:root {
    --sm-bg: #ffffff;
    --sm-text: #17181c;
    --sm-muted: #666b76;
    --sm-line: #e3e5ea;
    --sm-accent: #2b59ff;
    --sm-radius: 10px;
}

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

html, body { margin: 0; padding: 0; }

body {
    background: var(--sm-bg);
    color: var(--sm-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--sm-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font: inherit; cursor: pointer; }

.inner { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.sm-header { border-bottom: 1px solid var(--sm-line); background: #fff; position: sticky; top: 0; z-index: 20; }
.sm-logo-en { margin-left: 4px; color: #6b7280; font-size: 11px; font-weight: 600; letter-spacing: .12em; }
.sm-header .inner { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.sm-logo { font-weight: 800; font-size: 18px; color: var(--sm-text); letter-spacing: -0.02em; }
.sm-logo:hover { text-decoration: none; }
.sm-nav { display: flex; gap: 18px; flex: 1; flex-wrap: wrap; }
.sm-nav a { color: var(--sm-text); font-size: 14px; }
.sm-account { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.sm-user { color: var(--sm-muted); }
.sm-logout { margin: 0; }
.sm-text-btn { background: none; border: 0; color: var(--sm-muted); padding: 0; }
.sm-text-btn:hover { color: var(--sm-text); }

.sm-footer { border-top: 1px solid var(--sm-line); margin-top: 64px; padding: 28px 0; color: var(--sm-muted); font-size: 13px; }
.sm-footer p { margin: 4px 0; }
.sm-footer-links a { color: var(--sm-muted); }

.skills-page { max-width: 1200px; margin: 0 auto; padding: 32px 20px 0; }
.error-page { min-height: 100vh; display: grid; place-items: center; text-align: center; }
.error-page main { padding: 40px; }

.sm-auth-page { background: #f6f7fb; }
.sm-auth { max-width: 380px; margin: 10vh auto; background: #fff; padding: 36px 32px; border-radius: 16px; border: 1px solid var(--sm-line); }
.sm-auth h1 { margin: 0 0 8px; font-size: 24px; }
.sm-auth-desc { margin: 0 0 24px; color: var(--sm-muted); font-size: 14px; }
.sm-form { display: grid; gap: 8px; }
.sm-form label { font-size: 13px; font-weight: 600; margin-top: 8px; }
.sm-form input { height: 44px; padding: 0 12px; border: 1px solid var(--sm-line); border-radius: var(--sm-radius); font: inherit; }
.sm-form input:focus { outline: 2px solid rgba(43, 89, 255, 0.25); border-color: var(--sm-accent); }
.sm-btn { margin-top: 16px; height: 46px; border: 0; border-radius: var(--sm-radius); background: var(--sm-text); color: #fff; font-weight: 700; }
.sm-btn:hover { background: #2c2e35; }
.sm-alert { margin: 0 0 12px; padding: 10px 12px; border-radius: 8px; background: #fff2f2; color: #b3261e; font-size: 13px; }
.sm-auth-note { margin: 20px 0 0; color: var(--sm-muted); font-size: 12px; }
.sm-link { color: var(--sm-text); }