html, body {
    overflow-x: hidden;
}

body.no-scroll {
    overflow: hidden;
    height: 100vh;
}

h1 {
    font-weight: bold;
}

.main-content-wrapper {
     display: flex;
    flex-direction: column;
    margin-bottom: clamp(2rem, calc(8rem - 6vw), 50rem);
}

/* Onboarding Guide */
#guide-overlay {
    position: fixed;
    z-index: 20000;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: auto;
}

.guide-bg {
    position: absolute;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(30, 30, 30, 0.25);
    z-index: 0;
    pointer-events: none;
}

.guide-tooltip {
    position: absolute;
    z-index: 2;
    background: var(--background-card);
    color: var(--text-primary-color);
    padding: 1em 1.5em;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    font-size: 0.9rem;
    font-weight: 500;
    pointer-events: none;
    opacity: 1;
    max-width: 300px;
    white-space: pre-line;
    transition: left 0.5s, top 0.5s, opacity 0.2s;
}

.guide-close {
    position: absolute;
    right: 4vw;
    bottom: 6vw;
    z-index: 3;
    background: #fff;
    color: #111;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    padding: 0.5em 1.2em;
    cursor: var(--cursor-grab2);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.guide-underline {
    position: relative;
}

.guide-underline::after {
    content: "";
    position: absolute;
    left: 0;
    right: calc(var(--underline-extra, 0px) * -1);
    bottom: -5px;
    height: 4px;
    background: var(--yellow-highlight-light);
    border-radius: 2px;
    opacity: 0.7;
    z-index: 12001;
    animation: underlinePulse 1.2s infinite alternate;
    transition: right 0.3s;
}

@keyframes underlinePulse {
    0% { opacity: 0.7; transform: scaleX(1); }
    100% { opacity: 0.3; transform: scaleX(1.05); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    left: 50%;
    bottom: 1.5rem;
    transform: translateX(-50%);
    font-size: 3rem;
    animation: bounce 1.2s infinite;
    z-index: 2;
    color: var(--text-secondary-color);
    opacity: 0.8;
    pointer-events: auto;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0) translateX(-50%); }
    50% { transform: translateY(-8px) translateX(-50%); }
}

.scroll-icon {
    display: inline-block;
    font-size: 2rem;
    cursor: var(--cursor-grab2);
    transition: transform 0.15s;
}

.scroll-icon:hover {
    transform: scale(1.1) rotate(-4deg);
}

/* Projects Area */
.projects {
    margin-top: 3rem;
}

.project {
    display: flex;
    align-items: flex-start;
    min-height: 50vh;
    padding: 4rem 0;
    position: relative;
    transition: background-color 0.8s ease-in-out;
    width: 100vw;
    padding-left: var(--main-left-gap);
    box-sizing: border-box;
    background-color: transparent;
    background-image: none;
    z-index: 0;
}

.project.active {
    background-color: var(--background-secondary);
    position: relative;
    z-index: 0;
}

.project::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../hanji.png');
    background-size: cover;
    background-repeat: repeat;
    opacity: 0;
    mix-blend-mode: multiply;
    z-index: -1;
    pointer-events: none;
    transition: opacity 1.2s ease-in-out;
}

.project.active::before {
    opacity: 0.3;
}

.project-info {
    width: 25vw;
    max-width: 300px;
    position: fixed;
    top: 150px;
    left: var(--main-left-gap);
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.4s cubic-bezier(.77,0,.175,1), transform 0.4s cubic-bezier(.77,0,.175,1);
    pointer-events: none;
    z-index: 120;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    color: var(--text-primary-color);
}

.project-info.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.view-project-overlay.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.project-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary-color);
    line-height: 1;
    margin-bottom: 0.2em;
    letter-spacing: -0.03em;
}

.project-title {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 0.15em;
    letter-spacing: -0.01em;
    color: var(--text-primary-color);
}

.project-meta {
    display: flex;
    flex-direction: column;
    gap: 0.2em;
}

.project-date {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    font-weight: 400;
}

.project-tools {
    font-size: 0.85rem;
    color: var(--text-tertiary-color);
    font-weight: 400;
}

.project-image {
    display: block;
    width: 60vw;
    max-width: 1100px;
    margin-left: auto;
    margin-right: calc(var(--main-left-gap));
    position: relative;
}

.project-image img {
    width: 120%;
    display: block;
    transition: filter 0.4s ease, transform 0.4s ease, opacity 0.3s ease;
    margin-left: auto;
    filter: grayscale(100%);
}

