:root{--slate-900:#0f172a;--slate-800:#1e293b;--slate-700:#334155;--slate-600:#475569;--slate-500:#64748b;--slate-400:#94a3b8;--slate-300:#cbd5e1;--slate-200:#e2e8f0;--slate-100:#f1f5f9;--slate-50:#f8fafc;--gold:#d4a853;--gold-light:#e8c97a;--gold-dark:#b8912e;--green:#22c55e;--red:#ef4444;--blue:#3b82f6}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--slate-50);color:var(--slate-800);line-height:1.6}
a{color:var(--gold-dark);text-decoration:none}
a:hover{color:var(--gold)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* NAV */
nav{background:var(--slate-900);padding:16px 0;position:sticky;top:0;z-index:100;border-bottom:1px solid var(--slate-700)}
nav .container{display:flex;justify-content:space-between;align-items:center}
.logo{font-size:22px;font-weight:700;color:#fff;letter-spacing:-0.5px}
.logo span{color:var(--gold)}
nav .links{display:flex;gap:20px;align-items:center}
nav .links a{color:var(--slate-300);font-size:14px;font-weight:500;transition:.2s}
nav .links a:hover{color:#fff}
.btn{display:inline-block;padding:10px 24px;border-radius:8px;font-weight:600;font-size:14px;border:none;cursor:pointer;transition:.2s;text-align:center}
.btn-gold{background:var(--gold);color:var(--slate-900)}.btn-gold:hover{background:var(--gold-light)}
.btn-outline{border:1px solid var(--slate-300);color:var(--slate-700);background:transparent}.btn-outline:hover{border-color:var(--gold);color:var(--gold-dark)}
.btn-dark{background:var(--slate-800);color:#fff}.btn-dark:hover{background:var(--slate-700)}
.btn-sm{padding:8px 16px;font-size:13px}
.btn-lg{padding:14px 32px;font-size:16px}

/* HERO */
.hero{padding:80px 0;text-align:center;background:linear-gradient(135deg,var(--slate-900),var(--slate-800));color:#fff}
.hero h1{font-size:52px;font-weight:800;letter-spacing:-1.5px;line-height:1.1;margin-bottom:20px}
.hero h1 span{color:var(--gold)}
.hero p{font-size:20px;color:var(--slate-400);max-width:650px;margin:0 auto 32px}
.hero-badges{display:flex;gap:12px;justify-content:center;margin-top:24px;flex-wrap:wrap}
.hero-badges span{background:var(--slate-700);padding:6px 14px;border-radius:20px;font-size:13px;color:var(--slate-300)}

/* SECTIONS */
section{padding:80px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:36px;font-weight:700;letter-spacing:-0.5px;margin-bottom:12px}
.section-title p{color:var(--slate-500);font-size:18px;max-width:600px;margin:0 auto}

/* FEATURES */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:12px;padding:32px;border:1px solid var(--slate-200);transition:.2s}
.feature-card:hover{border-color:var(--gold);box-shadow:0 4px 20px rgba(212,168,83,.15)}
.feature-icon{width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;background:var(--slate-100)}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.feature-card p{color:var(--slate-500);font-size:14px}

/* COMPARE */
.compare-box{background:linear-gradient(135deg,var(--slate-800),var(--slate-900));border-radius:16px;padding:48px;color:#fff;display:grid;grid-template-columns:1fr auto 1fr;gap:32px;align-items:center}
.compare-side h3{font-size:14px;text-transform:uppercase;letter-spacing:1px;color:var(--slate-400);margin-bottom:8px}
.compare-side .price{font-size:36px;font-weight:700}
.compare-side .price.old{color:var(--red);text-decoration:line-through}
.compare-side .price.new{color:var(--gold)}
.compare-vs{font-size:20px;font-weight:700;color:var(--slate-500)}

/* PRICING */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;max-width:960px;margin:0 auto}
.pricing-card{background:#fff;border-radius:16px;padding:36px;border:2px solid var(--slate-200);text-align:center;position:relative}
.pricing-card.popular{border-color:var(--gold);transform:scale(1.03)}
.pricing-card.popular::before{content:'MOST POPULAR';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gold);color:var(--slate-900);padding:4px 16px;border-radius:20px;font-size:11px;font-weight:700;letter-spacing:1px}
.pricing-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.pricing-card .price{font-size:42px;font-weight:800;margin:16px 0 8px}
.pricing-card .price span{font-size:16px;font-weight:400;color:var(--slate-500)}
.pricing-card .period{color:var(--slate-500);font-size:14px;margin-bottom:24px}
.pricing-card ul{list-style:none;text-align:left;margin-bottom:28px}
.pricing-card ul li{padding:6px 0;font-size:14px;color:var(--slate-600)}
.pricing-card ul li::before{content:'✓';color:var(--gold);font-weight:700;margin-right:8px}

