/* --- Variables & Reset (Swiss Minimalist Theme) --- */
:root {
    /* Deep Black Background */
    --bg-color: #050505;       
    --text-main: #ffffff;      
    --text-muted: #888888;     
    
    /* Electric Blue Accent */
    --accent: #3b2eff;         
    
    --card-bg: transparent;    
    --border-color: rgba(255, 255, 255, 0.15); 

    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    
    --max-width: 1400px; 
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased; 
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }

/* --- Utility --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 4vw; 
}

/* --- HEADER --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 2rem 0;
    transition: padding 0.3s ease, background 0.3s ease;
}

.header.scrolled {
    padding: 1rem 0;
    background: rgba(5, 5, 5, 0.85); 
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* --- LOGO --- */
.logo {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    font-size: 2.2rem; 
    font-weight: 500; 
    text-transform: uppercase;
    line-height: 0.85; 
    letter-spacing: -0.02em;
    color: var(--text-main);
    z-index: 1001;
}

.logo .logo-top { color: var(--text-main); }
.logo .outline-text { color: transparent; -webkit-text-stroke: 1px var(--text-main); }

/* Nav Links */
.nav-menu {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-links { display: flex; gap: 3rem; }

.nav-link {
    font-size: 0.9rem;
    font-weight: 400; 
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.6;
}
.nav-link:hover { opacity: 1; color: var(--accent); }

/* Header Button */
.header-btn {
    padding: 0.8rem 1.8rem;
    background: var(--text-main); 
    color: #000; 
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 500; 
}

.header-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.bar { width: 24px; height: 2px; background: var(--text-main); }

/* --- HERO SECTION --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-title-lusion {
    font-size: 9vw; 
    line-height: 1; 
    font-weight: 300; 
    margin-bottom: 3rem;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

.line-wrapper {
    display: block;
    position: relative;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to right, black 85%, transparent 100%);
    mask-image: linear-gradient(to right, black 85%, transparent 100%);
    padding-right: 0.2em; 
}

.line-text {
    display: block;
    transform: translateX(110%); 
    opacity: 0;
    transition: transform 1.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 1.5s ease;
    will-change: transform;
}

.line-wrapper.in-view .line-text { transform: translateX(0); opacity: 1; }

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 550px; 
    margin-bottom: 2.5rem;
    font-weight: 300; 
}

.hero-btns { display: flex; gap: 1.5rem; align-items: center; }

.btn-link {
    font-size: 1rem;
    font-weight: 500;
    border-bottom: 1px solid var(--text-main);
    padding-bottom: 5px;
}
.btn-link:hover { color: var(--accent); border-color: var(--accent); }

/* HERO CTA BUTTON */
.hero-cta-button {
    display: inline-block;
    padding: 14px 34px;
    background-color: var(--text-main); /* Solid White */
    color: var(--bg-color); /* Black Text */
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 600;
    text-transform: capitalize; 
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 5px 15px rgba(255,255,255,0.1); 
}

.hero-cta-button:hover {
    background-color: var(--accent); /* Electric Blue on Hover */
    color: #ffffff; /* White Text */
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(59, 46, 255, 0.3); /* Stronger Blue Glow */
}

/* --- FEATURE SECTION --- */
.section { padding: 10rem 0; }

.overline {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    display: block;
    margin-bottom: 1rem;
}

.feature-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.feature-image {
    width: 100%;
    height: 70vh;
    overflow: hidden;
    position: relative;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.1); 
    transition: transform 1.5s ease;
}

.feature-content { padding-right: 2rem; }

.feature-title {
    font-size: 5vw; 
    font-weight: 300;
    line-height: 1.2; 
    margin-bottom: 2.5rem;
    letter-spacing: -0.03em;
}

.feature-content .line-wrapper {
    padding-bottom: 0.2em; /* Anti-clip padding */
}

.feature-text {
    font-size: 1.25rem;
    color: var(--text-muted);
    line-height: 1.6;
    font-weight: 300;
    margin-bottom: 3rem;
    max-width: 500px;
}

/* --- PORTFOLIO --- */
.section-header { margin-bottom: 5rem; border-top: 1px solid var(--border-color); padding-top: 2rem; }
.section-header h2 { font-size: 4rem; font-weight: 300; letter-spacing: -0.03em; }

.work-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
}

.work-item {
    height: 60vh; 
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}
.work-item.small { height: 40vh; }

.work-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.6);
    opacity: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: var(--transition);
    color: #fff;
    backdrop-filter: blur(5px);
}
.work-item:hover .work-overlay { opacity: 1; }
.work-overlay h3 { font-size: 2rem; font-weight: 300; }
.work-overlay p { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.8rem; margin-top: 10px; }

/* --- MARQUEE --- */
.marquee-section {
    position: relative;
    width: 100%;
    overflow: hidden;
    background-color: var(--bg-color); 
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0; 
    margin: 0;
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 15%, black 85%, transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 15%, black 85%, transparent 100%);
    user-select: none;
    cursor: default;
}

.marquee-content {
    display: flex;
    gap: 4rem; 
    width: max-content; 
    font-family: var(--font-main);
    font-size: 2.5rem; 
    font-weight: 400; 
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted); 
    animation: marquee-scroll 60s linear infinite;
    will-change: transform;
    transition: color 0.3s ease, opacity 0.3s ease;
}

