/* ── Reset & Tokens ───────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* palette */
  --bg:        #0a0a0f;
  --surface:   rgba(18, 18, 28, 0.72);
  --border:    rgba(255, 255, 255, 0.06);
  --border-hl: rgba(32, 178, 170, 0.45);
  --text:      #e8eaf0;
  --text-dim:  #8a8fa8;
  --accent:    #20b2aa;
  --accent-2:  #5b9bd5;
  --accent-glow: rgba(32, 178, 170, 0.18);
  --danger:    #f0506e;

  /* typography */
  --ff: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--ff);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

/* ── Animated Background ─────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
  background-size: 64px 64px;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  z-index: 0;
  animation: float 14s ease-in-out infinite alternate;
}

.bg-glow--1 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, #20b2aa 0%, transparent 70%);
  top: -12%;
  left: -8%;
  animation-delay: 0s;
}

.bg-glow--2 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, #5b9bd5 0%, transparent 70%);
  bottom: -10%;
  right: -6%;
  animation-delay: -5s;
}

.bg-glow--3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #7c5bcc 0%, transparent 70%);
  top: 50%;
  left: 55%;
  transform: translate(-50%, -50%);
  animation-delay: -9s;
  opacity: 0.22;
}

@keyframes float {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(30px, -20px) scale(1.08); }
  100% { transform: translate(-20px, 25px) scale(0.95); }
}

/* ── Container ───────────────────────────────────── */
.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  padding: 24px;
}

/* ── Card ────────────────────────────────────────── */
.card {
  background: var(--surface);
  backdrop-filter: blur(40px) saturate(1.4);
  -webkit-backdrop-filter: blur(40px) saturate(1.4);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 44px 36px 36px;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 24px 64px -12px rgba(0, 0, 0, 0.55);
  animation: cardIn 0.7s var(--ease-out) both;
  transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.card.hidden {
  display: none;
}

.card.fade-out {
  opacity: 0;
  transform: scale(0.97) translateY(8px);
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(28px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ── Logo ────────────────────────────────────────── */
.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { filter: drop-shadow(0 0 6px rgba(32,178,170,0.3)); }
  50%      { filter: drop-shadow(0 0 14px rgba(32,178,170,0.55)); }
}

.logo-text {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text) 40%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Subtitle ────────────────────────────────────── */
.subtitle {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.55;
  margin-bottom: 30px;
}

/* ── Input ───────────────────────────────────────── */
.input-group {
  margin-bottom: 18px;
}

.input-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  color: var(--text-dim);
  pointer-events: none;
  transition: color 0.25s;
}

.input-wrapper input {
  width: 100%;
  padding: 13px 16px 13px 42px;
  font-family: var(--ff);
  font-size: 0.94rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}

.input-wrapper input::placeholder {
  color: rgba(255,255,255,0.2);
}

.input-wrapper input:focus {
  border-color: var(--border-hl);
  background: rgba(255,255,255,0.06);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-wrapper input:focus ~ .input-icon,
.input-wrapper:has(input:focus) .input-icon {
  color: var(--accent);
}

.input-group.error .input-wrapper input {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(240,80,110,0.12);
}

.input-error {
  display: block;
  font-size: 0.78rem;
  color: var(--danger);
  margin-top: 6px;
  min-height: 18px;
  transition: opacity 0.2s;
}

/* ── Primary Button ──────────────────────────────── */
.btn-primary {
  position: relative;
  width: 100%;
  padding: 14px 20px;
  font-family: var(--ff);
  font-size: 0.94rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  overflow: hidden;
  transition: transform 0.2s var(--ease-spring), box-shadow 0.3s;
  box-shadow:
    0 2px 12px rgba(32,178,170,0.25),
    0 0 0 1px rgba(255,255,255,0.06) inset;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 6px 24px rgba(32,178,170,0.35),
    0 0 0 1px rgba(255,255,255,0.1) inset;
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:active {
  transform: translateY(0) scale(0.985);
}

.btn-arrow {
  width: 18px;
  height: 18px;
  transition: transform 0.25s var(--ease-out);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(3px);
}

/* Loading state */
.btn-loader {
  display: none;
}

.btn-primary.loading .btn-text,
.btn-primary.loading .btn-arrow {
  visibility: hidden;
}

.btn-primary.loading .btn-loader {
  display: flex;
  position: absolute;
}

.spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid rgba(255,255,255,0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}

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

/* ── Divider ─────────────────────────────────────── */
.divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 26px 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.divider span {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ── Social Buttons ──────────────────────────────── */
.social-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  font-family: var(--ff);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, transform 0.2s var(--ease-spring);
}

.btn-social:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-1px);
}

.btn-social:active {
  transform: translateY(0) scale(0.98);
}

.social-icon {
  width: 20px;
  height: 20px;
}

/* ── Footer ──────────────────────────────────────── */
.footer-text {
  margin-top: 28px;
  font-size: 0.74rem;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.65;
}

