linear-gradient(90deg, #5f6ee1 0%, #5362d7 100%);
  --button-hover: linear-gradient(90deg, #6978f0 0%, #5b68e2 100%);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Inter, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 42%, var(--bg-bottom) 100%);
  color: var(--text);
}

.page-shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
  overflow: hidden;
}

.ambient {
  position: absolute;
  inset: auto;
  border-radius: 999px;
  filter: blur(70px);
  pointer-events: none;
}

.ambient-a {
  width: 420px;
  height: 420px;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--halo-a);
}

.ambient-b {
  width: 300px;
  height: 300px;
  bottom: -90px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--halo-b);
}

.login-shell {
  position: relative;
  z-index: 1;
  width: min(460px, calc(100vw - 40px));
}

.hero-block {
  text-align: center;
  margin-bottom: 28px;
}

.hero-block h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  line-height: 1;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #8f9cff;
}

.hero-block p {
  margin: 14px 0 0;
  font-size: clamp(0.95rem, 1.7vw, 1.1rem);
  color: var(--soft);
}

.login-card {
  border-radius: 18px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.42);
  padding: 28px 30px 26px;
  backdrop-filter: blur(8px);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field-block label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.input-wrap {
  position: relative;
}

.input-wrap input {
  width: 100%;
  height: 52px;
  border-radius: 10px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  padding: 0 46px 0 48px;
  font-size: 1rem;
  outline: none;
}

.input-wrap input::placeholder {
  color: rgba(221, 227, 255, 0.28);
}

.input-wrap input:focus {
  border-color: rgba(128, 143, 255, 0.70);
  box-shadow: 0 0 0 3px rgba(92, 103, 226, 0.14);
}

.input-icon,
.toggle-password {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.input-icon {
  left: 16px;
  font-size: 1.2rem;
  color: #7382ee;
}

.toggle-password {
  right: 14px;
  border: 0;
  background: transparent;
  color: #7382ee;
  cursor: pointer;
  font-size: 1rem;
}

.submit-btn {
  margin-top: 4px;
  height: 50px;
  border: 0;
  border-radius: 10px;
  background: var(--button);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.submit-btn:hover {
  background: var(--button-hover);
  transform: translateY(-1px);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: wait;
  transform: none;
}

.forgot-link {
  margin-top: 2px;
  text-align: center;
  color: #7f8cf3;
  font-size: 0.95rem;
}

.login-error {
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(182, 66, 90, 0.18);
  border: 1px solid rgba(220, 102, 122, 0.35);
  color: #ffdfe5;
  font-size: 0.95rem;
}

.hidden { display: none; }

@media (max-width: 560px) {
  .page-shell { padding: 24px 14px; }
  .login-shell { width: min(100%, 390px); }
  .hero-block { margin-bottom: 22px; }
  .hero-block p { line-height: 1.4; }
  .login-card { padding: 22px 18px 20px; border-radius: 16px; }
  .input-wrap input { height: 48px; font-size: 0.96rem; }
  .submit-btn { height: 48px; }
}


/* Core V1.1 logo */
.login-logo-card {
  width: min(300px, 82vw);
  min-height: 104px;
  margin: 0 auto;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.78);
  display: grid;
  place-items: center;
  padding: 16px 20px;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.28);
}

.login-logo {
  width: 100%;
  max-height: 82px;
  object-fit: contain;
  display: block;
}

.login-logo-fallback {
  display: none;
}

.login-logo-card.logo-fallback .login-logo-fallback {
  display: block;
  color: #15336d;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0.06em;
}

/* Core V1.2 reset password */
.reset-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text);
}

.reset-help {
  margin: -8px 0 0;
  color: var(--soft);
  font-size: 0.92rem;
  line-height: 1.45;
}

.login-info {
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(82, 97, 226, 0.14);
  border: 1px solid rgba(128, 143, 255, 0.28);
  color: #e6ebff;
  font-size: 0.95rem;
  line-height: 1.4;
}

.login-info.ok {
  background: rgba(52, 157, 111, 0.16);
  border-color: rgba(89, 211, 154, 0.34);
  color: #d9ffef;
}

.login-info.err {
  background: rgba(182, 66, 90, 0.18);
  border-color: rgba(220, 102, 122, 0.35);
  color: #ffdfe5;
}

.back-link {
  border: 0;
  background: transparent;
  color: #7f8cf3;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: underline;
}