:root {
  /* theme foundation */
  --bg-main: #05060a;
  --bg-top: #171a26;
  --bg-mid: #0a0c13;

  --text: #f4f6ff;
  --text-soft: #dce2ff;
  --text-label: #e4e7f4;
  --muted: #aab0c5;
  --muted-2: #cfd5ea;
  --placeholder: #8f97b0;

  --card: rgba(15, 18, 30, 0.72);
  --card-strong: rgba(17, 20, 32, 0.82);
  --card-strong-2: rgba(10, 12, 20, 0.78);

  --surface: rgba(255, 255, 255, 0.04);
  --surface-soft: rgba(255, 255, 255, 0.03);
  --surface-soft-2: rgba(255, 255, 255, 0.05);
  --surface-hover: rgba(255, 255, 255, 0.06);

  --border: rgba(255, 255, 255, 0.08);
  --border-soft: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.10);
  --border-dashed: rgba(255, 255, 255, 0.14);

  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.08);
  --input-focus-border: rgba(142, 166, 255, 0.34);
  --input-focus-ring: rgba(142, 166, 255, 0.08);

  --accent-1: #8ea6ff;
  --accent-2: #9c7cff;
  --accent-3: #6ed0ff;
  --accent-1-rgb: 142, 166, 255;
  --accent-2-rgb: 156, 124, 255;
  --accent-3-rgb: 110, 208, 255;

  --grad-accent: linear-gradient(
    135deg,
    rgba(var(--accent-1-rgb), 0.20),
    rgba(var(--accent-2-rgb), 0.20)
  );
  --grad-accent-soft: linear-gradient(
    135deg,
    rgba(var(--accent-1-rgb), 0.14),
    rgba(var(--accent-2-rgb), 0.14)
  );
  --grad-logo: linear-gradient(
    135deg,
    rgba(var(--accent-1-rgb), 0.20),
    rgba(var(--accent-2-rgb), 0.18)
  );
  --grad-card: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.03)
  );
  --grad-bubble: linear-gradient(
    180deg,
    rgba(18, 22, 36, 0.96),
    rgba(12, 14, 24, 0.96)
  );

  --orb-1: rgba(var(--accent-1-rgb), 0.28);
  --orb-2: rgba(var(--accent-2-rgb), 0.18);
  --orb-3: rgba(var(--accent-3-rgb), 0.14);

  --success-bg: rgba(90, 255, 180, 0.08);
  --success-border: rgba(90, 255, 180, 0.18);
  --success-text: #d6ffee;

  --error-bg: rgba(255, 90, 120, 0.08);
  --error-border: rgba(255, 90, 120, 0.20);
  --error-text: #ffd5df;

  --shadow-lg:
    0 30px 80px rgba(0, 0, 0, 0.48),
    0 0 40px rgba(128, 120, 255, 0.08);

  --shadow-accent-sm: 0 0 20px rgba(var(--accent-1-rgb), 0.08);
  --shadow-accent-md:
    0 0 18px rgba(var(--accent-1-rgb), 0.10),
    0 0 28px rgba(var(--accent-2-rgb), 0.08);
  --shadow-accent-lg:
    0 16px 34px rgba(0, 0, 0, 0.26),
    0 0 22px rgba(var(--accent-1-rgb), 0.12);
  --shadow-accent-lg-hover:
    0 20px 40px rgba(0, 0, 0, 0.30),
    0 0 28px rgba(var(--accent-1-rgb), 0.14);
}

/* optional future theme */
body.theme-lara {
  --bg-main: #090812;
  --bg-top: #17162a;
  --bg-mid: #11101f;

  --text: #f8f7ff;
  --text-soft: #e5dcff;
  --text-label: #f0ebff;
  --muted: #b8afd6;
  --muted-2: #d8cff7;
  --placeholder: #9f97bb;

  --card: rgba(22, 18, 38, 0.74);
  --card-strong: rgba(26, 21, 45, 0.84);
  --card-strong-2: rgba(17, 14, 31, 0.80);

  --surface: rgba(255, 255, 255, 0.05);
  --surface-soft: rgba(255, 255, 255, 0.035);
  --surface-soft-2: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.075);

  --border: rgba(214, 199, 255, 0.12);
  --border-soft: rgba(214, 199, 255, 0.08);
  --border-strong: rgba(214, 199, 255, 0.18);
  --border-dashed: rgba(214, 199, 255, 0.16);

  --input-bg: rgba(255, 255, 255, 0.045);
  --input-border: rgba(214, 199, 255, 0.12);
  --input-focus-border: rgba(177, 140, 255, 0.40);
  --input-focus-ring: rgba(177, 140, 255, 0.10);