.footer-text a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-text a:hover {
  color: var(--accent-2);
  text-decoration: underline;
}

/* ── Success Card ────────────────────────────────── */
.card--success {
  text-align: center;
}

.success-icon-wrapper {
  position: relative;
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
}

.success-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2.5px solid var(--accent);
  animation: ringIn 0.6s var(--ease-out) both;
  box-shadow: 0 0 20px var(--accent-glow);
}

@keyframes ringIn {
  from { transform: scale(0.5); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.success-mail-icon {
  position: absolute;
  inset: 14px;
  color: var(--accent);
  animation: mailBounce 0.6s 0.3s var(--ease-spring) both;
}

@keyframes mailBounce {
  from { transform: scale(0.3) translateY(6px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}

.success-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.success-email {
  font-size: 0.92rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 8px;
  word-break: break-all;
}

.success-desc {
  font-size: 0.86rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 24px;
}

/* ── OTP Input Boxes ─────────────────────────────── */
.otp-section {
  text-align: left;
  margin-bottom: 8px;
}

.otp-inputs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
  margin-bottom: 4px;
}

.otp-box {
  width: 48px;
  height: 56px;
  text-align: center;
  font-family: var(--ff);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  outline: none;
  caret-color: var(--accent);
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s, transform 0.15s var(--ease-spring);
}

.otp-box:focus {
  border-color: var(--border-hl);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 3px var(--accent-glow);
  transform: translateY(-2px);
}

.otp-box.filled {
  border-color: var(--accent);
  background: rgba(32, 178, 170, 0.06);
}

.otp-box.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(240,80,110,0.12);
  animation: shake 0.4s ease;
}

.otp-box.success {
  border-color: #34d399;
  background: rgba(52, 211, 153, 0.06);
}

.otp-dash {
  font-size: 1.2rem;
  color: var(--text-dim);
  user-select: none;
  margin: 0 2px;
}

.otp-error {
  display: block;
  font-size: 0.78rem;
  color: var(--danger);
  margin-top: 6px;
  min-height: 18px;
  text-align: center;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

/* ── Token Input (full token paste) ──────────────── */
.token-toggle {
  text-align: center;
  margin: 12px 0 6px;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--ff);
  font-size: 0.78rem;
  cursor: pointer;
  transition: color 0.2s;
  padding: 4px 0;
}

.link-btn:hover {
  color: var(--accent);
}

.token-input-wrapper {
  margin: 8px 0 4px;
  animation: slideDown 0.3s var(--ease-out);
}

.token-input-wrapper.hidden {
  display: none;
}

.token-input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--ff);
  font-size: 0.82rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.token-input::placeholder {
  color: rgba(255,255,255,0.2);
}

.token-input:focus {
  border-color: var(--border-hl);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Verify Button ───────────────────────────────── */
.btn-verify {
  margin-top: 16px;
}

.btn-verify .btn-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Verification Results ────────────────────────── */
.verify-result {
  padding: 10px 0;
  animation: resultIn 0.5s var(--ease-out) both;
}

.verify-result.hidden {
  display: none;
}

@keyframes resultIn {
  from { opacity: 0; transform: scale(0.9) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.result-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  animation: iconPop 0.4s 0.1s var(--ease-spring) both;
}

@keyframes iconPop {
  from { transform: scale(0.4); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.result-icon--success {
  color: #34d399;
  filter: drop-shadow(0 0 12px rgba(52,211,153,0.3));
}

.result-icon--error {
  color: var(--danger);
  filter: drop-shadow(0 0 12px rgba(240,80,110,0.3));
}

.result-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.result-title--success { color: #34d399; }
.result-title--error   { color: var(--danger); }

.result-desc {
  font-size: 0.86rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 18px;
}

/* ── Success Footer ──────────────────────────────── */
.success-footer {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.success-footer-row {
  display: flex;
  justify-content: center;
  gap: 10px;
}

/* ── Secondary Button ────────────────────────────── */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  font-family: var(--ff);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: color 0.25s, background 0.25s, border-color 0.25s, transform 0.2s var(--ease-spring);
}

.btn-secondary:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 480px) {
  .card {
    padding: 32px 22px 28px;
    border-radius: 20px;
  }

  .container {
    padding: 16px;
  }

  .logo-text {
    font-size: 1.3rem;
  }

  .social-buttons {
    grid-template-columns: 1fr;
  }

  .otp-box {
    width: 40px;
    height: 48px;
    font-size: 1.2rem;
  }

  .otp-inputs {
    gap: 5px;
  }

  .success-footer-row {
    flex-direction: column;
    align-items: center;
  }
}

/* ── Accessibility ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}