/* GradGenTool.com - Main Stylesheet */
/* Reset & Base Styles */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#e4e4e7;background:#0a0a0b;min-height:100vh;display:flex;flex-direction:column}

/* CSS Variables */
:root{
--primary:#9b59b6;
--primary-dark:#7d3c98;
--primary-light:#bb8fce;
--bg-dark:#0a0a0b;
--bg-card:#18181b;
--bg-elevated:#27272a;
--text-primary:#e4e4e7;
--text-secondary:#a1a1aa;
--text-muted:#71717a;
--border:#3f3f46;
--success:#10b981;
--warning:#f59e0b;
--danger:#ef4444;
--radius:12px;
--shadow:0 4px 6px -1px rgba(0,0,0,0.3),0 2px 4px -1px rgba(0,0,0,0.2);
--shadow-lg:0 20px 25px -5px rgba(0,0,0,0.4),0 10px 10px -5px rgba(0,0,0,0.3);
--transition:all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* Typography */
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:1rem;color:var(--text-primary)}
h1{font-size:2.5rem;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
h2{font-size:2rem;color:var(--text-primary)}
h3{font-size:1.5rem}
h4{font-size:1.25rem}
p{margin-bottom:1rem;color:var(--text-secondary)}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-light)}
strong{color:var(--text-primary)}

/* Header & Navigation */
header{background:var(--bg-card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow)}
nav{max-width:1400px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.logo{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;gap:0.5rem}
.nav-links{display:flex;gap:2rem;list-style:none;flex-wrap:wrap}
.nav-links a{color:var(--text-secondary);font-weight:500;padding:0.5rem 0;border-bottom:2px solid transparent;transition:var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--primary);border-bottom-color:var(--primary)}
.mobile-menu-btn{display:none;background:none;border:none;color:var(--text-primary);font-size:1.5rem;cursor:pointer;padding:0.5rem}

/* Main Content */
main{flex:1;max-width:1400px;width:100%;margin:0 auto;padding:2rem}
.container{width:100%;max-width:1200px;margin:0 auto}

/* Hero Section */
.hero{text-align:center;padding:3rem 1rem;background:linear-gradient(135deg,rgba(155,89,182,0.1),rgba(125,60,152,0.05));border-radius:var(--radius);margin-bottom:3rem}
.hero h1{font-size:3rem;margin-bottom:1rem}
.hero p{font-size:1.25rem;color:var(--text-secondary);max-width:800px;margin:0 auto 2rem}

/* Tool Container */
.tool-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin:2rem 0}
.tool-panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}
.tool-panel h3{color:var(--primary);margin-bottom:1.5rem;display:flex;align-items:center;gap:0.5rem}

/* Preview Area */
.preview-container{position:relative;min-height:400px}
.gradient-preview{width:100%;height:400px;border-radius:var(--radius);border:2px solid var(--border);transition:var(--transition);box-shadow:var(--shadow-lg);background:linear-gradient(90deg,#667eea,#764ba2)}
.preview-controls{margin-top:1rem;display:flex;gap:1rem;flex-wrap:wrap}

/* Form Controls */
.control-group{margin-bottom:1.5rem}
.control-group label{display:block;margin-bottom:0.5rem;color:var(--text-primary);font-weight:600;font-size:0.875rem;text-transform:uppercase;letter-spacing:0.5px}
.color-stop{background:var(--bg-elevated);padding:1rem;border-radius:var(--radius);margin-bottom:1rem;border:1px solid var(--border);display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.color-input-wrapper{display:flex;align-items:center;gap:0.5rem;flex:1;min-width:150px}
input[type="color"]{width:60px;height:50px;border:2px solid var(--border);border-radius:8px;cursor:pointer;background:var(--bg-elevated);transition:var(--transition)}
input[type="color"]:hover{border-color:var(--primary);transform:scale(1.05)}
input[type="text"],input[type="email"],input[type="number"],select,textarea{width:100%;padding:0.75rem 1rem;background:var(--bg-elevated);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:1rem;transition:var(--transition);font-family:inherit}
input[type="text"]:focus,input[type="email"]:focus,input[type="number"]:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(155,89,182,0.1)}
input[type="range"]{width:100%;height:8px;border-radius:5px;background:var(--bg-elevated);outline:none;-webkit-appearance:none;border:1px solid var(--border)}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:var(--primary);cursor:pointer;transition:var(--transition)}
input[type="range"]::-webkit-slider-thumb:hover{background:var(--primary-light);transform:scale(1.2)}
input[type="range"]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--primary);cursor:pointer;border:none;transition:var(--transition)}
.range-value{display:inline-block;min-width:60px;text-align:center;padding:0.25rem 0.75rem;background:var(--bg-elevated);border-radius:6px;font-weight:600;color:var(--primary);margin-left:0.5rem}

/* Buttons */
button,.btn{padding:0.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;gap:0.5rem;justify-content:center;font-family:inherit;text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{background:#059669;transform:translateY(-2px)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#dc2626}
.btn-small{padding:0.5rem 1rem;font-size:0.875rem}
.btn-icon{padding:0.5rem;width:40px;height:40px;border-radius:8px}
button:disabled{opacity:0.5;cursor:not-allowed}

/* Code Display */
.code-container{margin:1.5rem 0}
.code-output{width:100%;min-height:120px;padding:1rem;background:var(--bg-dark);border:1px solid var(--border);border-radius:var(--radius);color:#10b981;font-family:'Courier New',monospace;font-size:0.875rem;resize:vertical;line-height:1.8}
.code-actions{display:flex;gap:0.5rem;margin-top:0.5rem}