  --accent-1: #a8b8ff;
  --accent-2: #b18cff;
  --accent-3: #95e2ff;
  --accent-1-rgb: 168, 184, 255;
  --accent-2-rgb: 177, 140, 255;
  --accent-3-rgb: 149, 226, 255;

  --orb-1: rgba(var(--accent-1-rgb), 0.28);
  --orb-2: rgba(var(--accent-2-rgb), 0.18);
  --orb-3: rgba(var(--accent-3-rgb), 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(
    circle at top,
    var(--bg-top) 0%,
    var(--bg-mid) 36%,
    var(--bg-main) 100%
  );
  overflow-x: hidden;
  position: relative;
}

.hidden {
  display: none !important;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.42;
}

.orb-1 {
  width: 300px;
  height: 300px;
  top: -80px;
  left: -60px;
  background: var(--orb-1);
}

.orb-2 {
  width: 360px;
  height: 360px;
  right: -80px;
  top: 18%;
  background: var(--orb-2);
}

.orb-3 {
  width: 260px;
  height: 260px;
  bottom: -60px;
  left: 42%;
  background: var(--orb-3);
}

.noise {
  position: fixed;
  inset: 0;
  opacity: 0.03;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

.auth-page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  padding: 40px 0;
}

.brand-side {
  padding: 20px 12px 20px 8px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  box-shadow: var(--shadow-accent-sm);
  margin-bottom: 22px;
}

.brand-title {
  font-size: clamp(2.3rem, 5vw, 4rem);
  line-height: 1.02;
  margin: 0 0 16px;
  max-width: 620px;
  letter-spacing: -0.03em;
  text-shadow:
    0 0 12px rgba(var(--accent-1-rgb), 0.18),
    0 0 24px rgba(var(--accent-2-rgb), 0.10);
}

.brand-text {
  margin: 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.75;
  max-width: 560px;
}

.brand-preview {
  margin-top: 34px;
  display: flex;
  align-items: flex-end;
  gap: 18px;
  flex-wrap: wrap;
}

.preview-card {
  width: 230px;
  border-radius: 26px;
  padding: 18px;
  background: var(--grad-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.preview-card.small {
  width: 180px;
  opacity: 0.88;
}

.preview-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--muted-2);
  border: 1px solid var(--border);
  background: var(--surface-soft);
}

.preview-pill.active {
  color: var(--text);
  border-color: rgba(var(--accent-1-rgb), 0.35);
  box-shadow: var(--shadow-accent-md);
}

.preview-lines {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.preview-lines span {
  display: block;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.12),
    rgba(255, 255, 255, 0.04)
  );
}

.preview-lines span:nth-child(1) {
  width: 90%;
}

.preview-lines span:nth-child(2) {
  width: 70%;
}

.preview-lines span:nth-child(3) {
  width: 82%;
}

.preview-lines span:nth-child(4) {
  width: 58%;
}

.auth-shell {
  display: flex;
  justify-content: center;
}

.auth-card {
  width: min(460px, 100%);
  border-radius: 32px;
  padding: 28px;
  background: linear-gradient(
    180deg,
    var(--card-strong),
    var(--card-strong-2)
  );
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.auth-top {
  text-align: center;
  margin-bottom: 22px;
}

.auth-logo {
  width: 58px;
  height: 58px;
  margin: 0 auto 16px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  background: var(--grad-logo);
  border: 1px solid var(--border-strong);
  box-shadow:
    inset 0 1px 0 var(--border),
    0 0 24px rgba(var(--accent-1-rgb), 0.10);
}

.auth-top h2 {
  margin: 0 0 8px;
  font-size: 1.9rem;
  letter-spacing: -0.02em;
}

.auth-top p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 18px;
  padding: 6px;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--border-soft);
}

.mode-btn {
  height: 44px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted-2);
  cursor: pointer;
  font-size: 0.96rem;
  transition: 0.22s ease;
}

.mode-btn.active {
  color: var(--text);
  background: linear-gradient(
    135deg,
    rgba(var(--accent-1-rgb), 0.18),
    rgba(var(--accent-2-rgb), 0.18)
  );
  box-shadow:
    0 0 18px rgba(var(--accent-1-rgb), 0.10),
    inset 0 1px 0 var(--border);
}

.auth-panel {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.92rem;
  color: var(--text-label);
}

.field small {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.field input {
  width: 100%;
  height: 54px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  outline: none;
  font-size: 0.96rem;
  transition: 0.2s ease;
}

