/* Email Signature Generator - style.css */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --primary:#6c5ce7;--primary-dark:#5a4bd1;--accent:#00cec9;
    --bg:#f0f2f5;--card:#fff;--text:#2d3436;--text-light:#636e72;
    --border:#dfe6e9;--radius:12px;--shadow:0 2px 16px rgba(0,0,0,0.07);
}
.dark{
    --bg:#1a1a2e;--card:#16213e;--text:#e0e0e0;--text-light:#a0a0b0;
    --border:#2a2a4a;--shadow:0 2px 16px rgba(0,0,0,0.3);
}
body{
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans JP',sans-serif;
    background:var(--bg);color:var(--text);line-height:1.6;
    transition:background 0.3s,color 0.3s;
}

/* Header */
header{
    background:linear-gradient(135deg,#2d3436 0%,#636e72 50%,var(--primary) 100%);
    color:#fff;padding:2.5rem 1rem 2rem;
}
.header-inner{
    max-width:1100px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;
}
.header-inner>div{text-align:left}
header h1{font-size:2.2rem;font-weight:800;letter-spacing:-0.02em}
header p{opacity:0.9;margin-top:0.4rem;font-size:1.05rem}
.dark-toggle{
    background:rgba(255,255,255,0.15);border:2px solid rgba(255,255,255,0.3);
    border-radius:50%;width:44px;height:44px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;color:#fff;
    transition:background 0.2s;flex-shrink:0;
}
.dark-toggle:hover{background:rgba(255,255,255,0.25)}

/* Main Layout */
main{
    max-width:1100px;margin:2rem auto;padding:0 1rem;
    display:grid;grid-template-columns:1fr 1fr;gap:2rem;
}
.panel{
    background:var(--card);border-radius:var(--radius);
    padding:1.5rem;box-shadow:var(--shadow);
}
.panel h2{
    font-size:1.15rem;margin-bottom:1rem;padding-bottom:0.5rem;
    border-bottom:2px solid var(--primary);color:var(--primary);
}
.panel h3{font-size:0.95rem;margin:1.2rem 0 0.6rem;color:var(--text-light)}

/* Form Grid */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0.7rem}
.form-grid label{
    display:flex;flex-direction:column;font-size:0.82rem;
    font-weight:600;color:var(--text-light);
}
.form-grid input{
    padding:0.5rem 0.7rem;border:2px solid var(--border);border-radius:8px;
    font-size:0.9rem;margin-top:0.2rem;transition:border-color 0.2s;font-family:inherit;
}
.form-grid input:focus{
    outline:none;border-color:var(--primary);
    box-shadow:0 0 0 3px rgba(108,92,231,0.12);
}

/* Template Buttons */
.template-grid{display:flex;gap:0.4rem;flex-wrap:wrap}
.tpl-btn{
    padding:0.45rem 0.9rem;border:2px solid var(--border);border-radius:8px;
    background:var(--card);cursor:pointer;font-size:0.85rem;font-weight:600;
    transition:all 0.2s;font-family:inherit;color:var(--text);
}
.tpl-btn:hover{border-color:var(--primary);color:var(--primary)}
.tpl-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.tpl-pro{border-color:#ddd;color:#b2bec3}
.tpl-pro:hover{border-color:#b2bec3;color:#b2bec3}
.badge{
    background:var(--accent);color:#fff;padding:0.1rem 0.35rem;
    border-radius:4px;font-size:0.65rem;vertical-align:middle;
}

/* Section Title */
.section-title{font-size:0.88rem;font-weight:700;color:var(--text-light);margin:1rem 0 0.5rem;display:flex;align-items:center;gap:0.5rem}

/* Photo Upload */
.photo-upload{margin-bottom:0.5rem}
.photo-area{display:flex;align-items:center;gap:0.6rem;flex-wrap:wrap}
.photo-hint{font-size:0.72rem;color:var(--text-light)}
.photo-preview-wrap{display:flex;align-items:center;gap:0.6rem;margin-top:0.4rem}
.photo-preview-img{width:60px;height:60px;object-fit:cover;border:1px solid var(--border);border-radius:50%;background:#fff}
.btn-small{background:var(--primary);color:#fff;border:none;border-radius:5px;padding:0.25rem 0.6rem;cursor:pointer;font-size:0.78rem;font-family:inherit}
.btn-small:hover{opacity:0.85}
.btn-del{background:#ff7675}
.btn-del:hover{background:#d63031}

/* Template Actions */
.template-actions{display:flex;gap:0.5rem;flex-wrap:wrap}

/* Customize */
.customize{display:grid;grid-template-columns:1fr 1fr;gap:0.7rem}
.customize label{
    display:flex;flex-direction:column;font-size:0.82rem;
    font-weight:600;color:var(--text-light);
}
.customize input[type="color"]{
    width:100%;height:36px;border:2px solid var(--border);border-radius:8px;
    cursor:pointer;margin-top:0.25rem;padding:2px;
}
.customize select{
    padding:0.45rem;border:2px solid var(--border);border-radius:8px;
    margin-top:0.25rem;font-family:inherit;background:var(--card);color:var(--text);
}

/* Preview */
.preview-box{
    background:#fff;border:1px solid var(--border);border-radius:8px;
    padding:1.5rem;min-height:200px;margin-bottom:1rem;
    overflow-x:auto;
}
.placeholder{color:var(--text-light);font-size:0.9rem;text-align:center;padding:2rem;line-height:1.8}

