/* ===========================
   Variables y Reset
   =========================== */
:root {
    --color-bg: #0a0a0a;
    --color-text: #f2f2f2;
    --color-text-secondary: #aaaaaa;
    --color-accent: #ffffff;
    --color-hover: #1a1a1a;
    --font-primary: 'Suisse', 'Swiss 721', 'Helvetica Neue', 'Arial', sans-serif;
    --transition-speed: 0.3s;
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 86px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    letter-spacing: -0.02em;
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity var(--transition-speed) var(--transition-smooth);
}

a:hover {
    opacity: 0.7;
}

/* ===========================
   Layout
   =========================== */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
}

.container.header-container {
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container.header-container {
        padding: 0 20px;
    }
}

/* ===========================
   Header
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(10, 10, 10, 0.62);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 18px;
    padding-bottom: 18px;
}

.logo {
    font-size: 56px;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: lowercase;
    line-height: 1;
    position: relative;
    display: inline-flex;
    align-items: flex-end;
}

.logo::after {
    content: 'project';
    margin-left: 1px;
    margin-bottom: 7px;
    font-size: 0.16em;
    font-weight: 600;
    letter-spacing: 0.05em;
    opacity: 0.9;
    text-transform: lowercase;
}

.nav {
    display: flex;
    gap: 22px;
    min-width: 0;
    justify-content: flex-end;
}

.nav-link {
    font-family: var(--font-primary);
    font-size: 26px;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-transform: lowercase;
    position: relative;
    transition: opacity 0.25s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover {
    opacity: 0.65;
}

.nav-link:hover::after {
    width: 100%;
}

@media (max-width: 768px) {
    .logo {
        font-size: 42px;
    }

    .logo::after {
        margin-left: 1px;
        margin-bottom: 5px;
        font-size: 0.15em;
    }

    .nav {
        gap: 14px;
    }
    
    .nav-link {
        font-size: 20px;
    }
}

/* ===========================
   Main Content
   =========================== */
.main {
    position: relative;
    padding-top: var(--header-height);
    padding-bottom: 70px;
    min-height: 100vh;
}

/* ===========================
   Hero
   =========================== */
.hero {
    position: relative;
    height: clamp(200px, 34vh, 340px);
    overflow: hidden;
    margin-bottom: 0;
}

.hero-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    filter: saturate(0.88) contrast(0.95) brightness(0.56);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.18), rgba(10, 10, 10, 0.62));
}

.hero-content {
    position: absolute;
    inset: auto 0 12px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hero-kicker {
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

.hero-arrow {
    font-size: 38px;
    line-height: 1;
    color: var(--color-text);
    opacity: 0.85;
}

/* ===========================
   Projects Mosaic
   =========================== */
.projects-mosaic {
    position: relative;
    width: 100%;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

.project-card {
    position: relative;
    aspect-ratio: auto;
    height: calc(100vh - var(--header-height));
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.02);
    cursor: pointer;
    content-visibility: auto;
    contain-intrinsic-size: 1000px 560px;
}

.project-card-large {
    grid-column: auto;
}

.project-card-video {
    aspect-ratio: auto;
    height: calc(100vh - var(--header-height));
    min-height: 420px;
    background: #000;
}

.project-card.video-fallback .project-preview-video {
    opacity: 0;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s var(--transition-smooth), opacity 0.28s var(--transition-smooth);
}

.project-card:hover .project-image {
    transform: scale(1.025);
}

.project-preview-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.6s var(--transition-smooth), opacity 0.28s var(--transition-smooth);
    background: var(--color-hover);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

.project-preview-video::-webkit-media-controls,
.project-preview-video::-webkit-media-controls-enclosure,
.project-preview-video::-webkit-media-controls-start-playback-button {
    display: none !important;
    -webkit-appearance: none;
}

@supports (-webkit-touch-callout: none) {
    .project-card,
    .project-card-large,
    .project-card-video {
        content-visibility: visible;
        contain-intrinsic-size: auto;
    }
}

.project-card:hover .project-preview-video {
    transform: scale(1.025);
}

.project-card .project-image,
.project-card .project-preview-video {
    pointer-events: none;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.72) 0%, rgba(0, 0, 0, 0) 62%);
    display: flex;
    align-items: flex-end;
    padding: 28px 24px;
}

.project-title {
    font-size: clamp(20px, 2.5vw, 34px);
    font-weight: 600;
    letter-spacing: -0.02em;
    text-transform: lowercase;
}

/* ===========================
   Footer
   =========================== */
.footer {
    padding: 22px 20px 28px;
    text-align: center;
}

.footer p,
.footer a {
    font-size: 11px;
    color: var(--color-text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.footer a:hover {
    color: var(--color-text);
    opacity: 1;
}

@media (max-width: 768px) {
    :root {
        --header-height: 126px;
    }

    .container.header-container {
        padding: 0 16px;
    }

    .header .container {
        display: grid;
        grid-template-columns: 1fr;
        justify-items: start;
        row-gap: 8px;
        padding-top: 12px;
        padding-bottom: 12px;
    }

    .header {
        backdrop-filter: none;
        background-color: rgba(10, 10, 10, 0.94);
    }

    .logo {
        font-size: clamp(34px, 9vw, 42px);
        line-height: 1;
    }

    .nav {
        width: 100%;
        min-width: 0;
        justify-content: flex-end;
        flex-wrap: wrap;
        gap: 12px;
    }

    .nav-link {
        font-size: 16px;
        letter-spacing: 0.03em;
    }

    .hero {
        height: clamp(160px, 26vh, 240px);
    }

    .projects-mosaic {
        width: 100%;
        margin: 0;
        grid-template-columns: 1fr;
    }

    .project-card,
    .project-card-large {
        aspect-ratio: auto;
    }

    .project-card-video {
        aspect-ratio: auto;
        height: calc(100vh - var(--header-height));
        min-height: 260px;
    }

    .project-overlay {
        padding: 18px 16px;
    }

    .project-title {
        font-size: clamp(17px, 7vw, 26px);
    }
}

@media (max-width: 420px) {
    :root {
        --header-height: 114px;
    }

    .header .container {
        row-gap: 6px;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .logo {
        font-size: 32px;
    }

    .logo::after {
        margin-left: 2px;
        margin-bottom: 5px;
        font-size: 0.19em;
    }

    .nav {
        gap: 8px;
    }

    .nav-link {
        font-size: 14px;
    }
}

/* ===========================
   Custom Scrollbar
   =========================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}