.field input::placeholder {
  color: var(--placeholder);
}

.field input:focus {
  border-color: var(--input-focus-border);
  box-shadow:
    0 0 0 4px var(--input-focus-ring),
    0 0 18px rgba(var(--accent-2-rgb), 0.08);
}

.captcha-placeholder {
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  border: 1px dashed var(--border-dashed);
  background: var(--surface-soft);
  color: #9ca4bc;
  font-size: 0.92rem;
}

.primary-btn,
.ghost-btn {
  height: 54px;
  border-radius: 16px;
  font-size: 0.97rem;
  cursor: pointer;
  transition: 0.22s ease;
}

.primary-btn {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--grad-accent);
  box-shadow: var(--shadow-accent-lg);
}

.primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent-lg-hover);
}

.ghost-btn {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: #d7dced;
}

.ghost-btn:hover {
  border-color: rgba(var(--accent-1-rgb), 0.22);
}

.verify-icon {
  width: 62px;
  height: 62px;
  margin: 0 auto 8px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
}

.verify-text {
  text-align: center;
  margin: 0 0 4px;
  color: var(--muted);
  line-height: 1.7;
}

.message-box {
  margin-bottom: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.6;
  border: 1px solid var(--border);
}

.message-box.error {
  background: var(--error-bg);
  color: var(--error-text);
  border-color: var(--error-border);
}

.message-box.success {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.password-field {
  position: relative;
}

.password-wrap {
  position: relative;
}

.password-wrap input {
  padding-right: 54px;
}

.eye-toggle {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 999px;
  background: transparent;
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  transition: 0.2s ease;
  z-index: 3;
}

.eye-toggle:hover {
  background: var(--surface-hover);
}

.eye-toggle svg {
  width: 20px;
  height: 20px;
  fill: var(--accent-1);
  opacity: 0.9;
  transition: 0.2s ease;
}

.eye-toggle:hover svg {
  fill: #b3c2ff;
  opacity: 1;
}

.hidden-eye {
  display: none;
}

.password-bubble {
  position: absolute;
  top: 50%;
  left: calc(100% + 14px);
  transform: translateY(-50%) translateX(8px);
  width: 230px;
  padding: 14px 15px;
  border-radius: 18px;
  background: var(--grad-bubble);
  border: 1px solid var(--border);
  box-shadow:
    0 16px 40px rgba(0, 0, 0, 0.35),
    0 0 22px rgba(var(--accent-1-rgb), 0.10);
  color: #d8dff5;
  opacity: 0;
  pointer-events: none;
  transition: 0.2s ease;
  z-index: 5;
}

.password-bubble::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -8px;
  transform: translateY(-50%) rotate(45deg);
  width: 14px;
  height: 14px;
  background: rgba(15, 18, 30, 0.96);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.password-bubble .bubble-title {
  font-size: 0.87rem;
  font-weight: 700;
  color: #f0f4ff;
  margin-bottom: 8px;
}

.password-bubble ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.password-bubble li {
  font-size: 0.8rem;
  color: #aeb7d2;
  line-height: 1.45;
}

.password-wrap:hover .password-bubble,
.password-wrap:focus-within .password-bubble {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.field:focus-within .password-tip {
  display: block;
}

.strength-bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: var(--surface-soft-2);
  overflow: hidden;
  margin-top: 8px;
}

#strength-fill {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 999px;
  transition: width 0.2s ease;
  background: linear-gradient(90deg, #ff7a9f, #ffd36e, #78ffbc);
}

#strength-text {
  display: block;
  margin-top: 8px;
  color: #9fa8c2;
}

.captcha-wrap {
  margin-top: 4px;
}

.login-identifier-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 54px;
}

.login-mode-input {
  height: 54px;
  padding: 0 16px;
  border-radius: 18px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  outline: none;
  font-size: 0.96rem;
  transition: 0.28s ease;
}

.login-mode-input::placeholder {
  color: var(--placeholder);
}

.login-mode-input:focus {
  border-color: var(--input-focus-border);
  box-shadow:
    0 0 0 4px var(--input-focus-ring),
    0 0 18px rgba(var(--accent-2-rgb), 0.08);
}

.email-input {
  flex: 1;
  min-width: 0;
}

.username-login-group {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.username-input {
  flex: 1 1 auto;
  min-width: 0;
}

.tag-input {
  width: 82px;
  min-width: 82px;
  text-align: center;
  flex: 0 0 82px;
}

