/* ============================================
   Claude Design System — Design Tokens
   ============================================ */
:root {
    /* Surface */
    --clr-bg: #F5F4EE;
    --clr-bg-tint: #F0EEE6;
    --clr-surface: #FAF9F5;
    --clr-surface-alt: #F0EEE6;
    --clr-surface-raised: #FFFFFF;

    /* Text */
    --clr-text: #1F1E1B;
    --clr-text-muted: #61605C;
    --clr-text-subtle: #8D8B85;
    --clr-text-inverse: #FAF9F5;

    /* Border */
    --clr-border: #E8E6DF;
    --clr-border-strong: #D9D7CE;
    --clr-border-focus: #6BAA3A;

    /* Accent — 유페이퍼 Vivid Green */
    --clr-accent: #6BAA3A;
    --clr-accent-hover: #5C9533;
    --clr-accent-deep: #4A7E2A;
    --clr-accent-soft: #E2F0D1;
    --clr-accent-softer: #F1F8E5;

    /* Status — success 는 accent 와 동일 계열로 통합 */
    --clr-success: #6BAA3A;
    --clr-success-soft: #E2F0D1;
    --clr-danger: #B04B3B;
    --clr-danger-soft: #F4E4E0;
    --clr-info: #4A6B8A;

    /* Typography */
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard", system-ui, sans-serif;
    /* upaper.net 과 동일한 폰트 스택 (Pretendard 웹폰트는 _Layout 에서 CDN 로드) */
    --font-upaper: "Pretendard", -apple-system, "Malgun Gothic", sans-serif;
    --font-serif: "Source Serif 4", "Source Serif Pro", Georgia, "Nanum Myeongjo", serif;
    --font-mono: "JetBrains Mono", "Fira Code", "D2Coding", Consolas, monospace;

    /* Type scale (responsive) */
    --fs-display: clamp(2.5rem, 5vw + 1rem, 4.5rem);
    --fs-h1: clamp(2rem, 3vw + 1rem, 3rem);
    --fs-h2: clamp(1.5rem, 1.5vw + 1rem, 2rem);
    --fs-h3: 1.35rem;
    --fs-body: 1rem;
    --fs-sm: 0.875rem;
    --fs-xs: 0.8rem;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-pill: 9999px;

    /* Shadow */
    --shadow-xs: 0 1px 2px rgba(31, 30, 27, 0.03);
    --shadow-sm: 0 2px 4px rgba(31, 30, 27, 0.04), 0 1px 2px rgba(31, 30, 27, 0.03);
    --shadow-md: 0 6px 16px -4px rgba(31, 30, 27, 0.08), 0 2px 4px rgba(31, 30, 27, 0.04);
    --shadow-lg: 0 20px 40px -12px rgba(31, 30, 27, 0.15), 0 4px 8px rgba(31, 30, 27, 0.04);

    /* Motion */
    --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

    /* Focus ring */
    --ring: 0 0 0 3px var(--clr-accent-soft), 0 0 0 4px var(--clr-accent);
}

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

html {
    font-size: 15px;
    -webkit-text-size-adjust: 100%;
}
@media (min-width: 768px) {
    html { font-size: 16px; }
}

html {
    position: relative;
    min-height: 100%;
}

body {
    margin-bottom: 60px;
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    line-height: 1.6;
    color: var(--clr-text);
    letter-spacing: -0.005em;
    background-color: var(--clr-bg);
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(107, 170, 58, 0.06), transparent 60%),
        linear-gradient(180deg, var(--clr-bg) 0%, var(--clr-bg-tint) 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Headings */
h1, .h1 {
    font-family: var(--font-serif);
    font-size: var(--fs-h1);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: var(--clr-text);
}
h2, .h2 {
    font-family: var(--font-serif);
    font-size: var(--fs-h2);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--clr-text);
}
h3, .h3 {
    font-family: var(--font-serif);
    font-size: var(--fs-h3);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.015em;
    color: var(--clr-text);
}
h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    color: var(--clr-text);
    letter-spacing: -0.01em;
}
.display-4 {
    font-family: var(--font-serif);
    font-size: var(--fs-display);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.035em;
    color: var(--clr-text);
}

p { color: var(--clr-text); }

a {
    color: var(--clr-accent);
    text-decoration: none;
    transition: color 0.15s var(--ease);
}
a:hover {
    color: var(--clr-accent-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}

