@import url("https://fonts.googleapis.com/css2?family=Oswald:wght@200..700&display=swap");

:root {
  --mig-color-1: #165341;
  --mig-color-2: #b3903e;
  --kospi-primary: #00253c;
  --kospi-secondary: #e5de12;
  --klms-color-1: #f17609;
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --accent-color: #4895ef;
  --dark-color: #1a1a2e;
  --light-color: #f8f9fa;
  --success-color: #4cc9f0;
  --danger-color: #f72585;
  --warning-color: #f8961e;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  --transition: all 0.4s ease;
}

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

body {
  background-color: var(--light-color);
  overflow-x: hidden;
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  padding: 1rem 5rem;
  align-items: center;
  background-color: white;
  box-shadow: var(--box-shadow);
  z-index: 10;
  position: relative;
}

.nav-links {
  display: flex;
  gap: 3rem;
}

.nav-links li {
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark-color);
  font-size: 1.1rem;
  position: relative;
}

.nav-links a::after {
  content: "";
  width: 0;
  height: 2px;
  background-color: var(--mig-color-1);
  position: absolute;
  left: 0;
  bottom: -4px;
  transition: 0.4s;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links li .login-btn {
  background-color: var(--kospi-primary);
  padding: 0.5rem 1.5rem;
  color: white;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-links li .login-btn:hover {
  background-color: var(--kospi-secondary);
  color: var(--kospi-primary);
  transform: translateY(-3px);
}

.logo {
  max-width: 60px;
}

/* --- Main --- */

main {
  width: 100%;
  height: 90vh;
  background-color: white;
  box-shadow: var(--box-shadow);
  border-radius: var(--border-radius);
  padding: 2rem;
  display: flex;
  justify-content: space-around;
}

main .login-input-container {
  padding: 2rem;
  margin-left: 3rem;
  min-width: 400px;
  max-height: 500px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--box-shadow);
  border-radius: var(--border-radius);
}

main .title {
  text-align: center;
}

form {
  display: flex;
  flex-direction: column;
}

form .input-container {
  display: flex;
  flex-direction: column;
}

form .input-container label {
  margin-bottom: 0.3rem;
  color: #333;
}

form .input-container input {
  padding: 0.7rem 0.6rem;
  margin-bottom: 1rem;
  border-radius: var(--border-radius);
  border: 1px solid #ccc;
}

form .btn-container {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

form .btn-container input[type="submit"] {
  padding: 0.7rem 0rem;
  border: 1px solid #ccc;
}

form .btn-container .login-btn {
  background-color: var(--kospi-secondary);
  color: var(--kospi-primary);
  border-radius: var(--border-radius);
}

form .btn-container .login-btn:hover {
  background-color: #dedb1d;
  cursor: pointer;
}

.cancel-btn {
  text-align: center;
  display: block;
  padding: 0.6rem 0;
  background-color: black;
  color: white;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--transition);
}

.cancel-btn:hover {
  background-color: #333;
  color: #fff;
}

main .side-text-container {
  max-width: 500px;
  padding-top: 5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.side-text-title {
  color: var(--kospi-primary);
}

.side-sub-title {
  color: var(--kospi-secondary);
}

.side-desc {
  color: var(--kospi-primary);
}

/* Responsive Design - Mobile First Approach */
/* All original color properties preserved */

/* Small devices (phones, 320px and up) */
@media screen and (max-width: 480px) {
  .header {
    padding: 1rem 1.5rem;
  }
  
  .nav-links {
    gap: 1.5rem;
  }
  
  .nav-links a {
    font-size: 1rem;
  }
  
  .nav-links li .login-btn {
    padding: 0.4rem 1rem;
  }
  
  .logo {
    max-width: 70px;
  }
  
  main {
    height: auto;
    min-height: 90vh;
    padding: 1.5rem;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
  }
  
  main .login-input-container {
    margin-left: 0;
    min-width: unset;
    width: 100%;
    max-width: 350px;
    padding: 1.5rem;
    max-height: none;
  }
  
  main .side-text-container {
    max-width: 350px;
    padding-top: 1rem;
    text-align: center;
  }
  
  .side-text-title {
    font-size: 1.6rem;
  }
  
  .side-sub-title {
    font-size: 1.1rem;
  }
  
  .side-desc {
    font-size: 0.95rem;
  }
  
  form .btn-container {
    margin-top: 1.5rem;
  }
}

/* Medium devices (tablets, 481px to 768px) */
@media screen and (min-width: 481px) and (max-width: 768px) {
  .header {
    padding: 1rem 2rem;
  }
  
