/* Main Styles - (주)MetaSpatium */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;700;900&family=Orbitron:wght@700;900&display=swap');

@import 'reset.css';
@import 'variables.css';
@import 'nav.css';
@import 'sections.css';
@import 'responsive.css';

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

/* Button Base */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid var(--color-accent1);
  color: var(--color-accent1);
  background: transparent;
  transition: all var(--transition-base);
}

.btn:hover {
  background: var(--color-accent1);
  color: var(--color-text);
}

.btn-secondary {
  border-color: var(--color-accent2);
  color: var(--color-accent2);
}

.btn-secondary:hover {
  background: var(--color-accent2);
  color: var(--color-text);
}

/* Section Title */
.section-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 2.5rem;
  text-align: center;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Back to Top - Floating Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent1);
  color: var(--color-text);
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(0, 109, 170, 0.4);
  transition: all var(--transition-base);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-accent2);
  transform: translateY(-4px);
  box-shadow: 0 6px 24px rgba(0, 109, 170, 0.5);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
}