/* ================================================
   AURA Plastic Surgery — Reset & Base
   ================================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: var(--lh-normal);
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

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

ul,
ol {
    list-style: none;
}

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

input,
textarea,
select {
    font: inherit;
}

/* ── 레이아웃 컨테이너 ── */
.container {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--sp-xl);
}

section {
    padding: var(--section-pad) 0;
}

/* ── 섹션 공통 타이틀 ── */
.section-label {
    font-family: var(--font-display);
    font-size: var(--fs-sm);
    font-weight: var(--fw-regular);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    color: var(--color-secondary);
    display: block;
    margin-bottom: var(--sp-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--fs-h2);
    font-weight: var(--fw-light);
    line-height: var(--lh-tight);
    color: var(--color-text);
    margin-bottom: var(--sp-lg);
}

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

.section-desc {
    font-size: var(--fs-lg);
    color: var(--color-text-muted);
    line-height: var(--lh-loose);
    max-width: 560px;
}

/* ── 버튼 ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-xs);
    padding: 0.85em 2em;
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-wide);
    transition: all var(--ease-normal);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-secondary);
    color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-secondary-lt);
    box-shadow: var(--shadow-gold);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--color-secondary);
    color: var(--color-secondary);
}

.btn-outline:hover {
    background: var(--color-secondary);
    color: var(--color-primary);
}

.btn-ghost {
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: var(--color-text-light);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.7);
}

/* ── 스크롤 애니메이션 ── */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-slow), transform 0.8s var(--ease-slow);
}

.fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in {
    opacity: 0;
    transition: opacity 0.8s var(--ease-slow);
}

.fade-in.is-visible {
    opacity: 1;
}

/* 딜레이 유틸 */
.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

.delay-3 {
    transition-delay: 0.3s;
}

.delay-4 {
    transition-delay: 0.4s;
}

.delay-5 {
    transition-delay: 0.5s;
}

.delay-6 {
    transition-delay: 0.6s;
}

/* ── 골드 구분선 ── */
.divider-gold {
    width: 48px;
    height: 1px;
    background: var(--color-secondary);
    margin: var(--sp-lg) 0;
}

/* ── 모바일 ── */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--sp-lg);
    }

    .hide-mobile {
        display: none !important;
    }
}