  .nav-links {
    gap: 2rem;
  }
  
  main {
    height: auto;
    min-height: 90vh;
    padding: 2rem;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 3rem;
  }
  
  main .login-input-container {
    margin-left: 0;
    min-width: unset;
    width: 100%;
    max-width: 400px;
    max-height: none;
  }
  
  main .side-text-container {
    max-width: 450px;
    padding-top: 2rem;
    text-align: center;
  }
  
  .side-text-title {
    font-size: 1.8rem;
  }
}

/* Large devices (laptops/desktops, 769px to 1024px) */
@media screen and (min-width: 769px) and (max-width: 1024px) {
  .header {
    padding: 1rem 3rem;
  }
  
  .nav-links {
    gap: 2.5rem;
  }
  
  main {
    height: auto;
    min-height: 90vh;
    padding: 2rem;
    gap: 2rem;
  }
  
  main .login-input-container {
    margin-left: 1rem;
    min-width: 350px;
  }
  
  main .side-text-container {
    max-width: 400px;
    padding-top: 3rem;
  }
}

/* Extra large devices (large laptops/desktops, 1025px to 1365px) */
@media screen and (min-width: 1025px) and (max-width: 1365px) {
  .header {
    padding: 1rem 4rem;
  }
  
  main {
    padding: 2rem;
  }
  
  main .login-input-container {
    margin-left: 2rem;
    min-width: 380px;
  }
  
  main .side-text-container {
    max-width: 450px;
    padding-top: 4rem;
  }
}

/* Original 1366px breakpoint - preserving all color changes */
@media screen and (max-width: 1366px) {
  main {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4rem 2rem;
    gap: 4rem;
    height: auto;
  }

  .login-input-container {
    max-width: 420px;
    padding: 2rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.6s ease-in-out both;
    transform: translateY(10px);
  }

  .side-text-container {
    max-width: 500px;
    padding: 2rem;
    text-align: left;
    line-height: 1.6;
    animation: fadeInRight 0.8s ease-in-out both;
    color: #333;
  }

  .side-text-title {
    font-size: 2rem;
  }

  .side-sub-title {
    font-size: 1.2rem;
  }

  .side-desc {
    font-size: 1rem;
  }
}

/* Original 768px breakpoint - preserved */
@media (max-width: 768px) {
  main {
    flex-direction: column;
    align-items: center;
    height: auto;
  }

  .login-input-container,
  .side-text-container {
    width: 90%;
    margin: 1rem 0;
  }

  .login-input-container {
    margin-left: 0;
  }

  .side-text-container {
    padding-top: 1rem;
    text-align: center;
  }
}

/* Smooth fade animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Full HD TVs or large monitors - preserved */
@media screen and (min-width: 2000px) {
  .desc h1,
  .klms-desc-container h2 {
    font-size: 3rem;
  }

  .main-logo {
    width: 800px;
  }

  .box-container {
    gap: 5rem;
  }
}

/* Additional responsive fixes for very small devices */
@media screen and (max-width: 320px) {
  .header {
    padding: 0.8rem 1rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .nav-links a {
    font-size: 0.9rem;
  }
  
  .nav-links li .login-btn {
    padding: 0.3rem 0.8rem;
  }
  
  .logo {
    max-width: 60px;
  }
  
  main .login-input-container {
    padding: 1rem;
  }
  
  .side-text-title {
    font-size: 1.4rem;
  }
  
  .side-sub-title {
    font-size: 1rem;
  }
  
  .side-desc {
    font-size: 0.9rem;
  }
  
  form .input-container input {
    padding: 0.6rem 0.5rem;
  }
  
  form .btn-container input[type="submit"],
  .cancel-btn {
    padding: 0.5rem 0;
  }
}

/* Landscape mode for phones */
@media screen and (max-height: 500px) and (orientation: landscape) {
  main {
    height: auto;
    min-height: 100vh;
    padding: 1rem;
  }
  
  .login-input-container {
    max-width: 350px;
    padding: 1rem;
  }
  
  .side-text-container {
    padding-top: 0.5rem;
  }
  
  form .input-container input {
    padding: 0.4rem 0.5rem;
    margin-bottom: 0.5rem;
  }
  
  form .btn-container {
    margin-top: 1rem;
  }
}