/* ==========================================================================
   NEX Design System & Stylesheet
   ========================================================================== */

/* Variables */
:root {
    --bg-color: #08080a;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --accent-color: #ffffff;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.25);
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-mono: 'Plus Jakarta Sans', monospace;
    --spotlight-x: 50%;
    --spotlight-y: 50%;
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Dynamic Spotlight & Grid Background */
.spotlight {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    background: radial-gradient(
        circle 600px at var(--spotlight-x) var(--spotlight-y),
        rgba(255, 255, 255, 0.035) 0%,
        rgba(255, 255, 255, 0) 80%
    );
    transition: background 0.1s ease;
}

.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    background-size: 80px 80px;
    background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
}

/* Layout Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 30px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    cursor: pointer;
}

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

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-color);
    transition: width 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

.nav-link:hover {
    color: var(--text-primary);
}

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

/* Main Layout container */
.main-container {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 5;
}

.hero-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

/* Animated Typography */
.title-group {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    display: flex;
    align-items: baseline;
    justify-content: center;
    line-height: 0.9;
    margin-bottom: 20px;
}

.nex-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.design-container {
    display: inline-block;
    max-width: 0;
    opacity: 0;
    overflow: hidden;
    white-space: nowrap;
    margin-left: 0;
    transition: max-width 1.5s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 1.5s cubic-bezier(0.16, 1, 0.3, 1),
                margin-left 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.design-container.animate-active {
    max-width: 10ch;
    opacity: 1;
    margin-left: 20px;
}

/* Base class for animated words */
.word {
    opacity: 0;
    transform: translateY(30px);
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1), 
                opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1),
                letter-spacing 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Word specific styling */
.word.nex {
    font-size: clamp(4rem, 12vw, 9rem);
    font-weight: 800;
    letter-spacing: 0.25em;
    color: var(--text-primary);
    text-transform: uppercase;
}

.word.design {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 300;
    font-style: italic;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    transform: translateY(20px);
    display: inline-block;
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1), 
                opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Subtitle Animation */
.hero-subtitle {
    font-size: clamp(0.9rem, 2.5vw, 1.3rem);
    font-weight: 300;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-top: 15px;
    margin-left: 0.4rem; /* Optical alignment adjustment under N of NEX */
    height: 1.5rem;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.hero-subtitle .subtitle-static {
    display: inline-block;
    opacity: 0;
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-subtitle .subtitle-static.active {
    opacity: 1;
}

.hero-subtitle .subtitle-dynamic {
    display: inline-grid;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    justify-items: start;
    align-items: center;
    overflow: hidden;
    height: 100%;
}

.hero-subtitle .subtitle-word {
    grid-column: 1;
    grid-row: 1;
    opacity: 0;
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
}

/* Button Animation */
.button-container {
    opacity: 0;
    transform: translateY(20px);
    transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 1s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Animation States (Active triggers) */
.word.nex.animate-active {
    opacity: 1;
    transform: translateY(0);
    letter-spacing: 0.15em;
}

.design-container.animate-active .word.design {
    opacity: 1;
    transform: translateY(0);
}

.hero-subtitle .subtitle-word.active {
    opacity: 1;
}

.hero-subtitle .subtitle-word.exit {
    opacity: 0;
}

.button-container.animate-active {
    opacity: 1;
    transform: translateY(0);
}

/* Elegant Download Button */
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 14px 35px;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-primary);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color 0.4s ease, background-color 0.4s ease, box-shadow 0.4s ease, transform 0.2s ease;
}

.btn-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-download:hover {
    border-color: var(--border-hover);
    background-color: rgba(255, 255, 255, 0.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-download:hover .btn-arrow {
    transform: translate(3px, -3px);
}

.btn-download:active {
    transform: scale(0.98);
}

/* Footer layout */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    pointer-events: none;
    z-index: 10;
}

/* Modal - Glassmorphism design */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(6, 6, 8, 0.7);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
}

.modal-content {
    position: relative;
    background-color: rgba(15, 15, 20, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    width: 90%;
    max-width: 460px;
    padding: 40px;
    z-index: 102;
    transform: translateY(30px) scale(0.95);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 25px;
    right: 25px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.8rem;
    font-weight: 300;
    cursor: pointer;
    line-height: 0.5;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--accent-color);
}

.modal-title {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.modal-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 30px;
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.download-option-btn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background-color 0.3s, border-color 0.3s, transform 0.2s;
}

.download-option-btn:hover {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.download-option-btn:active {
    transform: translateY(0);
}

.file-size {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

/* Responsiveness adjustments */
@media (max-width: 768px) {
    .header {
        padding: 20px 30px;
    }
    
    .nav-links {
        display: none; /* simple mobile design */
    }

    .footer {
        padding: 20px 30px;
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .word.nex {
        letter-spacing: 0.15em;
    }
    
    .hero-title {
        flex-direction: column;
        align-items: center;
        gap: 5px;
    }
    
    .word.design {
        transform: translateY(0);
    }
}

/* --- NEXDESIGN GRID DOWNLOAD STYLES --- */
.modal-content.wide-modal {
    max-width: 960px;
    width: 95%;
    padding: 50px;
    background-color: rgba(9, 9, 11, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.6);
}

.modal-header {
    text-align: center;
    margin-bottom: 40px;
}

.modal-content.wide-modal .modal-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 40%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.modal-content.wide-modal .modal-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.5;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 20px;
}

.download-col {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.download-col:hover {
    background: rgba(255, 255, 255, 0.035);
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
}

.col-logo {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    margin-bottom: 20px;
    transition: color 0.3s ease, transform 0.3s ease;
}

.download-col:hover .col-logo {
    color: #ffffff;
    transform: scale(1.05);
}

.col-logo svg {
    width: 100%;
    height: 100%;
}

.col-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: #ffffff;
    letter-spacing: -0.01em;
}

.col-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.col-buttons {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: auto;
}

.download-action-btn {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    color: #ffffff;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.download-action-btn:hover {
    background: #ffffff;
    color: #000000;
    border-color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.12);
}

.download-action-btn:active {
    transform: translateY(0);
}

.file-info {
    font-size: 0.7rem;
    opacity: 0.55;
    margin-top: 3px;
    font-family: var(--font-sans);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.download-action-btn:hover .file-info {
    opacity: 0.75;
}

/* Responsiveness for grid */
@media (max-width: 900px) {
    .download-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .modal-content.wide-modal {
        padding: 30px 24px;
        max-height: 85vh;
        overflow-y: auto;
    }
    
    .download-col {
        padding: 24px 20px;
    }
    
    .col-subtitle {
        margin-bottom: 16px;
    }
}