@import url('https://fonts.googleapis.com/css2?family=Grenze+Gotisch:wght@900&display=swap');

:root {
    --primary-color: #f0f4f5;
    --accent-color: #64b5f6;
    --accent-hover: #42a5f5;
    --background-dark: #151f21;
    --background-card: rgba(255, 255, 255, 0.05);
    --border-color: rgba(240, 244, 245, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --transition-speed: 0.3s;

    --font-size: 0.9rem;
    --subject-font-size: 1.6rem;
    --bar-elements-font-size: 1.3rem;
}

* {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-repeat: no-repeat;
    background-size: 100%;
    background-color: var(--background-dark);
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

a:visited {
    text-decoration: none;
}

/* Header */
header {
    text-align: center;
    padding: 0rem 0rem 0rem;
    background: linear-gradient(135deg, rgba(100, 181, 246, 0.15), rgba(66, 165, 245, 0.08)),
                url('./img/background_img/background2.jpg') no-repeat center center;
    background-size: cover;
    background-position: center;
    max-height: 40vh;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* border-bottom: 2px solid var(--border-color); */
}

.header-content {
    max-width: 800px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.main-title {
    font-family: 'Grenze Gotisch', cursive;
    font-size: 4rem;
    color: var(--primary-color);
    margin: 0;
    text-shadow: 2px 2px 6px var(--shadow-color);
    letter-spacing: 3px;
    line-height: 1.2;
}

.subtitle {
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1.5rem;
    color: var(--accent-color);
    margin: 0;
    font-weight: 300;
    letter-spacing: 6px;
    text-transform: uppercase;
    padding-top: 0.5rem;
}

@media all and (max-width: 768px) {
    header {
        padding: 0;
        min-height: 150px;
    }

    .main-title {
        font-size: 2.5rem;
        letter-spacing: 2px;
    }

    .subtitle {
        font-size: 1.1rem;
        letter-spacing: 4px;
    }

    .profile-image {
        width: 140px;
        height: 140px;
    }
}

/* Nav */
nav {
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 0;
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.4));
    z-index: 100;
    backdrop-filter: blur(10px);
}

@media all and (max-width: 768px) {
    nav {
        display: none;
    }
}

.nav-element {
    font-family: 'Grenze Gotisch', cursive;
    font-size: 1.6rem;
    text-align: center;
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    transition: all var(--transition-speed) ease;
    position: relative;
}

.nav-element:hover {
    background-color: var(--background-card);
    color: var(--accent-color);
    transform: translateY(-2px);
}

.nav-element::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: all var(--transition-speed) ease;
    transform: translateX(-50%);
}

.nav-element:hover::after {
    width: 80%;
}

/* Contents */
#contents {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Category Sections */
.category {
    margin: 2rem 0;
    padding: 1.2rem;
    background: var(--background-card);
    border-radius: 14px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-color);
    backdrop-filter: blur(10px);
}

.category:first-child {
    margin-top: 1.5rem;
}

.category-header {
    margin-bottom: 1.2rem;
    padding-bottom: 0.8rem;
    border-bottom: 2px solid var(--border-color);
}

.subject {
    font-family: 'Grenze Gotisch', cursive;
    font-size: var(--subject-font-size);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    color: var(--primary-color);
    text-shadow: 2px 2px 4px var(--shadow-color);
}

.subject-icon {
    font-size: calc(var(--subject-font-size) * 0.7);
    filter: drop-shadow(2px 2px 4px var(--shadow-color));
}

.detail {
    text-align: center;
    line-height: 1.5;
}

/* About Me Section */
.intro-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
}

.profile-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-color);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.intro-card p {
    margin: 0.5rem 0;
    line-height: 1.5;
}

.intro-highlight {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

/* Career Timeline */
.career-timeline {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.career-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1rem;
    padding: 1.2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border-left: 3px solid var(--accent-color);
    transition: all var(--transition-speed) ease;
    align-items: center;
}

.career-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.career-period {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    text-align: center;
    padding: 0.6rem;
    background: rgba(100, 181, 246, 0.1);
    border-radius: 6px;
    border: 1px solid rgba(100, 181, 246, 0.3);
    white-space: nowrap;
}

.career-content {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.career-dot {
    width: 10px;
    height: 10px;
    background-color: var(--accent-color);
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 6px var(--accent-color);
}

.career-text {
    font-size: 0.9rem;
    text-align: left;
    line-height: 1.4;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
    padding: 1rem 0;
}

.project-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    transition: all var(--transition-speed) ease;
    cursor: default;
}

.project-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-color);
    border-color: var(--accent-color);
    cursor: pointer;
}

.project-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.6rem;
}

.project-icon {
    font-size: 1.8rem;
    filter: drop-shadow(2px 2px 4px var(--shadow-color));
    flex-shrink: 0;
}

.project-title {
    font-size: 0.95rem;
    font-weight: 600;
    text-align: left;
    line-height: 1.3;
}

.project-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project-period {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-color);
    background: rgba(100, 181, 246, 0.1);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    text-align: left;
    align-self: flex-start;
    border: 1px solid rgba(100, 181, 246, 0.2);
}

.project-description {
    font-size: 0.85rem;
    color: var(--primary-color);
    opacity: 0.9;
    line-height: 1.4;
    text-align: left;
}

.project-domain {
    font-size: 0.8rem;
    color: rgba(240, 244, 245, 0.7);
    font-style: italic;
    text-align: left;
}

.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
    color: var(--primary-color);
    font-style: italic;
    opacity: 0.7;
}

.error {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(255, 107, 107, 0.3);
}

/* Contact Info */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    max-width: 500px;
    margin: 0 auto 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.6rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    transition: all var(--transition-speed) ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.contact-label {
    font-size: 1rem;
}

.contact-value {
    font-size: 0.85rem;
    color: var(--primary-color);
}

/* Blog Link */
.daeunworld {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.2rem;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: white;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    margin: 1.5rem 0;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 4px 15px rgba(100, 181, 246, 0.4);
}

.daeunworld:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(100, 181, 246, 0.6);
    filter: brightness(1.1);
}

.blog-icon {
    font-size: 1rem;
}

/* SNS */
.sns {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.2rem;
    padding: 1.2rem 0 1rem 0;
}

.sns_link {
    padding: 0.4rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    transition: all var(--transition-speed) ease;
    border: 1px solid transparent;
}

.sns_link:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.sns_link img {
    width: 2rem;
    height: 2rem;
    object-fit: contain;
}

/* Footer */
footer {
    margin: 4rem 2rem 2rem;
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-top: 1px solid var(--border-color);
    border-radius: 8px 8px 0 0;
}

footer p {
    color: rgba(240, 244, 245, 0.7);
    font-size: 0.9rem;
}

/* Responsive */
@media all and (max-width: 480px) {
    header {
        min-height: 120px;
    }

    .main-title {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }

    .subject {
        font-size: 1.5rem;
    }

    .profile-image {
        width: 120px;
        height: 120px;
    }

    .category {
        padding: 1.2rem 0.8rem;
        margin: 2rem 0;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .career-item {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .career-period {
        text-align: center;
        width: 100%;
    }

    .career-content {
        justify-content: center;
    }

    .career-text {
        text-align: center;
    }

    .daeunworld {
        font-size: 1rem;
        padding: 0.8rem 1.5rem;
    }
}