@import url('https://fonts.cdnfonts.com/css/br-cobane');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');
@import url('https://cdn.jsdelivr.net/gh/toss/tossface/dist/tossface.css');

:root {
    --button-shadow: 5px 5px 10px rgba(209, 217, 230, 0.7), -5px -5px 10px var(--c-ltext);
}

@media (prefers-color-scheme: dark) {
    :root {
        --button-shadow: none;
    }
}

body {
    background-color: var(--c-bg);
    color: var(--c-text);
    font-family: "BR Cobane", 'Pretendard Variable', 'TossFace', sans-serif;
    text-align: center;
    user-select: none;
    -webkit-user-select: none;
    margin: 0;
    padding-top: 70px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgb(from var(--c-bg) r g b / 50%);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    padding: 10px 5px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1.5px solid var(--c-gray1);
    box-sizing: border-box;
    min-height: 60px;
}

.header-title-link {
    text-decoration: none;
    color: inherit;
    margin-left: 15px;
}

.header-title-link h1 {
    font-size: x-large;
    margin: 0;
    font-weight: 550;
    display: inline;
}

.header-links {
    display: flex;
    gap: 25px;
    margin-right: 15px;
}

.header-link {
    color: var(--c-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.header-link:hover {
    color: var(--c-blue-active);
    text-decoration: underline;
}

.header-link:visited {
    color: var(--c-text);
}

img {
    display: block;
    max-width: 100%;
    height: auto;
    margin-left: auto;
    margin-right: auto;
}

.button-container {
    margin-top: 25px;
}

.button {
    color: var(--c-ltext);
    border: none;
    cursor: pointer;
    box-shadow: var(--button-shadow);
    transition: transform 0.2s ease-out, background-color 0.3s ease, box-shadow 0.3s ease;
    display: inline-block;
    text-decoration: none;
}

.button:hover {
    transform: scale(1.05);
}

.button-large {
    padding: 14px 35px;
    border-radius: 28px;
    font-size: large;
    font-weight: 700;
}

.button-medium {
    padding: 9px 20px;
    border-radius: 20px;
    font-size: medium;
    font-weight: 600;
}

.button-access {
    background-color: var(--c-blue);
}

.button-access:hover {
    background-color: var(--c-blue-active);
}

.button-not-available {
    background-color: var(--c-gray3);
}

.button-not-available:hover {
    transform: none;
}

.button-main {
    background-color: var(--c-gray);
}

.button-main:hover {
    background-color: var(--c-grayl1);
}

.page-title-section {
    margin-top: 10vh;
    margin-bottom: 40vh;
}

.page-title {
    font-size: xxx-large;
    margin-top: 0em;
    margin-bottom: 0em;
    font-weight: 700;
    TossFace; /* <- ??? */
}

.page-subtitle {
    font-size: xx-large;
    margin-top: 0em;
    margin-bottom: 0;
    font-weight: 400;
}

.page-upper {
    font-size: x-large;
    margin-top: 0em;
    margin-bottom: 0;
    font-weight: 400;
}

.project-item {
    margin-bottom: 15vh;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 40px;
    box-sizing: border-box;
    text-align: center;
}

.project-item > .project-title {
    font-size: xx-large;
    margin-bottom: 0.2em;
    font-weight: 700;
    text-align: center;
}

.project-item > .project-subtitle {
    font-size: x-large;
    margin-top: 0.2em;
    margin-bottom: 0.2em;
    font-weight: 600;
    text-align: center;
}

.project-item > .project-description {
    font-size: large;
    margin-top: 0.5em;
    margin-bottom: 1.5em;
    color: var(--c-gray5);
    line-height: 1.5;
    text-align: center;
}

/* 프로젝트 페이지 전용 좌우 레이아웃 */
.project-item.layout-horizontal {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1400px;
    gap: 2rem;
    padding: 0 40px;
}

.project-item.layout-horizontal .project-image-container {
    flex: 1;
    max-width: 500px;
    display: flex;
    justify-content: center;
}

.project-item.layout-horizontal .project-details {
    flex: 1;
    text-align: center;
}

.project-item.layout-horizontal .project-title {
    font-size: xx-large;
    margin-bottom: 0.2em;
    font-weight: 700;
    text-align: center;
}

.project-item.layout-horizontal .project-subtitle {
    font-size: x-large;
    margin-top: 0.2em;
    margin-bottom: 0.2em;
    font-weight: 600;
    text-align: center;
}

.project-item.layout-horizontal .project-description {
    font-size: large;
    margin-top: 0.5em;
    margin-bottom: 1.5em;
    color: var(--c-gray5);
    line-height: 1.5;
    text-align: center;
}

/* 플레이스홀더 이미지 스타일 */
.placeholder-image {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--c-blue), var(--c-blue-active));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-ltext);
    font-size: x-large;
    font-weight: 600;
    box-shadow: var(--button-shadow);
}

footer {
    margin-top: 15vh;
    padding-bottom: 40px;
    font-size: small;
    color: var(--c-gray4);
}

footer p {
    margin-bottom: 0.5em;
}

footer .button-container {
    margin-top: 15px;
}

/* 새로 추가된 디자인 개요 전용 스타일 */
.design-section {
    margin-bottom: 12vh;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.design-section h2 {
    font-size: xx-large;
    margin-bottom: 1em;
    font-weight: 700;
    color: var(--c-text);
}

