:root{--primary:#16a34a;--primary-dark:#15803d;--bg:#0f172a;--surface:#1e293b;--surface2:#334155;--text:#f8fafc;--text2:#94a3b8;--accent:#22c55e;--radius:12px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--accent);text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* Nav */
nav{background:var(--surface);border-bottom:1px solid var(--surface2);padding:16px 0;position:sticky;top:0;z-index:100}
nav .container{display:flex;justify-content:space-between;align-items:center}
.logo{font-size:1.4rem;font-weight:800;color:var(--text)}
.logo span{color:var(--accent)}
nav .links{display:flex;gap:16px;align-items:center}
nav .links a{color:var(--text2);font-size:.9rem;transition:.2s}
nav .links a:hover{color:var(--text)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;border-radius:var(--radius);font-weight:600;font-size:.9rem;border:none;cursor:pointer;transition:.2s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:var(--surface2);color:var(--text)}
.btn-secondary:hover{background:#475569}
.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}
.btn-sm{padding:6px 16px;font-size:.8rem}

/* Hero */
.hero{text-align:center;padding:80px 0 60px}
.hero h1{font-size:3rem;font-weight:800;line-height:1.1;margin-bottom:16px}
.hero h1 .green{color:var(--accent)}
.hero p{font-size:1.2rem;color:var(--text2);max-width:600px;margin:0 auto 32px}

/* Features */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;padding:40px 0}
.feature-card{background:var(--surface);border-radius:var(--radius);padding:32px 24px;text-align:center}
.feature-card .icon{font-size:2.5rem;margin-bottom:16px}
.feature-card h3{margin-bottom:8px;font-size:1.1rem}
.feature-card p{color:var(--text2);font-size:.9rem}

/* Pricing */
.pricing{padding:60px 0;text-align:center}
.pricing h2{font-size:2rem;margin-bottom:40px}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;max-width:900px;margin:0 auto}
.price-card{background:var(--surface);border-radius:var(--radius);padding:40px 32px;position:relative}
.price-card.popular{border:2px solid var(--accent)}
.price-card.popular::before{content:'MOST POPULAR';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--accent);color:#000;font-size:.7rem;font-weight:700;padding:4px 16px;border-radius:20px}
.price-card h3{font-size:1.2rem;margin-bottom:8px}
.price-card .price{font-size:2.5rem;font-weight:800;margin:16px 0}
.price-card .price span{font-size:1rem;color:var(--text2);font-weight:400}
.price-card ul{list-style:none;text-align:left;margin:24px 0}
.price-card li{padding:8px 0;color:var(--text2);font-size:.9rem}
.price-card li::before{content:'✓ ';color:var(--accent);font-weight:700}

/* App page */
.app-header{display:flex;justify-content:space-between;align-items:center;padding:20px 0;flex-wrap:wrap;gap:12px}
.user-info{display:flex;align-items:center;gap:12px}
.badge{background:var(--primary);color:#fff;padding:2px 10px;border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase}

.upload-section{background:var(--surface);border-radius:var(--radius);padding:40px;margin:20px 0}
.upload-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}
.drop-zone{border:2px dashed var(--surface2);border-radius:var(--radius);padding:40px 20px;text-align:center;cursor:pointer;transition:.2s;position:relative;min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center}
.drop-zone:hover,.drop-zone.dragover{border-color:var(--accent);background:rgba(34,197,94,.05)}
.drop-zone .icon{font-size:2rem;margin-bottom:8px}
.drop-zone p{color:var(--text2);font-size:.9rem}
.drop-zone img{max-width:100%;max-height:200px;border-radius:8px;object-fit:cover}
.drop-zone input{display:none}

.form-row{display:grid;grid-template-columns:2fr 1fr;gap:16px;margin-bottom:20px}
input[type=text],input[type=email],input[type=password],select{width:100%;padding:10px 16px;border-radius:8px;border:1px solid var(--surface2);background:var(--bg);color:var(--text);font-size:.9rem}
input:focus,select:focus{outline:none;border-color:var(--accent)}
label{display:block;margin-bottom:6px;font-size:.85rem;color:var(--text2)}

/* Result */
.result-section{background:var(--surface);border-radius:var(--radius);padding:32px;margin:20px 0;display:none}
.result-section.active{display:block}
.slider-container{position:relative;width:100%;max-width:700px;margin:0 auto;aspect-ratio:4/3;overflow:hidden;border-radius:var(--radius);background:#222}
.slider-container img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.slider-container .after-img{clip-path:inset(0 0 0 50%)}
.slider-container input[type=range]{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:ew-resize;z-index:10;margin:0}
.slider-line{position:absolute;top:0;width:3px;height:100%;background:var(--accent);left:50%;transform:translateX(-50%);pointer-events:none;z-index:5}
.slider-line::after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:40px;height:40px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.4)}
.caption-box{background:var(--bg);border-radius:8px;padding:16px;margin-top:20px;position:relative}
.caption-box p{font-size:.9rem;color:var(--text2)}
.copy-btn{position:absolute;top:8px;right:8px}

/* Gallery */
.gallery{padding:20px 0 60px}
.gallery h2{margin-bottom:20px}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.gallery-card{background:var(--surface);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:.2s}
.gallery-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.3)}
.gallery-card .thumb{height:180px;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-size:2rem;color:var(--text2)}
.gallery-card .info{padding:16px}
.gallery-card .info h3{font-size:1rem;margin-bottom:4px}
.gallery-card .info p{font-size:.8rem;color:var(--text2)}

/* Auth page */
.auth-container{max-width:420px;margin:80px auto;padding:0 20px}
.auth-box{background:var(--surface);border-radius:var(--radius);padding:40px 32px}
.auth-box h2{text-align:center;margin-bottom:24px}
.auth-box .form-group{margin-bottom:16px}
.auth-box .btn{width:100%;justify-content:center;margin-top:8px}
.auth-toggle{text-align:center;margin-top:16px;color:var(--text2);font-size:.9rem}
.error-msg{background:#dc2626;color:#fff;padding:8px 16px;border-radius:8px;font-size:.85rem;margin-bottom:16px;display:none}

/* Footer */
footer{background:var(--surface);padding:32px 0;text-align:center;color:var(--text2);font-size:.85rem;margin-top:60px}

/* Loading */
.loading{display:none;text-align:center;padding:20px}
.loading.active{display:block}
.spinner{width:36px;height:36px;border:3px solid var(--surface2);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}

@media(max-width:640px){
.hero h1{font-size:2rem}
.upload-grid{grid-template-columns:1fr}
.form-row{grid-template-columns:1fr}
.pricing-grid{grid-template-columns:1fr}
}