.project-image.grayscale img {
    filter: grayscale(100%);
}

.project-image:hover img {
    filter: grayscale(0%) !important;
    transform: scale(1.015);
    cursor: var(--cursor-grab2);
}

.view-project-overlay {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background-color: var(--background-secondary);
    color: var(--text-primary-color);
    padding: 0.5em 0.9em;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background-color 0.3s ease, color 0.3s ease;
    pointer-events: none;
    z-index: 10;
}

.project.active .project-image .view-project-overlay {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.project-image.hidden-on-modal img {
    opacity: 0;
    pointer-events: none;
}

.section-bottom-gap {
    height: 4rem;
}

/* Marquee Section */
.marquee-section {
    width: 100%;
    margin: 6rem 0 8rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.marquee-container {
    position: relative;
    height: 100%;
    width: 100%;
    max-width: 1300px;
    overflow: hidden;
    margin: 0;
    font-family: 'Nunito Sans', sans-serif;
}

.marquee-inner {
    display: flex;
    white-space: nowrap;
    animation: marquee-scroll 25s linear infinite;
}

.marquee-inner.right-to-left {
    animation-direction: reverse;
}

.marquee-inner.paused {
    animation-play-state: paused;
}

.marquee-item-wrapper {
    display: flex;
    gap: 12px;
    padding-right: 10px;
}

.marquee-item {
    font-family: 'Nunito Sans', sans-serif;
    font-size: 14px;
    font-weight: 400;
    max-width: 60ch;
    font-style: normal;
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid currentColor;
    flex-shrink: 0;
    transition: background-color 0.3s, color 0.3s;
    opacity: 0.15;
}

.marquee-item, p {
    margin-top: 8px;
    margin-bottom: 8px;
}

.marquee-item:hover {
    background-color: var(--text-primary-color);
    color: var(--text-inverted-color);
    opacity: 0.7;
}

.marquee-primary-color {
    color: var(--text-primary-color);
}

.marquee-secondary-color {
    color: var(--text-secondary-color);
}

/* (선택 사항) 호버 시에는 완전히 불투명하게 만듭니다. */
body[data-theme="dark"] .marquee-item:hover {
    opacity: 1;
    color: #111;

}

.fade-overlay {
    position: absolute;
    top: 0;
    z-index: 10;
    height: 100%;
    width: 15vw;
    pointer-events: none;
}

.fade-left {
    left: 0;
    background: linear-gradient(to right, var(--current-bg), transparent);
}

.fade-right {
    right: 0;
    left: unset;
    background: linear-gradient(to left, var(--current-bg), transparent);
}

@keyframes marquee-scroll {
    0% {
        transform: translateX(0%);
    }
    100% {
        transform: translateX(-100%);
    }
}
@keyframes marquee-scroll-rtl-fast {
    0% { transform: translateX(0%); }
    100% { transform: translateX(-100%); }
}

@keyframes marquee-scroll-ltr-medium {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(0%); }
}

@keyframes marquee-scroll-rtl-slow {
    0% { transform: translateX(0%); }
    100% { transform: translateX(-100%); }
}

@keyframes marquee-scroll-ltr-v_slow {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(0%); }
}

/* ==========================================================================
   PORTFOLIO FIXED HEADER STYLES
   ========================================================================== */

.portfolio-header {
    position: fixed;
    top: 10px;
    z-index: 999;
    width: 100%;
    background-color: transparent;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
}

.portfolio-header.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-100%);
}

.portfolio-header:not(.hidden) {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.portfolio-header .portfolio-header-inner {
    margin: 0 auto;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 1rem;
}

/* Corrected theme-toggle style to match connect page */
.portfolio-header .theme-toggle-button {
    padding: 0.5rem;
    border: none;
    background: none;
    cursor: pointer;
    position: relative;
    width: 2rem;  /* 32px */
    height: 2rem; /* 32px */
    transition: opacity 0.3s;
    margin-top: 0.5rem;
    margin-right: 1rem;
    scale: 1.2;
}

.portfolio-header .theme-toggle-button:hover {
    opacity: 0.7;
}

.portfolio-header .theme-icon {
    width: 1.25rem; /* 20px */
    height: 1.25rem; /* 20px */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: transform 0.3s, opacity 0.3s;
}

.portfolio-header .theme-icon.hidden {
    transform: translate(-50%, -50%) rotate(-90deg);
    opacity: 0;
}

/* Light Theme: Only icon stroke color changes */
body[data-theme="light"] .portfolio-header .theme-icon {
    stroke: #333;
}

/* Dark Theme: Only icon stroke color changes */
body[data-theme="dark"] .portfolio-header .theme-icon {
    stroke: #eee;
}