/* Content Sections */
.content-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin:2rem 0;box-shadow:var(--shadow)}
.content-section h2{color:var(--primary);margin-bottom:1.5rem}
.content-section h3{color:var(--text-primary);margin-top:2rem;margin-bottom:1rem}
.content-section ul,.content-section ol{margin-left:1.5rem;margin-bottom:1rem;color:var(--text-secondary)}
.content-section li{margin-bottom:0.5rem}
.content-section code{background:var(--bg-elevated);padding:0.2rem 0.5rem;border-radius:4px;color:var(--primary-light);font-family:'Courier New',monospace;font-size:0.9em}
.content-section pre{background:var(--bg-dark);padding:1rem;border-radius:var(--radius);overflow-x:auto;margin:1rem 0;border:1px solid var(--border)}
.content-section pre code{background:none;padding:0}

/* FAQ Section */
.faq-container{margin:2rem 0}
.faq-item{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:1rem;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--primary)}
.faq-question{padding:1.25rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--text-primary);user-select:none}
.faq-question::after{content:'▼';font-size:0.75rem;color:var(--primary);transition:var(--transition)}
.faq-item.active .faq-question::after{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.3s ease}
.faq-item.active .faq-answer{max-height:500px}
.faq-answer-content{padding:0 1.25rem 1.25rem;color:var(--text-secondary)}

/* Palette Grid */
.palette-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin:2rem 0}
.palette-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:var(--transition);box-shadow:var(--shadow)}
.palette-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary)}
.palette-preview{height:200px;width:100%;transition:var(--transition)}
.palette-info{padding:1rem}
.palette-name{font-weight:600;color:var(--text-primary);margin-bottom:0.5rem}
.palette-code{font-size:0.75rem;color:var(--text-muted);font-family:'Courier New',monospace;word-break:break-all}

/* Color Palette Display */
.color-palette-display{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1rem;margin:2rem 0}
.color-swatch{text-align:center;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:var(--transition);cursor:pointer}
.color-swatch:hover{transform:scale(1.05);box-shadow:var(--shadow)}
.swatch-color{height:120px;width:100%}
.swatch-info{padding:1rem;background:var(--bg-card)}
.swatch-hex{font-family:'Courier New',monospace;font-size:0.875rem;font-weight:600;color:var(--text-primary)}

/* Alert/Toast */
.toast{position:fixed;bottom:2rem;right:2rem;background:var(--success);color:#fff;padding:1rem 1.5rem;border-radius:var(--radius);box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:0.75rem;font-weight:600;z-index:10000;animation:slideIn 0.3s ease;opacity:0;pointer-events:none}
.toast.show{opacity:1;pointer-events:auto}
@keyframes slideIn{from{transform:translateX(400px)}to{transform:translateX(0)}}

/* Footer */
footer{background:var(--bg-card);border-top:1px solid var(--border);margin-top:4rem;padding:3rem 2rem 1rem}
.footer-content{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}
.footer-section h4{color:var(--primary);margin-bottom:1rem}
.footer-links{list-style:none}
.footer-links li{margin-bottom:0.5rem}
.footer-links a{color:var(--text-secondary);transition:var(--transition)}
.footer-links a:hover{color:var(--primary);padding-left:0.5rem}
.footer-bottom{text-align:center;padding-top:2rem;border-top:1px solid var(--border);color:var(--text-muted);font-size:0.875rem}
.footer-disclaimer{font-size:0.875rem;color:var(--text-muted);font-style:italic;margin-top:0.5rem}

/* Utility Classes */
.text-center{text-align:center}
.mb-1{margin-bottom:1rem}
.mb-2{margin-bottom:2rem}
.mt-2{margin-top:2rem}
.flex{display:flex}
.flex-center{display:flex;justify-content:center;align-items:center}
.gap-1{gap:1rem}
.hidden{display:none}

/* Responsive Design */
@media(max-width:1024px){
.tool-wrapper{grid-template-columns:1fr}
.tool-panel{order:2}
.preview-container{order:1}
}

@media(max-width:768px){
nav{padding:1rem}
.nav-links{display:none;width:100%;flex-direction:column;gap:0;background:var(--bg-elevated);border-radius:var(--radius);margin-top:1rem;overflow:hidden}
.nav-links.active{display:flex}
.nav-links a{padding:1rem;border-bottom:1px solid var(--border)}
.mobile-menu-btn{display:block}
.hero h1{font-size:2rem}
.hero p{font-size:1rem}
h1{font-size:2rem}
h2{font-size:1.5rem}
main{padding:1rem}
.gradient-preview{height:300px}
.tool-panel{padding:1.5rem}
.color-stop{flex-direction:column;align-items:stretch}
.palette-grid{grid-template-columns:1fr}
.footer-content{grid-template-columns:1fr}
}

@media(max-width:480px){
.hero h1{font-size:1.75rem}
.preview-controls{flex-direction:column}
.preview-controls button{width:100%}
.code-actions{flex-direction:column}
.code-actions button{width:100%}
}

/* Print Styles */
@media print{
header,footer,.tool-panel,.preview-controls{display:none}
body{background:#fff;color:#000}
}

/* Accessibility */
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}

/* Loading States */
.loading{position:relative;pointer-events:none;opacity:0.6}
.loading::after{content:'';position:absolute;top:50%;left:50%;width:24px;height:24px;margin:-12px 0 0 -12px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 0.6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}