*{box-sizing:border-box;}
html,body{margin:0;padding:0;height:100%;}
body{font-family:'Segoe UI',Arial,sans-serif;background-color:#eef1f5;color:#222;display:flex;flex-direction:column;min-height:100vh;}

.header{background:linear-gradient(135deg,#2c3e50,#5a5568);display:flex;align-items:center;justify-content:center;text-align:center;flex-wrap:wrap;color:#fff;padding:25px 20px;box-shadow:0 2px 8px rgba(0,0,0,0.15);flex-shrink:0}
.header img{width:58px;height:58px;margin-right:12px}
.header_text{display:flex;flex-direction:column;align-items:center;justify-content:center}
.header_text h1{margin:0;font-size:26px;font-weight:600;letter-spacing:0.5px}
.header_text .header_subtitle{margin:2px 0 0;font-size:15px;color:#cbd5e0;font-weight:500}

/* FIX: Content should grow to push footer down */
.content{display:flex;flex-wrap:wrap;width:96%;max-width:1600px;margin:20px auto;gap:20px;flex:1 0 auto;min-height:0;}
.panel_box{flex:1;min-width:320px;background-color:#fff;padding:18px;border-radius:10px;box-shadow:0 5px 15px rgba(0,0,0,0.08);display:flex;flex-direction:column;}

.panel_label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:#5a5568;margin-bottom:10px;flex-shrink:0;}
.textarea_input{width:100%;min-height:188px;max-height:288px;padding:15px;font-size:15px;line-height:1.5;border:1.5px solid #dfe3e8;border-radius:8px;resize:none;font-family:inherit;background-color:#fafbfc;transition:border-color 0.2s,box-shadow 0.2s;}
.textarea_input:focus{outline:none;border-color:#5CAF50;box-shadow:0 0 0 3px rgba(76,175,80,0.15);background-color:#fff;}
.textarea_input:read-only{background-color:#f5f7fa;}
.button_group{display:flex;gap:10px;margin-top:15px;flex-shrink:0;}

.button_clear{flex:1;padding:12px 18px;background-color:#fff;color:#f55336;border:1.5px solid #f55336;border-radius:7px;font-size:13px;font-weight:700;letter-spacing:0.3px;cursor:pointer;transition:all 0.2s;}
.button_clear:hover{background-color:#f55336;color:#fff;}
.button_input{flex:1;padding:12px 18px;background-color:#5CAF50;color:#fff;border:none;border-radius:7px;font-size:13px;font-weight:700;letter-spacing:0.3px;cursor:pointer;transition:background-color 0.2s,transform 0.1s;}

.button_input:hover{background-color:#53a057;}
.button_input:active{transform:scale(0.98);}
.button_copy{width:100%;padding:12px 18px;background-color:#2196F3;color:#fff;border:none;border-radius:7px;font-size:13px;font-weight:700;letter-spacing:0.3px;cursor:pointer;transition:background-color 0.2s,transform 0.1s;}
.button_copy:hover{background-color:#1e88e5;}
.button_copy:active{transform:scale(0.98);}

/* FIX: Footer should be at bottom */
.footer{text-align:center;padding:15px;color:#8a95a3;font-size:12px;flex-shrink:0;margin-top:auto;}
.panel_box form{display:flex;flex-direction:column;flex:1;min-height:0;}

@media (max-width: 768px){
.header{padding:18px 15px;}
.header h1{font-size:21px;}
.header_subtitle{font-size:13px;}
.content{flex-direction:column;width:95%;margin:15px auto;flex:1 0 auto;}
.panel_box{min-width:0;padding:15px;}
.textarea_input{font-size:15px;padding:12px;}
.button_group{gap:8px;}
.button_clear,.button_input,.button_copy{padding:11px 15px;font-size:12px;}

.footer{padding:10px;font-size:11px;}
}
@media (max-width: 580px){	
.header{padding:15px 12px;}
.header h1{font-size:18px;}
.header_subtitle{font-size:12px;margin-top:6px;}
.content{width:96%;margin:12px auto;gap:15px;flex:1 0 auto;}
.panel_box{padding:12px;border-radius:8px;}
.panel_label{font-size:12px;margin-bottom:8px;}

.textarea_input{font-size:13px;padding:10px;border-radius:6px;}
.button_group{flex-direction:column;margin-top:10px;}
.button_clear,.button_input,.button_copy{width:100%;padding:10px 15px;}
}