/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #000;
    color: #fff;
    overflow-x: hidden;
}

/* ============================================
   ABOUT HERO SECTION
   ============================================ */
.about-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.about-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.about-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.8) 100%);
    z-index: 2;
}

.about-hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.about-hero-title {
    font-size: 7rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    text-transform: uppercase;
    line-height: 1;
}

.about-hero-subtitle {
    font-size: 1.8rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
    letter-spacing: 1px;
    margin-bottom: 2rem;
}

.about-hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    max-width: 800px;
    margin: 0 auto;
    font-weight: 300;
}

/* ============================================
   ABOUT TIMELINE SECTION
   ============================================ */
.about-timeline-section {
    background: #000;
    min-height: 100vh;
    position: relative;
    display: flex;
    overflow: hidden;
}

/* ============================================
   BACKGROUND IMAGE
   ============================================ */
.about-bg-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.about-bg-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.about-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2;
}

/* ============================================
   FIXED YEAR DISPLAY (LEFT SIDE)
   ============================================ */
.about-year-fixed {
    position: fixed;
    left: 0;
    top: 0;
    width: 45%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    background: transparent;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.about-year-fixed.visible {
    opacity: 1;
}

.about-year-text {
    font-size: 15rem;
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -8px;
    display: flex;
}

.about-year-prefix {
    color: #fff;
}

.about-year-changing {
    color: #fff;
    transition: all 0.4s ease;
    display: inline-block;
}

/* ============================================
   SCROLLING CONTENT AREA (RIGHT SIDE)
   ============================================ */
.about-content-area {
    margin-left: 45%;
    width: 55%;
    padding: 4rem 4rem 4rem 3rem;
    min-height: 100vh;
    position: relative;
    z-index: 10;
}

/* ============================================
   STORY ITEMS
   ============================================ */
.about-story-item {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    padding: 3rem 0;
    opacity: 0.3;
    transition: opacity 0.5s ease;
}

.about-story-item.active {
    opacity: 1;
}

.about-story-content {
    max-width: 600px;
}

.about-story-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.about-story-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
}

/* Story Image */
.about-story-image {
    width: 100%;
    max-width: 500px;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    background: #1a1a1a;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.about-story-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-story-item:hover .about-story-image img {
    transform: scale(1.05);
}

/* ============================================
   SOUND CONTROLS (TOP RIGHT)
   ============================================ */
.about-sound-control {
    position: fixed;
    top: 6rem;
    right: 2rem;
    display: flex;
    gap: 1rem;
    z-index: 100;
}

.about-pause-btn {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    color: #fff;
}

.about-pause-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.05);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1400px) {
    .about-hero-title {
        font-size: 6rem;
    }

    .about-hero-subtitle {
        font-size: 1.6rem;
    }

    .about-hero-description {
        font-size: 1rem;
    }

    .about-year-text {
        font-size: 12rem;
        letter-spacing: -6px;
    }

    .about-story-title {
        font-size: 2.2rem;
    }

    .about-story-description {
        font-size: 1rem;
    }
}

@media (max-width: 1024px) {
    .about-hero {
        min-height: 90vh;
    }

    .about-hero-title {
        font-size: 5rem;
    }

    .about-hero-subtitle {
        font-size: 1.4rem;
    }

    .about-hero-description {
        font-size: 0.95rem;
    }

    .about-year-fixed {
        width: 40%;
    }

    .about-content-area {
        margin-left: 40%;
        width: 60%;
        padding: 3rem 2rem;
    }

    .about-year-text {
        font-size: 10rem;
        letter-spacing: -5px;
    }

    .about-story-title {
        font-size: 2rem;
    }

    .about-story-description {
        font-size: 0.95rem;
    }

    .about-story-image {
        height: 350px;
    }
}

@media (max-width: 768px) {
    header {
        padding: 1rem 1.5rem;
    }

    nav {
        display: none;
    }

    .about-hero {
        min-height: 100vh;
    }

    .about-hero-content {
        padding: 2rem 1.5rem;
    }

    .about-hero-title {
        font-size: 3.5rem;
    }

    .about-hero-subtitle {
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
    }

    .about-hero-description {
        font-size: 0.9rem;
        line-height: 1.7;
    }

    .about-timeline-section {
        flex-direction: column;
    }

    .about-year-fixed {
        position: sticky;
        top: 80px;
        width: 100%;
        height: auto;
        padding: 1.5rem 0;
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        z-index: 50;
        left: 0;
        right: 0;
    }

    .about-year-fixed.visible {
        opacity: 1;
    }

    .about-year-text {
        font-size: 4rem;
        letter-spacing: -2px;
    }

    .about-content-area {
        margin-left: 0;
        width: 100%;
        padding: 2rem 1.5rem;
        position: relative;
        z-index: 10;
    }

    .about-story-item {
        min-height: 100vh;
        padding: 3rem 0;
        gap: 2rem;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .about-story-title {
        font-size: 1.8rem;
    }

    .about-story-description {
        font-size: 0.9rem;
        line-height: 1.7;
    }

    .about-story-image {
        max-width: 100%;
        height: 300px;
    }

    .about-sound-control {
        top: 5.5rem;
        right: 1.5rem;
    }

    .about-pause-btn {
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .about-hero-title {
        font-size: 3rem;
    }

    .about-hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .about-hero-description {
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .about-year-text {
        font-size: 4.5rem;
        letter-spacing: -2px;
    }

    .about-content-area {
        padding: 1.5rem 1rem;
    }

    .about-story-item {
        min-height: 100vh;
        padding: 2rem 0;
    }

    .about-story-title {
        font-size: 1.5rem;
    }

    .about-story-description {
        font-size: 0.85rem;
    }

    .about-story-image {
        height: 250px;
    }

    .about-sound-control {
        top: 5rem;
        right: 1rem;
        gap: 0.5rem;
    }

    .about-pause-btn {
        width: 40px;
        height: 40px;
    }

    .about-pause-btn svg {
        width: 20px;
        height: 20px;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: #0a0a0a;
    color: #fff;
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 10;
}

.footer-container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 3rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
}

.footer-logo-circle {
    width: 45px;
    height: 45px;
    border: 2px solid #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.85rem;
}

.footer-logo-text {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 1.5px;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-list li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.footer-list li a:hover {
    color: #fff;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: #fff;
}

.footer-divider {
    color: rgba(255, 255, 255, 0.3);
}