/* =============================================================
 * 제천 캠퍼스 라이프 패스 — Design System (Global)
 * Inspired by State Library Victoria, La Trobe Reading Room
 * ============================================================= */

@import url("https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap");
@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css");

:root {
    /* --- Color · 주조색 --- */
    --color-cream-white: #FAF7F0;
    --color-off-white:   #F5F1E8;
    --color-wood-brown:  #8B6F47;
    --color-dark-wood:   #5C4A35;

    /* --- Color · 보조색 --- */
    --color-gold:        #C9A961;
    --color-gold-warm:   #D4A574;
    --color-charcoal:    #2C2620;
    --color-light-gray:  #E8E2D5;

    /* --- Semantic aliases --- */
    --color-bg:           var(--color-cream-white);
    --color-bg-alt:       var(--color-off-white);
    --color-surface:      #FFFFFF;
    --color-text:         var(--color-dark-wood);
    --color-text-muted:   var(--color-wood-brown);
    --color-heading:      var(--color-charcoal);
    --color-accent:       var(--color-gold);
    --color-accent-hover: var(--color-dark-wood);
    --color-border:       var(--color-light-gray);

    /* --- Typography · Families --- */
    --font-serif: "Cormorant Garamond", "Noto Serif KR", Georgia, "Times New Roman", serif;
    --font-sans:  "Inter", "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, -apple-system, sans-serif;
    --font-kr:    "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;

    /* --- Typography · Scale --- */
    --fs-xs:   0.75rem;
    --fs-sm:   0.875rem;
    --fs-base: 1rem;
    --fs-md:   1.0625rem;
    --fs-lg:   1.25rem;
    --fs-xl:   1.5rem;
    --fs-2xl:  2rem;
    --fs-3xl:  2.5rem;
    --fs-4xl:  3.5rem;
    --fs-5xl:  4.5rem;
    --fs-6xl:  6rem;

    /* --- Typography · Line heights --- */
    --lh-tight: 1.15;
    --lh-snug:  1.35;
    --lh-base:  1.7;     /* slightly looser for Korean readability */
    --lh-loose: 1.85;

    /* --- Typography · Letter spacing --- */
    --ls-tighter: -0.03em;
    --ls-tight:   -0.015em;
    --ls-normal:  0;
    --ls-wide:    0.05em;
    --ls-wider:   0.12em;
    --ls-widest:  0.2em;

    /* --- Typography · Weights --- */
    --fw-regular:  400;
    --fw-medium:   500;
    --fw-semibold: 600;
    --fw-bold:     700;

    /* --- Spacing --- */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-5:  1.25rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* --- Layout --- */
    --container-max:  1200px;
    --container-px:   1.5rem;

    /* --- Radius --- */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;

    /* --- Shadow (warm-toned) --- */
    --shadow-sm: 0 1px 3px rgba(44, 38, 32, 0.05);
    --shadow-md: 0 4px 16px rgba(44, 38, 32, 0.07);
    --shadow-lg: 0 12px 36px rgba(44, 38, 32, 0.1);

    /* --- Motion --- */
    --ease-out:      cubic-bezier(0.22, 0.61, 0.36, 1);
    --duration-fast: 150ms;
    --duration-base: 250ms;
}

/* =============================================================
 * Reset
 * ============================================================= */

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

html, body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote,
ul, ol, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

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

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; padding: 0; }

/* =============================================================
 * Base · Document
 * ============================================================= */

html {
    /* Slightly larger base for older readers (60대 시청 담당자 가독성) */
    font-size: 17px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: var(--lh-base);
    font-weight: var(--fw-regular);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

::selection { background-color: var(--color-gold); color: var(--color-charcoal); }

/* =============================================================
 * Base · Typography
 * ============================================================= */

h1, h2, h3, h4 {
    color: var(--color-heading);
    font-family: var(--font-serif);
    font-weight: var(--fw-medium);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
}

h5, h6 {
    color: var(--color-heading);
    font-family: var(--font-sans);
    font-weight: var(--fw-semibold);
    line-height: var(--lh-snug);
}

h1 { font-size: clamp(var(--fs-3xl), 5vw, var(--fs-5xl)); font-weight: var(--fw-semibold); letter-spacing: var(--ls-tighter); }
h2 { font-size: clamp(var(--fs-2xl), 3.5vw, var(--fs-4xl)); }
h3 { font-size: clamp(var(--fs-xl), 2.4vw, var(--fs-2xl)); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-md); }
h6 { font-size: var(--fs-sm); letter-spacing: var(--ls-wider); text-transform: uppercase; }

p { margin-bottom: var(--space-4); }
p:last-child { margin-bottom: 0; }

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}
a:hover { color: var(--color-accent-hover); }

strong, b { color: var(--color-heading); font-weight: var(--fw-semibold); }
small { font-size: var(--fs-sm); color: var(--color-text-muted); }
hr { border: 0; border-top: 1px solid var(--color-border); margin: var(--space-12) 0; }

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

.font-serif { font-family: var(--font-serif); }
.font-sans  { font-family: var(--font-sans); }
.font-kr    { font-family: var(--font-kr); }

.eyebrow,
.section-eyebrow {
    display: inline-block;
    margin-bottom: var(--space-3);
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    color: var(--color-wood-brown);
}

.lead { font-size: var(--fs-md); line-height: var(--lh-loose); color: var(--color-text); }
.muted { color: var(--color-text-muted); }