/* Selection */
::selection {
    background: var(--clr-accent-soft);
    color: var(--clr-accent-deep);
}

/* Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--clr-border-strong) transparent;
}
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
    background: var(--clr-border-strong);
    border-radius: var(--radius-pill);
    border: 2px solid transparent;
    background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover {
    background: var(--clr-text-subtle);
    background-clip: padding-box;
    border: 2px solid transparent;
}

/* ============================================
   Navbar
   ============================================ */
.navbar.bg-white {
    background-color: rgba(245, 244, 238, 0.85) !important;
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--clr-border) !important;
    box-shadow: none !important;
    padding: 0.5rem 0;
}

.navbar-brand {
    font-family: var(--font-serif);
    font-weight: 600;
    font-size: 1.35rem;
    color: var(--clr-text) !important;
    letter-spacing: -0.02em;
    padding: 0.25rem 0.5rem;
}

.navbar .nav-link.text-dark,
.navbar .nav-link {
    color: var(--clr-text-muted) !important;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-md);
    transition: color 0.15s var(--ease), background 0.15s var(--ease);
    position: relative;
}
.navbar .nav-link:hover {
    color: var(--clr-text) !important;
    background: var(--clr-surface-alt);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.925rem;
    border-radius: var(--radius-pill);
    padding: 0.5rem 1.1rem;
    letter-spacing: -0.005em;
    border-width: 1px;
    transition: all 0.2s var(--ease);
    position: relative;
}
.btn:focus-visible {
    outline: none;
    box-shadow: var(--ring) !important;
}
.btn:active {
    transform: translateY(1px);
}

.btn-lg {
    font-size: 1rem;
    padding: 0.7rem 1.5rem;
}

.btn-sm {
    font-size: 0.825rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-pill);
}

/* Primary */
.btn-primary {
    background: linear-gradient(180deg, #7CBB45, var(--clr-accent));
    border-color: var(--clr-accent);
    color: var(--clr-text-inverse);
    box-shadow: var(--shadow-xs), inset 0 1px 0 rgba(255,255,255,0.12);
}
.btn-primary:hover {
    background: linear-gradient(180deg, var(--clr-accent), var(--clr-accent-hover));
    border-color: var(--clr-accent-hover);
    color: var(--clr-text-inverse);
    box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,0.14);
    transform: translateY(-1px);
}
.btn-primary:active,
.btn-primary.active {
    background: var(--clr-accent-deep) !important;
    border-color: var(--clr-accent-deep) !important;
    transform: translateY(0);
}

/* Outlines */
.btn-outline-primary {
    color: var(--clr-accent);
    border-color: var(--clr-border-strong);
    background: transparent;
}
.btn-outline-primary:hover {
    background: var(--clr-accent-softer);
    border-color: var(--clr-accent);
    color: var(--clr-accent-hover);
    transform: translateY(-1px);
}

.btn-outline-secondary {
    color: var(--clr-text-muted);
    border-color: var(--clr-border-strong);
    background: transparent;
}
.btn-outline-secondary:hover {
    background: var(--clr-surface-alt);
    border-color: var(--clr-text-muted);
    color: var(--clr-text);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(180deg, #7CBB45, var(--clr-success));
    border-color: var(--clr-success);
    color: var(--clr-text-inverse);
    box-shadow: var(--shadow-xs), inset 0 1px 0 rgba(255,255,255,0.12);
}
.btn-success:hover, .btn-success:focus {
    background: linear-gradient(180deg, var(--clr-success), var(--clr-accent-deep));
    border-color: var(--clr-accent-deep);
    transform: translateY(-1px);
}

.btn-outline-success {
    color: var(--clr-success);
    border-color: var(--clr-border-strong);
    background: transparent;
}
.btn-outline-success:hover {
    background: var(--clr-success-soft);
    border-color: var(--clr-success);
    color: var(--clr-success);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(180deg, #BC5444, var(--clr-danger));
    border-color: var(--clr-danger);
    color: var(--clr-text-inverse);
    box-shadow: var(--shadow-xs), inset 0 1px 0 rgba(255,255,255,0.12);
}
.btn-danger:hover, .btn-danger:focus {
    background: linear-gradient(180deg, var(--clr-danger), #953E30);
    border-color: #953E30;
    transform: translateY(-1px);
}

