/* --- [CSS 변수 설정 (테마용)] --- */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --primary-color: #ff4b4b; /* 틴더 감성의 매력적인 레드핑크 */
    --primary-hover: #ff3333;
    --card-bg: #f8f9fa;
    --border-color: #eaeaea;
    --navbar-bg: rgba(255, 255, 255, 0.95);
}

/* 다크 모드일 때 변수값 덮어쓰기 */
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #f5f5f5;
    --text-muted: #aaaaaa;
    --primary-color: #ff6b6b;
    --primary-hover: #ff4b4b;
    --card-bg: #1e1e1e;
    --border-color: #333333;
    --navbar-bg: rgba(18, 18, 18, 0.95);
}

/* --- [기본 초기화] --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease; /* 테마 변경 시 부드럽게 */
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- [네비게이션 바] --- */
.navbar {
    position: fixed;
    top: 0; width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: var(--navbar-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.theme-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
}

.login-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
}

/* --- [히어로 섹션] --- */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 5% 2rem;
}

.badge {
    display: inline-block;
    background-color: rgba(255, 75, 75, 0.1);
    color: var(--primary-color);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 2.8rem;
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

.highlight {
    color: var(--primary-color);
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

button.btn-primary, button.btn-secondary {
    padding: 1rem 2rem;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 75, 75, 0.3);
}

.btn-secondary {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

/* --- [기능 섹션] --- */
.features {
    padding: 5rem 5%;
    text-align: center;
}

.features h2 {
    margin-bottom: 3rem;
    font-size: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2.5rem 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- [푸터] --- */
footer {
    text-align: center;
    padding: 3rem 5%;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.footer-sub {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* --- [모바일 반응형] --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .cta-group { flex-direction: column; }
    button.btn-primary, button.btn-secondary { width: 100%; }
}

/* --- [모달창 (팝업) 스타일] --- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.modal-content {
    background: var(--bg-color);
    padding: 2.5rem;
    border-radius: 20px;
    width: 90%;
    max-width: 450px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.modal-overlay.hidden .modal-content {
    transform: translateY(20px);
}

.close-btn {
    position: absolute;
    top: 1.5rem; right: 1.5rem;
    background: none; border: none;
    font-size: 1.5rem; color: var(--text-muted);
    cursor: pointer;
}

.modal-content h2 { margin-bottom: 0.5rem; color: var(--text-color); }
.modal-sub { color: var(--text-muted); margin-bottom: 1.5rem; font-size: 0.9rem; }

.input-group, .row-group, .file-upload-group { margin-bottom: 1rem; }
.row-group { display: flex; gap: 0.5rem; }

input, select {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
}

.file-upload-group label {
    display: block;
    background: var(--card-bg);
    border: 2px dashed var(--primary-color);
    color: var(--primary-color);
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    font-weight: bold;
}
.file-upload-group input[type="file"] { display: none; } /* 진짜 파일 인풋은 숨김 */

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    margin-top: 1rem;
}








.coming-soon {
    text-align: center;
    padding: 5rem 5%;
    margin-top: 2rem;
    background: linear-gradient(180deg, transparent, rgba(255, 75, 75, 0.05));
    border-top: 1px dashed var(--border-color);
}

.coming-soon-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.coming-soon h2 {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 4px;
    background: linear-gradient(45deg, var(--primary-color), #ff8a00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 2s infinite;
}

.coming-soon p {
    font-size: 1.2rem;
    color: var(--text-muted);
    font-weight: bold;
}

/* 두근거리는(Pulse) 애니메이션 효과 */
@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(1); opacity: 0.8; }
}