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

.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;
}

/* =============================================================
 * Accessibility
 * ============================================================= */

:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* =============================================================
 * Components · Buttons
 * ============================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5em;
    padding: 0.875rem 1.875rem;
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-wide);
    text-transform: uppercase;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-charcoal);
    transition: background var(--duration-base) var(--ease-out),
                color var(--duration-base) var(--ease-out),
                border-color var(--duration-base) var(--ease-out);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary { background: var(--color-gold); border-color: var(--color-gold); color: var(--color-charcoal); }
.btn-primary:hover { background: var(--color-dark-wood); border-color: var(--color-dark-wood); color: var(--color-cream-white); }

.btn-ghost { background: transparent; border-color: var(--color-dark-wood); color: var(--color-dark-wood); }
.btn-ghost:hover { background: var(--color-dark-wood); color: var(--color-cream-white); }

/* =============================================================
 * Components · Scroll Progress Bar
 * ============================================================= */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-gold);
    transform: scaleX(0);
    transform-origin: left center;
    z-index: 9999;
    pointer-events: none;
    transition: transform 120ms linear;
    will-change: transform;
}

/* =============================================================
 * Components · Site Header
 * ============================================================= */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(250, 247, 240, 0.94);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-charcoal);
}

/* Arched-top mark — small reference to arched library windows */
.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 42px;
    border: 1px solid var(--color-gold);
    border-radius: 18px 18px 2px 2px;
    background: var(--color-surface);
    color: var(--color-gold);
    font-family: var(--font-serif);
    font-size: 13px;
    font-weight: var(--fw-semibold);
    letter-spacing: 0.06em;
}

.brand-name {
    font-family: var(--font-serif);
    font-size: var(--fs-md);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-tight);
    color: var(--color-charcoal);
}

.site-nav ul { display: flex; gap: var(--space-8); }

.site-nav a {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-wide);
    color: var(--color-text);
}
.site-nav a:hover { color: var(--color-gold); }
.site-nav a[aria-current="page"] { color: var(--color-gold); }

/* =============================================================
 * Components · Sections
 * ============================================================= */

.section { padding: var(--space-24) 0; }

.section-alt {
    background: var(--color-off-white);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    margin: 0 0 var(--space-6);
    font-family: var(--font-serif);
    font-size: clamp(var(--fs-2xl), 3.5vw, var(--fs-4xl));
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-tight);
    color: var(--color-charcoal);
}

.section-lead {
    max-width: 720px;
    margin: 0 0 var(--space-16);
    font-size: var(--fs-md);
    line-height: var(--lh-loose);
    color: var(--color-text);
}

/* =============================================================
 * Components · Site Footer
 * ============================================================= */

.site-footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-charcoal);
    color: rgba(245, 241, 232, 0.8);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
}

.footer-brand .brand-name { color: var(--color-cream-white); display: inline-block; }
.footer-brand p {
    margin-top: var(--space-3);
    max-width: 38ch;
    font-size: var(--fs-sm);
    color: rgba(245, 241, 232, 0.6);
    line-height: var(--lh-loose);
}

.footer-col h4 {
    margin-bottom: var(--space-4);
    color: var(--color-gold);
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
}

.footer-col ul { display: grid; gap: var(--space-2); }

.footer-col li,
.footer-col a {
    font-family: var(--font-kr);
    font-size: var(--fs-sm);
    color: rgba(245, 241, 232, 0.7);
    line-height: var(--lh-base);
}
.footer-col a:hover { color: var(--color-gold); }

.footer-bottom {
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid rgba(245, 241, 232, 0.15);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-3);
    font-size: var(--fs-xs);
    color: rgba(245, 241, 232, 0.5);
    letter-spacing: var(--ls-wide);
}

.footer-disclaimer {
    margin: var(--space-6) 0 0;
    padding-top: var(--space-4);
    text-align: center;
    font-family: var(--font-kr);
    font-size: 12px;
    line-height: var(--lh-loose);
    color: #8B7B6B;
    letter-spacing: var(--ls-wide);
}

/* =============================================================
 * Responsive
 * ============================================================= */

@media (max-width: 960px) {
    .footer-inner { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
    html { font-size: 16px; }
    .site-nav { display: none; }
    .header-inner { height: 64px; }
    .section { padding: var(--space-16) 0; }
    .footer-inner { grid-template-columns: 1fr; gap: var(--space-8); }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* =============================================================
 * Print — for PDF demo handouts
 * ============================================================= */

@media print {
    :root { --color-bg: #fff; --color-text: #000; --color-heading: #000; }
    body { background: white; color: black; font-size: 11pt; line-height: 1.5; }
    .site-header { position: static; background: white; border-bottom: 1px solid #999; }
    .site-nav, .hero-actions, .footer-bottom { display: none !important; }
    .section, .hero { padding: 1.5rem 0; page-break-inside: avoid; background: white !important; }
    .section-alt { background: white; }
    .site-footer { background: white; color: black; padding: 1rem 0; border-top: 1px solid #999; }
    .footer-col h4, .footer-brand .brand-name { color: black; }
    .footer-col li, .footer-col a, .footer-brand p { color: black; }
    a { color: black; text-decoration: underline; }
    a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.85em; }
    .stat-card, .pass-card, .step-card, .number-row { page-break-inside: avoid; border-color: #999 !important; }
    h1, h2, h3, h4 { page-break-after: avoid; color: black !important; }
}