/* Actions */
.actions{display:flex;gap:0.7rem;margin-bottom:0.5rem}
.btn-primary,.btn-secondary{
    flex:1;padding:0.7rem;border-radius:8px;font-size:0.95rem;
    font-weight:700;cursor:pointer;transition:all 0.2s;font-family:inherit;border:2px solid var(--primary);
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:var(--card);color:var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff}
.dark .form-grid input{background:var(--card);color:var(--text)}
.dark .preview-box{background:var(--card)}

.copy-msg{
    text-align:center;font-size:0.85rem;color:#00b894;
    font-weight:600;min-height:1.4em;margin-bottom:0.5rem;
}

/* Usage */
.usage{text-align:center;font-size:0.84rem;color:var(--text-light);padding-top:0.3rem}

/* Premium Banner */
.premium-banner{
    max-width:1100px;margin:2rem auto;padding:2rem 1.5rem;
    background:linear-gradient(135deg,#2d3436 0%,var(--primary) 100%);
    color:#fff;border-radius:var(--radius);text-align:center;
    box-shadow:0 4px 20px rgba(0,0,0,0.15);
}
.premium-banner h2{font-size:1.4rem;margin-bottom:1rem}
.pro-features{
    display:flex;justify-content:center;flex-wrap:wrap;gap:0.6rem;margin-bottom:1.5rem;
}
.pro-features span{
    background:rgba(255,255,255,0.2);padding:0.35rem 0.8rem;
    border-radius:20px;font-size:0.85rem;
}
.pro-features span::before{content:"\2713 "}
.btn-premium{
    padding:0.8rem 2.5rem;background:#fff;color:var(--primary);
    border:none;border-radius:8px;font-size:1rem;font-weight:700;
    cursor:pointer;transition:transform 0.2s;
}
.btn-premium:hover{transform:scale(1.03)}

/* HowTo Accordion */
.howto-accordion{
    margin-top:1rem;border:1px solid var(--border);border-radius:8px;
    overflow:hidden;
}
.howto-accordion summary{
    padding:0.7rem 1rem;cursor:pointer;font-weight:600;font-size:0.88rem;
    color:var(--primary);background:var(--bg);user-select:none;
}
.howto-accordion summary:hover{background:var(--border)}
.howto-content{padding:0.8rem 1rem;font-size:0.85rem;line-height:1.7}
.howto-content h4{font-size:0.9rem;color:var(--primary);margin:0.8rem 0 0.3rem}
.howto-content h4:first-child{margin-top:0}
.howto-content ol{padding-left:1.2rem;margin-bottom:0.5rem}

/* Why Section */
.why-section{
    max-width:1100px;margin:2.5rem auto;padding:0 1rem;
}
.why-section h2{
    text-align:center;font-size:1.5rem;margin-bottom:1.5rem;
    color:var(--text);
}
.why-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem;
}
.why-card{
    background:var(--card);padding:1.5rem;border-radius:var(--radius);
    box-shadow:var(--shadow);border-left:4px solid var(--primary);
}
.why-card h3{font-size:1rem;color:var(--primary);margin-bottom:0.5rem}
.why-card p{font-size:0.9rem;color:var(--text-light);line-height:1.7}

/* Feedback Section */
.feedback-section{
    max-width:600px;margin:2rem auto;text-align:center;padding:0 1rem;
}
.feedback-section h2{font-size:1.2rem;margin-bottom:0.5rem}
.feedback-section p{font-size:0.9rem;color:var(--text-light);margin-bottom:1rem}
.btn-feedback{
    display:inline-block;padding:0.6rem 2rem;background:var(--card);
    color:var(--primary);border:2px solid var(--primary);border-radius:8px;
    text-decoration:none;font-weight:600;font-size:0.9rem;transition:all 0.2s;
}
.btn-feedback:hover{background:var(--primary);color:#fff}

/* Ad Space */
.ad-space{
    max-width:1100px;margin:1rem auto;padding:0.8rem;
    background:#e9ecef;text-align:center;border-radius:8px;
    color:#adb5bd;font-size:0.78rem;min-height:60px;
    display:flex;align-items:center;justify-content:center;
}
.ad-space::after{content:"Ad Space (Google AdSense)"}

/* Footer */
footer{text-align:center;padding:2rem 1rem;color:var(--text-light);font-size:0.83rem}
footer a{color:var(--primary);text-decoration:none}
footer a:hover{text-decoration:underline}

/* Responsive */
@media(max-width:768px){
    main{grid-template-columns:1fr;gap:1.2rem}
    header{padding:1.8rem 1rem 1.5rem}
    .header-inner{flex-direction:row;gap:0.5rem}
    .header-inner>div{text-align:left}
    header h1{font-size:1.6rem}
    .form-grid{grid-template-columns:1fr}
    .customize{grid-template-columns:1fr}
    .pro-features{flex-direction:column;align-items:center}
    .why-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
    .template-grid{gap:0.3rem}
    .tpl-btn{padding:0.35rem 0.6rem;font-size:0.78rem}
    .panel{padding:1rem}
    .actions{flex-direction:column}
    header h1{font-size:1.3rem}
    .header-inner>div{text-align:center}
    .header-inner{flex-direction:column;gap:0.8rem}
}
.skip-to-content{position:absolute;top:-100%;left:0;background:var(--accent,#4a6cf7);color:#fff;padding:8px 16px;z-index:10000;font-size:.9rem;border-radius:0 0 4px 0;transition:top .2s}.skip-to-content:focus{top:0}