* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Inter", sans-serif;
}

:root {
  --brand: #039fc8;
  --brand-strong: #028bb0;
  --accent: #71b247;
  --text: #0a0a0a;
  --muted: rgba(10, 10, 10, 0.7);
  --border: rgba(137, 137, 137, 0.65);
  --surface: #ffffff;
}

body {
  background: radial-gradient(circle at 20% 10%, #eef6ff 0%, #ffffff 45%, #f8fbff 100%);
  color: var(--text);
  overflow-x: hidden;
}

/* ====== HEADER ====== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 5%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.logo img {
  width: 130px;
  height: auto;
}

.menu {
  display: flex;
  gap: 2rem;
}

.menu a {
  color: #000;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}

.menu a:hover {
  color: var(--accent);
}

.buttons {
  display: flex;
  gap: 0.8rem;
}

.btn {
  border-radius: 30px;
  padding: 8px 20px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.signup {
  background: var(--accent);
  color: #fff;
  border: none;
}

.signin {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
}

/* ====== SIGN IN BOX ====== */
.signin-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 3.5rem 1rem 4rem;
  position: relative;
  overflow: hidden;
}

.signin-container::before,
.signin-container::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(3, 159, 200, 0.2), transparent 60%);
  pointer-events: none;
}

.signin-container::before {
  top: -160px;
  left: -120px;
}

.signin-container::after {
  bottom: -200px;
  right: -140px;
}

.signin-box {
  background: var(--surface);
  max-width: 480px;
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.08);
  padding: 2.4rem 2.2rem;
  text-align: center;
  position: relative;
  z-index: 1;
  animation: riseIn 0.35s ease;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.confetti {
  width: 90px;
  margin-bottom: 1rem;
  filter: drop-shadow(0 8px 16px rgba(3, 159, 200, 0.2));
  animation: floatIn 2.2s ease-in-out infinite;
}

.title {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.45;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

/* ====== FORM ====== */
.input-field {
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 1rem;
  border: 1px solid rgba(148, 163, 184, 0.6);
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.input-field:focus {
  border-color: rgba(3, 159, 200, 0.8);
  box-shadow: 0 0 0 3px rgba(3, 159, 200, 0.18);
  outline: none;
  transform: translateY(-1px);
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
  font-size: 14px;
  color: rgba(10, 10, 10, 0.7);
}

.form-options label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.form-options input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--brand);
}

.form-options .forgot {
  color: #DC143C;
  text-decoration: none;
  font-weight: 700;
}

.form-messages {
  margin: 0.6rem 0 1rem;
}

.alert-success {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(16, 185, 129, 0.35);
  background: rgba(16, 185, 129, 0.12);
  color: #065f46;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 8px 18px rgba(15, 81, 50, 0.06);
}

.alert-info {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(59, 130, 246, 0.25);
  background: rgba(59, 130, 246, 0.08);
  color: #1e3a8a;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 8px 18px rgba(30, 58, 138, 0.06);
}

.otp-inputs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 1rem 0 0.6rem;
}

.otp-digit {
  width: 48px;
  height: 54px;
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  border: 1px solid rgba(148, 163, 184, 0.6);
  border-radius: 12px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.otp-digit:focus {
  border-color: rgba(3, 159, 200, 0.9);
  box-shadow: 0 0 0 3px rgba(3, 159, 200, 0.18);
  outline: none;
  transform: translateY(-1px);
}

.resend-form {
  margin-top: 0.4rem;
}

.resend-btn {
  background: transparent;
  border: none;
  color: var(--brand);
  font-weight: 700;
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
}

.resend-btn[disabled] {
  color: rgba(10, 10, 10, 0.35);
  cursor: not-allowed;
}

.btn-login {
  display: block;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #08b3dd 0%, #039fc8 55%, #038bb1 100%);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
  box-shadow: 0 12px 28px rgba(3, 159, 200, 0.22);
  position: relative;
}

.btn-login:hover {
  filter: brightness(1.02);
  transform: translateY(-1px);
}

.btn-login:active {
  transform: translateY(0);
}

.btn-login:disabled {
  background: linear-gradient(135deg, #b7c6cc 0%, #a2b4bc 100%);
  cursor: not-allowed;
  box-shadow: none;
  filter: none;
}

.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-top-color: #fff;
  border-radius: 50%;
  display: inline-block;
  margin-left: 8px;
  animation: spin 0.9s linear infinite;
}

.otp-has-error {
  animation: shake 0.3s ease;
}

.otp-success .otp-digit {
  border-color: rgba(16, 185, 129, 0.7);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.12);
}

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

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

.reset-box {
  max-width: 480px;
}

.field-label {
  display: block;
  text-align: left;
  font-size: 14px;
  font-weight: 700;
  color: rgba(10, 10, 10, 0.7);
  margin-bottom: 0.4rem;
}

.field-error {
  margin: -0.6rem 0 0.9rem;
  color: #b91c1c;
  font-size: 13px;
  font-weight: 600;
  text-align: left;
}

.form-footer {
  margin-top: 1rem;
  font-size: 14px;
  color: rgba(10, 10, 10, 0.7);
}

.form-footer a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
}

.alert-error {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0.2rem 0 1rem;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #f2a3a3;
  background: #ffe9e9;
  color: #b42318;
  font-weight: 700;
  font-size: 14px;
  text-align: left;
  box-shadow: 0 8px 18px rgba(180, 35, 24, 0.08);
}

.alert-error i {
  font-size: 16px;
}


.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 2rem 0;
  position: relative;
  color: rgba(10, 10, 10, 0.45);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(10, 10, 10, 0.1);
  margin: 0 1rem;
}

/* ====== SOCIAL BUTTONS ====== */
.btn-social {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: none;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.08);
}

.btn-social:hover {
  filter: brightness(1.02);
  transform: translateY(-1px);
}

.btn-social img {
  width: 26px;
  height: 26px;
}

.btn-social.google {
  background: linear-gradient(135deg, #4285f4 0%, #1a73e8 100%);
}

.btn-social.is-disabled {
  filter: grayscale(0.6);
  opacity: 0.7;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-social.bankid {
  background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
}

.signup-text {
  font-size: 15px;
  font-weight: 600;
  margin-top: 0.5rem;
}

.signup-text a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatIn {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-6px);
  }
  100% {
    transform: translateY(0px);
  }
}

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .menu {
    flex-wrap: wrap;
    justify-content: center;
  }

  .signin-box {
    width: 92%;
    max-width: 600px;
    min-width: 320px;
    padding: 2.2rem 1.8rem;
  }

  .btn-login,
  .btn-social,
  .input-field {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  .title {
    font-size: 24px;
  }

  .subtitle {
    font-size: 14px;
  }

  .input-field,
  .btn-login,
  .btn-social {
    font-size: 14px;
    padding: 12px;
  }

  .confetti {
    width: 70px;
  }

  .divider {
    margin: 1.5rem 0;
  }
}

@media (min-width: 1200px) {
  .signin-box {
    max-width: 640px;
  }
}