/* =============================================
   ADCORP Base & Reset
   ============================================= */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');
@import './tokens.css';

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--fw-regular);
  line-height: var(--leading-normal);
  color: var(--color-dark);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}

img, video, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

/* =============================================
   Layout Utilities
   ============================================= */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.section {
  padding-block: var(--section-py);
}

.section--sm {
  padding-block: var(--section-py-sm);
}

.section--alt {
  background: var(--color-surface-alt);
}

.section--dark {
  background: var(--color-gray-900);
  color: var(--color-white);
}

/* =============================================
   Typography Utilities
   ============================================= */

.section-eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-brand-dark);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
  font-weight: var(--fw-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--color-dark);
}

.section-title--white {
  color: var(--color-white);
}

.section-desc {
  font-size: clamp(var(--text-base), 1.5vw, var(--text-lg));
  color: var(--color-gray-700);
  line-height: var(--leading-loose);
  margin-top: var(--space-5);
}

.section-desc--white {
  color: rgba(255,255,255,0.75);
}

/* =============================================
   Button System
   ============================================= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: var(--fw-semibold);
  line-height: 1;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-brand);
}

.btn--primary:hover {
  background: var(--color-brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255,54,89,.30);
}

.btn--secondary {
  background: transparent;
  color: var(--color-dark);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
  background: var(--color-brand-light);
}

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.4);
}

.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 8px 24px rgba(255,54,89,0.28);
}

.btn--accent:hover {
  background: var(--color-brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255,54,89,0.35);
}

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

.btn--kakao:hover {
  background: #F5D900;
  transform: translateY(-2px);
}

.btn--lg {
  padding: 1.1rem 2.25rem;
  font-size: var(--text-lg);
}

.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--text-sm);
}

.btn svg {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

/* =============================================
   Card Base
   ============================================= */

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

/* =============================================
   Tag / Badge
   ============================================= */

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  background: var(--color-brand-light);
  color: var(--color-brand-dark);
  letter-spacing: 0.03em;
}

/* =============================================
   Grid Helpers
   ============================================= */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4,
  .grid-3,
  .grid-2 { grid-template-columns: 1fr; }
}

/* =============================================
   Divider
   ============================================= */

.divider {
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-12);
}

/* =============================================
   Visually Hidden (접근성)
   ============================================= */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}