.btn-outline-danger {
    color: var(--clr-danger);
    border-color: var(--clr-border-strong);
    background: transparent;
}
.btn-outline-danger:hover {
    background: var(--clr-danger-soft);
    border-color: var(--clr-danger);
    color: var(--clr-danger);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--clr-surface-alt);
    border-color: var(--clr-border);
    color: var(--clr-text);
}
.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--clr-border);
    border-color: var(--clr-border-strong);
    color: var(--clr-text);
    transform: translateY(-1px);
}

/* ============================================
   Forms
   ============================================ */
.form-control, .form-select {
    background-color: var(--clr-surface-raised);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    color: var(--clr-text);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    padding: 0.55rem 0.85rem;
    transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
    box-shadow: var(--shadow-xs);
}
.form-control:hover, .form-select:hover {
    border-color: var(--clr-border-strong);
}
.form-control:focus, .form-select:focus {
    background-color: var(--clr-surface-raised);
    border-color: var(--clr-border-focus);
    box-shadow: 0 0 0 3px var(--clr-accent-soft);
    color: var(--clr-text);
    outline: none;
}
.form-control::placeholder {
    color: var(--clr-text-subtle);
}

.form-control-lg {
    font-size: 1.05rem;
    padding: 0.7rem 1rem;
}

.form-label {
    color: var(--clr-text);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 0.4rem;
    letter-spacing: -0.005em;
}
.form-label.fw-bold { font-weight: 600; }

.form-text {
    color: var(--clr-text-muted);
    font-size: 0.8rem;
}

.input-group-text {
    background-color: var(--clr-surface-alt);
    border-color: var(--clr-border);
    color: var(--clr-text-muted);
    border-radius: var(--radius-md);
}

.form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 3px var(--clr-accent-soft);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background-color: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    box-shadow: none;
    transition: border-color 0.25s var(--ease),
                box-shadow 0.25s var(--ease),
                transform 0.25s var(--ease);
    overflow: hidden;
}
.card:hover {
    border-color: var(--clr-border-strong);
    box-shadow: var(--shadow-md) !important;
    transform: translateY(-2px);
}
.card.shadow-sm {
    box-shadow: var(--shadow-xs) !important;
}

.card-title {
    font-family: var(--font-serif);
    color: var(--clr-text);
    font-weight: 600;
    letter-spacing: -0.015em;
}
.card-title a {
    color: var(--clr-text) !important;
    transition: color 0.15s;
}
.card-title a:hover {
    color: var(--clr-accent) !important;
    text-decoration: none;
}
.card-text {
    color: var(--clr-text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}
.card-footer {
    background: transparent;
    border-top: 1px solid var(--clr-border);
    padding: 0.75rem 1rem;
}

/* ============================================
   Badges
   ============================================ */
.badge {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.72rem;
    letter-spacing: 0.01em;
    border-radius: var(--radius-pill);
    padding: 0.3em 0.75em;
    border: 1px solid transparent;
}
.badge.bg-primary {
    background-color: var(--clr-accent-softer) !important;
    color: var(--clr-accent-deep) !important;
    border-color: var(--clr-accent-soft);
}
.badge.bg-success {
    background-color: var(--clr-success-soft) !important;
    color: var(--clr-accent-deep) !important;
    border-color: rgba(107, 170, 58, 0.25);
}
.badge.bg-secondary {
    background-color: var(--clr-surface-alt) !important;
    color: var(--clr-text-muted) !important;
    border-color: var(--clr-border);
}

/* ============================================
   Modals
   ============================================ */
.modal-content {
    background-color: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}
.modal-header {
    border-bottom: 1px solid var(--clr-border);
    padding: 1.1rem 1.5rem;
}
.modal-body { padding: 1.5rem; }
.modal-title {
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: -0.015em;
}
.modal-footer {
    border-top: 1px solid var(--clr-border);
    padding: 1rem 1.5rem;
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    border-radius: var(--radius-md);
    border-width: 1px;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
}
.alert-danger {
    background-color: var(--clr-danger-soft);
    border-color: rgba(176, 75, 59, 0.25);
    color: #6B2E23;
}

