:root{--primary:#2c3e50;--accent:#e74c3c;--accent-hover:#c0392b;--secondary:#3498db;--success:#27ae60;--success-hover:#219e50;--gray:#95a5a6;--light-gray:#ecf0f1;--text:#2c3e50;--bg-gradient:linear-gradient(135deg, #74ebd5, #9face6);--container-bg:white;--shadow:0 10px 25px rgba(0, 0, 0, 0.25);--border-radius:18px;--transition:all 0.3s ease}body.dark-mode{--primary:#ecf0f1;--text:#ecf0f1;--success:#27ae60;--container-bg:#1E123C;--shadow:0 10px 25px rgba(0, 0, 0, 0.4);--bg-gradient:linear-gradient(135deg, #16213e, #0f3460)}.ph-container{max-width:100%;margin:auto;background:var(--container-bg);border-radius:0;padding:50px 30px;overflow:hidden;position:relative;transition:background 0.5s}.theme-toggle{position:absolute;top:5px;right:35px;display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary);cursor:pointer;z-index:10;background:rgb(255 255 255 / .1);backdrop-filter:blur(5px);padding:8px 12px;border-radius:20px;border:1px solid rgb(255 255 255 / .2);box-shadow:0 2px 10px rgb(0 0 0 / .1)}body.dark-mode .theme-toggle{background:rgb(0 0 0 / .3);border-color:rgb(255 255 255 / .1)}.theme-toggle .sun{opacity:1}.theme-toggle .moon{opacity:.25}body.dark-mode .theme-toggle .sun{opacity:.25}body.dark-mode .theme-toggle .moon{opacity:1}.placeholder-image-title-suite{color:#e74c3ce6!important}.placeholder-image-title{color:#ffffff!important}.tool-wrapper{width:100%;max-width:82rem;margin-left:auto;margin-right:auto;display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:2rem;align-items:start;padding-bottom:30px}@media (min-width:1024px){.tool-wrapper{grid-template-columns:repeat(12,minmax(0,1fr))}}.controls{color:var(--text);border-radius:1rem;box-shadow:0 20px 25px -5px rgb(0 0 0 / .1),0 10px 10px -5px rgb(0 0 0 / .04);padding:1.5rem;border:1px solid #e5e7eb}@media (min-width:1024px){.controls{grid-column:span 5 / span 5}}body.dark-mode .controls{border-color:rgb(255 255 255 / .1)}.calculator-modes{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:30px}.mode-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 16px;background:#fff;border:2px solid #bdc3c7;border-radius:12px;color:var(--text);font-size:.95rem;font-weight:600;cursor:pointer;transition:var(--transition);font-family:inherit}body.dark-mode .mode-btn{background:#2c2c3e;border-color:#555}.mode-btn:hover{border-color:var(--accent);background:rgb(231 76 60 / .05);transform:translateY(-2px)}.mode-btn.active{background:var(--accent)!important;border-color:var(--accent)!important;color:#fff}.mode-btn svg{flex-shrink:0}.calc-mode{display:none}.calc-mode.active{display:block;animation:fadeIn 0.3s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.mode-title{font-size:1.4rem;color:var(--text)!important;margin-bottom:8px;font-weight:700}.mode-description{color:var(--text);opacity:.7;margin-bottom:25px;font-size:.95rem}.input-group{margin-bottom:20px;position:relative}.input-group label{display:block;font-size:.95rem;font-weight:600;color:var(--text);margin-bottom:8px}.label-hint{opacity:.5;font-weight:400;font-size:.85rem}.calc-input{width:100%;padding:14px 18px;font-size:1rem;font-weight:600;border:2px solid #bdc3c7;border-radius:12px;background:#fff;color:var(--text);transition:var(--transition);font-family:inherit}body.dark-mode .calc-input{background:#2c2c3e;border-color:#555;color:#fff}.calc-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgb(231 76 60 / .1)}.input-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.color-input-wrapper{display:flex;align-items:center;gap:10px;border:2px solid #bdc3c7;border-radius:12px;background:#fff;padding:8px 14px;transition:var(--transition);cursor:pointer}body.dark-mode .color-input-wrapper{background:#2c2c3e;border-color:#555}.color-input-wrapper:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgb(231 76 60 / .1)}.color-swatch{width:32px;height:32px;border-radius:8px;border:none;cursor:pointer;padding:0;background:none;flex-shrink:0}.color-hex-input{background:#fff0;border:none;outline:none;font-size:1rem;font-weight:600;color:var(--text);font-family:inherit;width:100%}body.dark-mode .color-hex-input{color:#fff}.presets-label{font-size:.95rem;font-weight:600;color:var(--text);margin-bottom:10px;display:block}.presets-grid{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.preset-btn{padding:7px 14px;background:#fff;border:2px solid #bdc3c7;border-radius:10px;color:var(--text);font-size:.85rem;font-weight:600;cursor:pointer;transition:var(--transition);font-family:inherit}body.dark-mode .preset-btn{background:#2c2c3e;border-color:#555}.preset-btn:hover{border-color:var(--accent);background:rgb(231 76 60 / .05);transform:translateY(-2px)}.preset-btn.active{background:var(--accent)!important;border-color:var(--accent)!important;color:#fff}.format-grid{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}.format-btn{flex:1;min-width:60px;padding:10px;background:#fff;border:2px solid #bdc3c7;border-radius:10px;color:var(--text);font-size:.9rem;font-weight:700;cursor:pointer;transition:var(--transition);font-family:inherit;text-align:center}body.dark-mode .format-btn{background:#2c2c3e;border-color:#555}.format-btn:hover{border-color:var(--secondary);background:rgb(52 152 219 / .05);transform:translateY(-2px)}.format-btn.active{background:var(--secondary)!important;border-color:var(--secondary)!important;color:#fff}.download-btn{width:100%;padding:16px;background:var(--success);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:700;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:10px;box-shadow:0 8px 20px rgb(0 0 0 / .15);margin-bottom:20px;font-family:inherit}.download-btn:hover{opacity:.9;transform:translateY(-2px)}.download-btn:active{transform:translateY(0)}.info-display-container{display:flex;flex-direction:column;gap:30px}@media (min-width:1024px){.info-display-container{grid-column:span 7 / span 7}}.live-preview-panel{background:var(--container-bg);border-radius:var(--border-radius);border:1px solid #e5e7eb;box-shadow:0 3px 10px rgb(0 0 0 / .06);overflow:hidden}body.dark-mode .live-preview-panel{border-color:rgb(255 255 255 / .1);background:#2c2c3e}.live-preview-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid #e5e7eb;background:rgb(0 0 0 / .02)}body.dark-mode .live-preview-header{border-bottom-color:rgb(255 255 255 / .08);background:rgb(255 255 255 / .03)}.live-badge{display:flex;align-items:center;gap:7px;font-size:.85rem;font-weight:700;color:var(--success);text-transform:uppercase;letter-spacing:.05em}.live-dot{width:8px;height:8px;background:var(--success);border-radius:50%;animation:livePulse 1.5s ease-in-out infinite}@keyframes livePulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}.preview-dimensions{font-size:.9rem;font-weight:600;color:var(--text);opacity:.6}.preview-stage{display:flex;align-items:center;justify-content:center;padding:24px;min-height:280px;background:linear-gradient(45deg,#ccc 25%,transparent 25%),linear-gradient(-45deg,#ccc 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ccc 75%),linear-gradient(-45deg,transparent 75%,#ccc 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;background-color:#e8e8e8}body.dark-mode .preview-stage{background:linear-gradient(45deg,#2a2a2a 25%,transparent 25%),linear-gradient(-45deg,#2a2a2a 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#2a2a2a 75%),linear-gradient(-45deg,transparent 75%,#2a2a2a 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;background-color:#1a1a2e}#main-canvas{display:block;max-width:100%;max-height:340px;object-fit:contain;border-radius:4px;box-shadow:0 8px 32px rgb(0 0 0 / .25);transition:box-shadow 0.3s ease}#main-canvas:hover{box-shadow:0 12px 40px rgb(0 0 0 / .35)}.preview-footer{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-top:1px solid #e5e7eb;background:rgb(0 0 0 / .02)}body.dark-mode .preview-footer{border-top-color:rgb(255 255 255 / .08);background:rgb(255 255 255 / .03)}.preview-format-badge{padding:4px 10px;background:var(--secondary);color:#fff;border-radius:6px;font-size:.75rem;font-weight:700;letter-spacing:.05em}.preview-size-info{font-size:.85rem;font-weight:600;color:var(--text);opacity:.6}.steps-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.step{display:flex;align-items:flex-start;gap:12px;padding:14px;background:var(--container-bg);border-radius:14px;box-shadow:0 3px 10px rgb(0 0 0 / .06);transition:all 0.3s ease;text-align:left;border:1px solid #e5e7eb}body.dark-mode .step{border-color:rgb(255 255 255 / .1)}.step:hover{transform:translateY(-3px);box-shadow:0 6px 14px rgb(0 0 0 / .12)}.step-number{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:#d70932;color:#fff;font-weight:700;border-radius:50%;flex-shrink:0;font-size:15px;box-shadow:0 4px 8px rgb(0 0 0 / .2)}.step p{margin:0;font-size:13px;color:var(--text)}.steps-grid-mobile{display:none}.info-section{display:grid;grid-template-columns:1fr;gap:20px}.info-card{background:var(--container-bg);padding:25px;border-radius:var(--border-radius);box-shadow:0 3px 10px rgb(0 0 0 / .06);border:1px solid #e5e7eb}body.dark-mode .info-card{border-color:rgb(255 255 255 / .1)}.info-card p{font-size:1.2rem;margin-bottom:15px;color:var(--text)!important;font-weight:700}.info-card ul{list-style:none;padding:0;margin:0}.info-card li{padding:8px 0;padding-left:25px;position:relative;color:var(--text);line-height:1.6}.info-card li::before{content:'✓';position:absolute;left:0;color:var(--success);font-weight:700}.info-card li strong{color:var(--accent)}@media (max-width:768px){.ph-container{padding:50px 0}.controls{margin-top:0;border:none!important;box-shadow:none!important}.tool-wrapper{width:95%;gap:0!important}.calculator-modes{grid-template-columns:repeat(2,1fr);gap:8px}.mode-btn{padding:10px 8px;font-size:.85rem}.input-row{grid-template-columns:1fr}.preview-stage{min-height:200px;padding:16px}.steps-grid{display:none}.steps-grid-mobile{display:block!important;padding-bottom:50px}.steps-grid-mobile .step{margin-bottom:16px}.info-section{padding:0 10px}}@media (max-width:480px){.mode-btn{font-size:.75rem;padding:8px 6px}.mode-btn svg{width:16px;height:16px}}