@charset "utf-8";
/* CSS Reset & Base Styles */
body,
h1,
h2,
p,
a {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", sans-serif;
}

/* Main Container */
.main-container {
  padding: 1rem;
}

.container-inner {
  /* max-w-4xl */
  margin-left: auto;
  margin-right: auto;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 3rem;
  /* mb-12 */
}

.header h1 {
  font-family: "Noto Serif JP", serif;
  font-size: 2.25rem;
  /* text-4xl */
  font-weight: 700;
  /* font-bold */
  letter-spacing: 0.05em;
  /* tracking-wider */
  position: relative;
  display: inline-block;
  padding-bottom: 0.5rem;
}

.header h1::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #dc2626, #b91c1c);
  /* Noble Red Gradient */
  border-radius: 2px;
}

.header p {
  font-size: 1.125rem;
  /* text-lg */
  color: #4b5563;
  /* text-gray-600 */
  margin-top: 1.5rem;
  /* mt-6 */
}

/* Kisen Grid Layout */
.kisen-grid {
  display: grid;
  gap: 3rem;
  /* space-y-12 */
  margin-top: 3rem;
}

/* Kisen Card */
.kisen-card {
  background-color: #ffffff;
  padding: 1.5rem;
  /* p-6 */
  border-radius: 0.75rem;
  /* rounded-xl */
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  /* shadow-lg */
  border: 1px solid #e5e7eb;
  /* border-gray-200 */
}

.kisen-card-title {
  font-family: "Noto Serif JP", serif;
  font-size: 1.875rem;
  /* text-3xl */
  font-weight: 600;
  /* font-semibold */
  text-align: center;
  color: #b91c1c;
  /* text-red-700 */
  margin-bottom: 1.5rem;
  /* mb-6 */
}

.kisen-card-buttons {
  display: grid;
  gap: 1rem;
  /* gap-4 */
  grid-template-columns: 1fr;
}

/* Buttons */
.oushou-main-btn {
  display: block;
  text-decoration: none;
  text-align: center;
  padding: 0.75rem 1rem;
  /* py-3 px-4 */
  border-radius: 0.5rem;
  /* rounded-lg */
  transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.oushou-main-btn:hover {
  transform: translateY(-4px);
}

.oushou-main-btn:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.4);
}

/* Button Variants */
.oushou-main-btn-prelim {
  background-color: #f9fafb;
  /* bg-gray-50 */
  color: #374151;
  /* text-gray-700 */
  border: 1px solid #e5e7eb;
  /* border-gray-200 */
  box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  /* shadow-sm */
}

.oushou-main-btn-prelim:hover {
  background-color: #f3f4f6;
  /* hover:bg-gray-100 */
}

.oushou-main-btn-league {
  background-color: #ffffff;
  color: #1f2937;
  /* text-gray-800 */
  border: 1px solid #d1d5db;
  /* border-gray-300 */
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  /* shadow-md */
}

.oushou-main-btn-league:hover {
  background-color: #f3f4f6;
  /* hover:bg-gray-100 */
}

.oushou-main-btn-championship {
  background-image: linear-gradient(to right, #ef4444, #dc2626);
  /* from-red-600 to-red-700 */
  color: #ffffff;
  font-weight: 700;
  /* font-bold */
  border: 1px solid #b91c1c;
  /* border-red-700 */
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  /* shadow-lg */
}

.oushou-main-btn-championship:hover {
  background-image: linear-gradient(to right, #dc2626, #b91c1c);
  /* hover:from-red-700 hover:to-red-800 */
}

/* Responsive Styles for larger screens */
@media (min-width: 640px) {
  /* sm breakpoint */
  .main-container {
    padding: 2rem;
  }

  .header h1 {
    font-size: 3rem;
    /* sm:text-5xl */
  }

  .kisen-card-buttons-2-cols {
    grid-template-columns: repeat(2, 1fr);
  }

  .kisen-card-buttons-3-cols {
    grid-template-columns: repeat(3, 1fr);
  }
}