.philosophy-card {
    border-radius: 15px;
    padding: 3rem;
    margin-bottom: 3rem;
}

.philosophy-quote {
    font-size: x-large;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--c-text);
}

.philosophy-author {
    color: var(--c-gray5);
    font-size: large;
    margin-bottom: 2rem;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.principle-item {
    border: 1px solid var(--c-gray1);
    border-radius: 40px;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.principle-item:hover {
    transform: translateY(-5px);
}

.principle-item h3 {
    font-size: large;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--c-text);
}

.principle-item p {
    color: var(--c-gray5);
    font-size: medium;
}

.color-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.color-theme-card {
    background-color: var(--c-bg);
    border: 1px solid var(--c-gray1);
    border-radius: 40px;
    padding: 2rem;
}

.color-theme-card h3 {
    font-size: large;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--c-text);
}

.color-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 1rem;
    background-color: rgba(0, 122, 255, 0.05);
    border-radius: 8px;
}

.color-item span {
    width: 90px;
    flex-shrink: 0;
    text-align: left;
}

.color-box {
    margin-right: auto;
    width: 40px;
    height: 40px;
    border-radius: 4px;
    border: 1px solid var(--c-gray1);
}

.color-code {
    font-family: 'Courier New', monospace;
    font-size: small;
    color: var(--c-gray5);
}

.typography-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.font-card {
    border: 1px solid var(--c-gray1);
    border-radius: 40px;
    padding: 2rem;
}

.font-name {
    font-size: large;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--c-text);
}

.font-type {
    color: var(--c-gray5);
    font-size: medium;
    margin-bottom: 1.5rem;
}

.font-sample {
    background-color: rgba(0, 122, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1rem;
    font-size: large;
    line-height: 1.5;
}

.br-cobane {
    font-family: 'BR Cobane', Arial, sans-serif;
    font-weight: 600;
}

.pretendard {
    font-family: 'Pretendard Variable', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 500;
}

.year-badge {
    display: inline-block;
    background-color: var(--c-blue);
    color: var(--c-ltext);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: medium;
    font-weight: 600;
    margin-left: 1rem;
    box-shadow: var(--button-shadow);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background-color: var(--c-bg);
    border: 1px solid var(--c-gray1);
    border-radius: 10px;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: var(--button-shadow);
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-card h3 {
    font-size: large;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--c-text);
}

.project-card p {
    color: var(--c-gray5);
    margin-bottom: 1.5rem;
    font-size: medium;
}

.project-link {
    color: var(--c-blue);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: var(--c-blue-active);
    text-decoration: underline;
}

/* 반응형 */
@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
    
    header {
        min-height: 60px;
    }
    
    .header-title-link h1 {
        font-size: large;
    }
    
    .header-links {
        gap: 15px;
    }
    
    .header-link {
        font-size: small;
    }

    .page-title-section {
        margin-top: 8vh;
        margin-bottom: 12vh;
    }
    
    .page-title {
        font-size: xx-large;
    }
    
    .page-subtitle {
        font-size: large;
    }

    .project-item {
        padding: 0 20px;
        text-align: center;
    }

    .project-item.layout-horizontal {
        flex-direction: column;
        gap: 2rem;
        margin-bottom: 10vh;
        padding: 0 15px;
    }

    .project-item.layout-horizontal .project-image-container {
        width: 100%;
        max-width: none;
    }

    .project-item.layout-horizontal .project-details {
        text-align: center;
    }

    .project-item.layout-horizontal .project-title,
    .project-item.layout-horizontal .project-subtitle,
    .project-item.layout-horizontal .project-description {
        text-align: center;
    }

    .project-item.layout-horizontal .placeholder-image {
        aspect-ratio: 16/9;
        font-size: large;
        width: 100%;
    }

    .design-section {
        margin-bottom: 8vh;
        padding: 0 15px;
    }

    .design-section h2 {
        font-size: x-large;
    }

    .principles-grid,
    .stats-grid,
    .color-section,
    .typography-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-card {
        padding: 2rem;
    }

    .philosophy-quote {
        font-size: large;
    }

    .philosophy-author {
        font-size: medium;
    }
    
    .color-item span {
        width: 70px;
        display: inline-block;
        text-align: left;
    }
}

@media (max-width: 600px) {
    body {
        padding-top: 60px;
    }
    
    header {
        min-height: 60px;
    }
    
    .header-title-link h1 {
        font-size: large;
    }
    
    .header-links {
        gap: 15px;
    }
    
    .header-link {
        font-size: small;
    }

    .page-title-section {
        margin-top: 8vh;
        margin-bottom: 12vh;
    }
    
    .page-title {
        font-size: xx-large;
    }
    
    .page-subtitle {
        font-size: large;
    }

    .project-item {
        padding: 0 15px;
        text-align: center;
    }

    .design-section {
        margin-bottom: 8vh;
        padding: 0 15px;
    }

    .design-section h2 {
        font-size: x-large;
    }

    .principles-grid,
    .stats-grid,
    .color-section,
    .typography-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-card {
        padding: 2rem;
    }

    .philosophy-quote {
        font-size: large;
    }

    .philosophy-author {
        font-size: medium;
    }
    
    .color-item span {
        width: 70px;
        display: inline-block;
        text-align: left;
    }
}