/* BEFORE/AFTER */
.ba-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:24px}
.ba-card{border-radius:12px;overflow:hidden;background:#fff;border:1px solid var(--slate-200)}
.ba-images{display:grid;grid-template-columns:1fr 1fr;position:relative}
.ba-images img{width:100%;height:250px;object-fit:cover}
.ba-label{position:absolute;top:12px;padding:4px 12px;background:rgba(0,0,0,.7);color:#fff;font-size:11px;font-weight:600;border-radius:4px;text-transform:uppercase;letter-spacing:1px}
.ba-label.before{left:12px}
.ba-label.after{right:12px}
.ba-info{padding:20px}
.ba-info h4{font-size:16px;margin-bottom:4px}
.ba-info p{color:var(--slate-500);font-size:13px}

/* FOOTER */
footer{background:var(--slate-900);color:var(--slate-400);padding:48px 0 24px;text-align:center;font-size:14px}
footer .links{margin-bottom:24px;display:flex;gap:24px;justify-content:center}
footer .links a{color:var(--slate-400)}footer .links a:hover{color:var(--gold)}

/* AUTH FORMS */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--slate-100)}
.auth-card{background:#fff;border-radius:16px;padding:48px;width:100%;max-width:420px;box-shadow:0 4px 24px rgba(0,0,0,.08)}
.auth-card h2{font-size:28px;font-weight:700;margin-bottom:8px}
.auth-card p{color:var(--slate-500);margin-bottom:28px;font-size:14px}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--slate-700)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 14px;border:1px solid var(--slate-300);border-radius:8px;font-size:14px;transition:.2s;font-family:inherit}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(212,168,83,.15)}
.error-msg{color:var(--red);font-size:13px;margin-top:8px;display:none}
.form-group textarea{min-height:80px;resize:vertical}

/* APP */
.app-layout{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{background:var(--slate-900);padding:24px;color:#fff}
.sidebar .logo{margin-bottom:32px;display:block}
.sidebar-nav a{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:8px;color:var(--slate-400);font-size:14px;margin-bottom:4px;transition:.2s}
.sidebar-nav a:hover,.sidebar-nav a.active{background:var(--slate-800);color:#fff}
.sidebar-user{margin-top:auto;padding-top:24px;border-top:1px solid var(--slate-700);font-size:13px;color:var(--slate-400)}
.main-content{padding:32px;overflow-y:auto}
.main-content h1{font-size:28px;font-weight:700;margin-bottom:24px}

/* UPLOAD AREA */
.upload-area{border:2px dashed var(--slate-300);border-radius:16px;padding:48px;text-align:center;cursor:pointer;transition:.2s;background:var(--slate-50)}
.upload-area:hover{border-color:var(--gold);background:#fff}
.upload-area.dragover{border-color:var(--gold);background:rgba(212,168,83,.05)}
.upload-icon{font-size:48px;margin-bottom:16px}
.upload-area p{color:var(--slate-500);font-size:14px}

/* OPTIONS */
.options-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}
.option-group label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;color:var(--slate-700)}
.option-cards{display:flex;flex-wrap:wrap;gap:8px}
.option-card{padding:8px 16px;border:1px solid var(--slate-300);border-radius:8px;font-size:13px;cursor:pointer;transition:.2s;background:#fff}
.option-card:hover{border-color:var(--gold)}
.option-card.selected{border-color:var(--gold);background:rgba(212,168,83,.1);color:var(--gold-dark);font-weight:600}

/* RESULTS */
.result-panel{background:#fff;border-radius:16px;border:1px solid var(--slate-200);padding:24px;margin-top:24px}
.result-images{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.result-images img{width:100%;border-radius:8px;object-fit:cover;max-height:400px}
.result-label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--slate-500);margin-bottom:8px}
.result-description{background:var(--slate-50);border-radius:8px;padding:16px;margin-top:16px;font-size:14px;color:var(--slate-600);line-height:1.7}

/* HISTORY */
.history-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-top:24px}
.history-card{background:#fff;border-radius:12px;overflow:hidden;border:1px solid var(--slate-200);transition:.2s;cursor:pointer}
.history-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}
.history-card img{width:100%;height:180px;object-fit:cover}
.history-card .info{padding:14px}
.history-card .info h4{font-size:14px;font-weight:600}
.history-card .info p{font-size:12px;color:var(--slate-500)}

/* USAGE BAR */
.usage-bar{background:var(--slate-200);border-radius:20px;height:8px;margin:12px 0;overflow:hidden}
.usage-bar .fill{height:100%;background:var(--gold);border-radius:20px;transition:width .3s}
.usage-text{font-size:12px;color:var(--slate-500)}

/* LOADING */
.spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--slate-300);border-top-color:var(--gold);border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,.8);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:1000;color:#fff}
.loading-overlay .spinner{width:48px;height:48px;border-width:3px}
.loading-overlay p{margin-top:16px;font-size:16px}

/* RESPONSIVE */
@media(max-width:768px){
  .hero h1{font-size:32px}.hero p{font-size:16px}
  .compare-box{grid-template-columns:1fr;text-align:center}
  .app-layout{grid-template-columns:1fr}.sidebar{display:none}
  .options-grid{grid-template-columns:1fr}
  .result-images{grid-template-columns:1fr}
  .ba-grid{grid-template-columns:1fr}
}