/* ============================================
   Utility
   ============================================ */
.text-muted { color: var(--clr-text-muted) !important; }
.text-danger { color: var(--clr-danger) !important; }
.border-top, .border-bottom { border-color: var(--clr-border) !important; }

footer.footer {
    color: var(--clr-text-subtle);
    border-color: var(--clr-border) !important;
    background: transparent;
    font-size: 0.85rem;
}
footer.footer a {
    color: var(--clr-text-muted);
}
footer.footer .footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
footer.footer .footer-kakao {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
/* 카카오톡 채널 채팅 버튼 — 카카오 브랜드 색(노랑 배경 + 진갈색 아이콘/글자) */
.kakao-chat-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    /* 글자 크기는 유지하고 버튼 높이만 조정 */
    padding: 8px 14px;
    line-height: 1.2;
    border-radius: 16px;
    background: #FEE500;
    color: #3C1E1E !important;
    font-weight: 600;
    font-size: 0.78rem;
    text-decoration: none;
    transition: filter 0.15s ease;
}
.kakao-chat-btn svg {
    width: 15px;
    height: 15px;
}
.kakao-chat-btn:hover {
    filter: brightness(0.95);
    color: #3C1E1E !important;
}

/* ============================================
   Hero (landing / listing page headers)
   ============================================ */
.hero {
    padding: 1em 0 clamp(2.5rem, 6vw, 4.5rem);
    position: relative;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--clr-accent-deep);
    background: var(--clr-accent-softer);
    border: 1px solid var(--clr-accent-soft);
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-pill);
    margin-bottom: 1.25rem;
}
.hero-eyebrow::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--clr-accent);
    box-shadow: 0 0 0 3px var(--clr-accent-soft);
}
.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 1.6vw + 0.5rem, 1.75rem);   /* 두 단계 축소 (2026-08-13, 최초 1.75~2.5rem) */
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--clr-text);
    margin-bottom: 1rem;
}
.hero-title em {
    font-style: normal;          /* 이탤릭 제거 */
    color: var(--clr-accent);    /* 녹색 강조는 유지 */
    font-weight: 600;
}
.hero-subtitle {
    font-family: var(--font-upaper);   /* upaper.net 동일 폰트 (Pretendard) */
    font-size: 1rem;             /* 두 단계 축소 (2026-08-13, 최초 1.25rem) */
    line-height: 1.6;
    color: var(--clr-text-muted);
    max-width: 42rem;
    margin-bottom: 2rem;
}

/* ============================================
   Section header (for listing pages)
   ============================================ */
.page-header {
    padding: 1em 0 0.5rem;
    border-bottom: 1px solid var(--clr-border);
    margin-bottom: 0.5rem;
}
.page-header .page-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;       /* Bootstrap h4 사이즈 (판매신청 헤더와 동일) */
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 0.2rem;
}
.page-header .page-subtitle {
    color: var(--clr-text-muted);
    font-size: 0.875rem;
    margin: 0;
}

/* ============================================
   Feature card (landing)
   ============================================ */
.feature-card {
    font-family: var(--font-upaper);   /* upaper.net 동일 폰트 (Pretendard) — h3/p 상속 */
    padding: 1.75rem;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    height: 100%;
    transition: all 0.25s var(--ease);
}
.feature-card:hover {
    border-color: var(--clr-border-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.feature-card .feature-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--clr-accent-softer);
    color: var(--clr-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}
.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}
.feature-card p {
    color: var(--clr-text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
    margin: 0;
}

/* ============================================
   프로젝트 카드 (목록)
   ============================================ */
.project-card .project-cover-wrap {
    flex: 0 0 108px;
    width: 108px;
    padding: 14px 0 14px 14px;
}

.project-card .project-cover {
    width: 100px;
    height: 140px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 10px -2px rgba(31, 30, 27, 0.18), 0 1px 2px rgba(31, 30, 27, 0.06);
    display: block;
    transition: transform 0.3s var(--ease);
}

.project-card:hover .project-cover {
    transform: scale(1.03) rotate(-0.5deg);
}

.project-card .project-cover-placeholder {
    background: linear-gradient(135deg, var(--clr-surface-alt) 0%, var(--clr-border) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-subtle);
}

.project-card .card-body {
    padding: 14px 14px 14px 14px;
}

/* ============================================
   Empty state
   ============================================ */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    max-width: 28rem;
    margin: 0 auto;
}
.empty-state .empty-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-xl);
    background: var(--clr-accent-softer);
    color: var(--clr-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--clr-accent-soft);
}
.empty-state h5 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 0.5rem;
}
.empty-state p {
    color: var(--clr-text-muted);
    margin-bottom: 1.5rem;
}

/* ============================================
   Divider (section)
   ============================================ */
.soft-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--clr-border-strong), transparent);
    border: 0;
    margin: 2rem 0;
}