@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@1.3.9/dist/web/static/pretendard.css');

:root {
    --font-body: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Montserrat', 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html,
body,
button,
input,
select,
textarea {
    font-family: var(--font-body);
}

body {
    word-break: keep-all;
    font-feature-settings: 'kern';
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
.page-title {
    font-family: var(--font-display);
    letter-spacing: -0.025em;
}

#main-header nav,
#mobile-menu,
.quick-menu {
    font-family: var(--font-body);
    letter-spacing: -0.015em;
}

#main-header nav {
    gap: clamp(0.1rem, 0.35vw, 0.4rem);
    font-size: clamp(1.25rem, 1.45vw, 1.5rem);
    line-height: 1.3;
    font-weight: 600;
}

#main-header > .container {
    max-width: 96rem;
}

#main-header nav > * {
    padding-left: clamp(0.2rem, 0.35vw, 0.4rem);
    padding-right: clamp(0.2rem, 0.35vw, 0.4rem);
}

#home h1,
.hero-title {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.035em;
}

#home p,
.hero-meta {
    font-family: var(--font-body);
    letter-spacing: -0.02em;
}

.header-main-row {
    gap: 0.75rem;
}

.header-utility {
    flex: 0 0 auto;
    gap: 0.35rem;
}

.theme-toggle {
    display: inline-flex;
    min-height: 2rem;
    align-items: center;
    gap: 0.4rem;
    padding: 0.28rem 0.45rem 0.28rem 0.6rem;
    border: 1px solid #dbe3ec;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.96);
    color: #475569;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
    cursor: pointer;
    user-select: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--color-primary-light);
    box-shadow: 0 3px 10px rgba(15, 23, 42, 0.12);
}

.theme-toggle:focus-within {
    outline: 3px solid color-mix(in srgb, var(--color-primary) 24%, transparent);
    outline-offset: 2px;
}

.theme-toggle-label {
    font-size: 0.68rem;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
}

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

.theme-toggle-track {
    position: relative;
    display: inline-flex;
    width: 2.15rem;
    height: 1.2rem;
    flex: 0 0 auto;
    align-items: center;
    border-radius: 999px;
    background: #004080;
    box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.12);
    transition: background-color 0.25s ease;
}

.theme-toggle-thumb {
    width: 0.9rem;
    height: 0.9rem;
    margin-left: 0.15rem;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.35);
    transition: transform 0.25s ease;
}

.theme-toggle-input:checked + .theme-toggle-track {
    background: #10828d;
}

.theme-toggle-input:checked + .theme-toggle-track .theme-toggle-thumb {
    transform: translateX(0.95rem);
}

[data-format-invalid="true"] {
    border-color: #dc2626 !important;
    background-color: #fef2f2 !important;
}

.format-validation-message {
    margin-top: 0.25rem;
    color: #dc2626;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.4;
}

@media (max-width: 479px) {
    .theme-toggle {
        min-height: 1.9rem;
        padding: 0.25rem 0.38rem;
    }

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

@media (min-width: 1024px) and (max-width: 1279px) {
    #main-header nav {
        gap: 0;
        font-size: 1.125rem;
    }

    #main-header nav > * {
        padding-left: 0.2rem;
        padding-right: 0.2rem;
    }

    .theme-toggle-label {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .theme-toggle,
    .theme-toggle-track,
    .theme-toggle-thumb {
        transition: none;
    }
}