.login-mode-toggle {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--grad-accent-soft);
  color: var(--text-soft);
  font-size: 1.1rem;
  cursor: pointer;
  transition: 0.25s ease;
  box-shadow:
    0 0 16px rgba(var(--accent-1-rgb), 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.login-mode-toggle:hover {
  transform: translateY(-1px) scale(1.03);
  box-shadow:
    0 0 20px rgba(var(--accent-1-rgb), 0.14),
    0 0 30px rgba(var(--accent-2-rgb), 0.10);
}

.login-mode-toggle.active {
  color: var(--text);
  border-color: rgba(var(--accent-1-rgb), 0.24);
  box-shadow:
    0 0 22px rgba(var(--accent-1-rgb), 0.16),
    0 0 34px rgba(var(--accent-2-rgb), 0.12);
}

.email-heart.hidden {
  display: none !important;
}

.login-heart-bubble {
  position: absolute;
  top: 50%;
  left: calc(100% + 12px);
  transform: translateY(-50%) translateX(8px);
  width: 170px;
  padding: 11px 13px;
  border-radius: 16px;
  background: var(--grad-bubble);
  border: 1px solid var(--border);
  box-shadow:
    0 16px 40px rgba(0, 0, 0, 0.35),
    0 0 20px rgba(var(--accent-1-rgb), 0.08);
  color: var(--muted-2);
  font-size: 0.82rem;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  transition: 0.2s ease;
  z-index: 5;
}

.login-heart-bubble::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -7px;
  transform: translateY(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: rgba(15, 18, 30, 0.96);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.login-identifier-wrap:hover .login-heart-bubble,
.login-identifier-wrap:focus-within .login-heart-bubble {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.remember-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  margin-bottom: 8px;
  cursor: pointer;
  user-select: none;
}

.remember-wrap input {
  display: none;
}

.remember-custom {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--surface);
  position: relative;
  transition: 0.2s ease;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.remember-wrap input:checked + .remember-custom {
  background: linear-gradient(
    135deg,
    rgba(var(--accent-1-rgb), 0.35),
    rgba(var(--accent-2-rgb), 0.35)
  );
  border-color: rgba(var(--accent-1-rgb), 0.4);
  box-shadow:
    0 0 10px rgba(var(--accent-1-rgb), 0.25),
    0 0 20px rgba(var(--accent-2-rgb), 0.18);
}

.remember-custom::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%) rotate(45deg);
  opacity: 0;
  transition: 0.2s ease;
}

.remember-wrap input:checked + .remember-custom::after {
  opacity: 1;
}

.remember-text {
  font-size: 0.9rem;
  color: var(--muted-2);
}

@media (max-width: 960px) {
  .auth-page {
    grid-template-columns: 1fr;
    gap: 22px;
    width: min(100%, calc(100% - 20px));
    padding: 20px 0 28px;
  }

  .brand-side {
    padding: 10px 4px 0;
  }

  .brand-title,
  .brand-text {
    max-width: 100%;
  }

  .auth-card {
    padding: 22px;
  }
}

@media (max-width: 900px) {
  .password-bubble {
    top: calc(100% + 10px);
    left: 0;
    transform: translateY(8px);
    width: 100%;
  }

  .password-bubble::before {
    top: -7px;
    left: 24px;
    transform: rotate(45deg);
    border-left: 1px solid var(--border);
    border-bottom: none;
    border-top: 1px solid var(--border);
  }

  .password-wrap:hover .password-bubble,
  .password-wrap:focus-within .password-bubble {
    transform: translateY(0);
  }
}

@media (max-width: 680px) {
  .login-heart-bubble {
    top: calc(100% + 10px);
    left: auto;
    right: 0;
    transform: translateY(8px);
  }

  .login-heart-bubble::before {
    top: -7px;
    left: auto;
    right: 18px;
    transform: rotate(45deg);
    border-left: 1px solid var(--border);
    border-bottom: none;
    border-top: 1px solid var(--border);
  }

  .login-identifier-wrap:hover .login-heart-bubble,
  .login-identifier-wrap:focus-within .login-heart-bubble {
    transform: translateY(0);
  }
}

@media (max-width: 560px) {
  .brand-title {
    font-size: 2.1rem;
  }

  .auth-top h2 {
    font-size: 1.55rem;
  }

  .auth-card {
    border-radius: 26px;
  }

  .field input,
  .primary-btn,
  .ghost-btn,
  .captcha-placeholder,
  .login-mode-input {
    height: 50px;
  }

  .login-mode-toggle {
    width: 46px;
    height: 46px;
    min-width: 46px;
  }
}