.marquee-content span { color: var(--accent); opacity: 0.7; margin: 0 1rem; }
.marquee-section:hover .marquee-content { animation-play-state: paused; color: var(--text-main); opacity: 1; }

@keyframes marquee-scroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ========================================= */
/* PREMIUM TYPEFORM-STYLE CONTACT SECTION    */
/* ========================================= */

.contact-section {
    background: #ffffff;
    color: #000000;
    margin-top: 4rem;
    padding-bottom: 10rem;
}

/* Updated Layout: Centered & Balanced */
.contact-wrapper {
    max-width: 900px; /* Wider central column */
    margin: 0 auto;
    padding-top: 6rem;
    display: flex;
    justify-content: center;
}

/* Form Area */
.contact-interaction-col {
    position: relative;
    width: 100%;
    min-height: 400px; /* Prevent layout jump */
}

.form-step {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    visibility: hidden;
}

.form-step.active-step {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    visibility: visible;
}

.form-step.exited-step {
    opacity: 0;
    transform: translateY(-30px);
}

/* Question & Input */
.form-question {
    font-size: 3.5rem; 
    font-weight: 400;
    line-height: 1.1;
    color: #000;
    margin-bottom: 2.5rem; 
    letter-spacing: -0.02em;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
    border-bottom: 2px solid rgba(0,0,0,0.1);
    transition: border-color 0.3s ease;
}

.input-group:focus-within {
    border-bottom-color: var(--accent);
}

.input-group input, 
.input-group textarea {
    width: 100%;
    border: none;
    background: transparent;
    font-family: var(--font-main);
    font-size: 2.5rem; 
    color: var(--accent); 
    outline: none;
    padding: 1rem 0;
    line-height: 1.2;
    resize: none;
    /* IMPORTANT FIX: No transition on height or font-size to prevent looping */
    overflow: hidden; 
}

.input-group input::placeholder, 
.input-group textarea::placeholder {
    color: rgba(0,0,0,0.2); 
}

/* Stylized Floating Scrollbar for Textarea */
.input-group textarea::-webkit-scrollbar {
    width: 8px;
}
.input-group textarea::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.05); 
    border-radius: 4px;
}
.input-group textarea::-webkit-scrollbar-thumb {
    background-color: var(--accent);
    border-radius: 4px;
    border: 2px solid #fff; /* Padding effect */
}

/* Button Styling */
.arrow-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: #000;
    padding: 0 1rem;
    transition: transform 0.3s ease, color 0.3s ease;
}

.arrow-btn:hover {
    color: var(--accent);
    transform: translateX(5px);
}

.text-send-btn {
    font-size: 1.5rem;
    background: none;
    border: none;
    border-bottom: 2px solid #000;
    cursor: pointer;
    padding-bottom: 5px;
    margin-top: 2rem;
    font-weight: 500;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.text-send-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* Column Mode for Textarea Step */
.input-group.column-mode {
    flex-direction: column;
    align-items: flex-start;
    border-bottom: none;
}
.input-group.column-mode textarea {
    border-bottom: 2px solid rgba(0,0,0,0.1);
    min-height: 80px; /* Starting height */
}
.input-group.column-mode textarea:focus {
    border-bottom-color: var(--accent);
}

/* Success State Text */
.success-subtext {
    font-size: 1.5rem;
    color: var(--text-muted);
}

/* Validation Error */
.input-error {
    color: #ff3b30;
    font-size: 0.9rem;
    margin-top: 0.8rem;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
}
.input-error.visible { opacity: 1; transform: translateY(0); }

/* --- FOOTER (INVERTED) --- */
footer { padding: 3rem 0; border-top: 1px solid rgba(0,0,0,0.1); background: #ffffff; color: #000000; }
.footer-col a.logo .logo-top { color: #000; }
.footer-col a.logo .outline-text { color: transparent; -webkit-text-stroke: 1px #000; }
.footer-col p, .footer-col a { color: #555; }
.footer-col a:hover { color: #000; }

/* --- MOBILE --- */
@media (max-width: 900px) {
    .nav-menu { display: none; }
    .hamburger { display: flex; }
    .hero-title-lusion { font-size: 13vw; }
    .marquee-content { font-size: 1.2rem; gap: 2rem; }
    
    /* Feature Section Mobile */
    .feature-layout { grid-template-columns: 1fr; gap: 3rem; }
    .feature-image { height: 40vh; order: -1; }
    .feature-title { font-size: 12vw; }
    
    .work-grid { grid-template-columns: 1fr; }
    
    /* Contact Mobile */
    .contact-wrapper {
        padding: 4rem 4vw;
        display: block;
    }
    .form-question {
        font-size: 2.5rem;
    }
    .input-group input, 
    .input-group textarea {
        font-size: 1.8rem;
    }
}

/* Animations */
.fade-up { opacity: 0; transform: translateY(40px); transition: 0.8s ease-out; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-in { opacity: 0; animation: fadeIn 1s forwards; }
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
@keyframes fadeIn { to { opacity: 1; } }