@import url(https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap);:root{--calc-page-bg:#ffffff;--calc-panel-bg:#ffffff;--calc-primary:#8b5cf6;--calc-listening:#3b82f6;--calc-reading:#10b981;--calc-pink:#ec4899;--calc-toggle-red:#ef4444;--calc-text-main:#111827;--calc-text-muted:#4b5563;--calc-border:#e5e7eb;--calc-tab-track:#f3f4f6;--calc-tab-active:#ffffff;--card-header-listening:#eff6ff;--card-header-reading:#f0fdf4}.ielts-calc-wrapper{font-family:'Inter',sans-serif;background:var(--calc-page-bg);min-height:100vh;display:flex;flex-direction:column;align-items:center;padding-bottom:40px}.ielts-hero-header{text-align:center;padding:60px 20px 40px;color:var(--calc-text-main);max-width:800px;margin:0 auto}.hero-icon{width:64px;height:64px;margin:0 auto 24px;border:2px solid var(--calc-text-main);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--calc-text-main);background:#fff}.hero-icon svg{width:32px;height:32px}.hero-title{font-size:3rem;font-weight:800;margin:0 0 16px 0;letter-spacing:-.03em;color:var(--calc-text-main)}.hero-subtitle{font-size:1.1rem;line-height:1.6;color:var(--calc-text-muted);font-weight:500}.ielts-calc-container{width:100%;max-width:900px;margin:0 auto 40px;background:#fff;border-radius:16px;box-shadow:0 4px 20px -1px rgb(0 0 0 / .08);border:1px solid #f3f4f6;overflow:hidden}.calc-header{background:#fff;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--calc-border)}.calc-tabs{background:var(--calc-tab-track);padding:4px;border-radius:8px;display:inline-flex;gap:4px}.calc-tab{display:flex;align-items:center;gap:8px;padding:8px 16px;border:none;background:#fff0;color:var(--calc-text-muted);font-size:.9rem;font-weight:600;cursor:pointer;border-radius:6px;transition:all 0.2s}.calc-tab.calc-active{background:var(--calc-tab-active);color:var(--calc-text-main);box-shadow:0 1px 2px rgb(0 0 0 / .05)}.calc-tab svg{width:18px;height:18px}.calc-panel{display:none;padding:32px 40px;background:#fff}.calc-panel.calc-active{display:block;animation:fadeIn 0.4s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.panel-title{font-size:1.6rem;font-weight:800;color:var(--calc-text-main);margin-bottom:12px}.panel-desc{color:var(--calc-text-muted);font-size:1rem;line-height:1.6;margin-bottom:32px}.overall-inputs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:32px}.input-label{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.8rem;color:var(--calc-text-muted);text-transform:uppercase;margin-bottom:8px}.input-label svg{color:var(--calc-primary);width:18px;height:18px}.score-input{width:100%;padding:12px;font-size:1.1rem;border:1px solid var(--calc-border);border-radius:8px;font-weight:600;color:var(--calc-text-main);text-align:center;-moz-appearance:textfield}.score-input::-webkit-outer-spin-button,.score-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.input-stepper-wrapper{display:flex;align-items:center;gap:8px}.stepper-btn{width:36px;height:36px;flex-shrink:0;border:1px solid var(--calc-border);background:#fff;color:var(--calc-text-main);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all 0.2s;user-select:none}.stepper-btn:hover{background:#f9fafb;border-color:#d1d5db}.stepper-btn:active{background:#f3f4f6;transform:scale(.95)}.overall-result-card{background:linear-gradient(135deg,#3b82f6 0%,#2563eb 100%);border-radius:16px;padding:32px;color:#fff;display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;position:relative;overflow:hidden}.result-medal{width:90px;height:90px;opacity:.2}.result-medal svg{fill:#fff;width:100%;height:100%}.result-big-score{font-size:5rem;font-weight:800;line-height:1;margin-bottom:4px}.ai-analysis-section{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px dashed var(--calc-border)}.ai-analysis-left{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--calc-text-main)}.ai-analyze-btn{background:var(--calc-primary);color:#fff;border:none;padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer}.mode-toggle-row{margin-bottom:24px}.mode-toggle{display:inline-flex;background:#fff;border:1px solid var(--calc-border);padding:4px;border-radius:8px;box-shadow:0 1px 2px rgb(0 0 0 / .05);opacity:0;pointer-events:none;transition:opacity 0.1s ease}.mode-btn{padding:8px 16px;border:none;background:#fff0;font-size:.9rem;font-weight:600;color:var(--calc-text-muted);cursor:pointer;border-radius:6px;transition:all 0.2s}.mode-btn:hover{color:var(--calc-text-main)}.mode-btn.calc-active{background:var(--calc-toggle-red);color:#fff;box-shadow:0 2px 4px rgb(239 68 68 / .3)}.current-mode-badge{display:inline-block;padding:8px 16px;background:#eff6ff;border-radius:20px;font-size:.9rem;color:#1d4ed8;font-weight:600;margin-bottom:24px;border:none}.current-mode-badge strong{color:#1d4ed8}.info-box{background:#fffbeb;border:1px solid #fcd34d;padding:16px;border-radius:10px;display:flex;gap:12px;margin-bottom:32px}.info-box svg{color:#f59e0b;width:20px;height:20px}.converter-cards-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.converter-card{border:1px solid var(--calc-border);border-radius:12px;overflow:hidden;background:#fff}.converter-card-header{padding:16px 20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--calc-border)}.converter-card:nth-child(1) .converter-card-header{background:var(--card-header-listening)}.converter-card:nth-child(2) .converter-card-header{background:var(--card-header-reading)}.converter-card-title{font-weight:700;display:flex;align-items:center;gap:10px;color:var(--calc-text-main)}.converter-card-title svg{opacity:.8;width:20px;height:20px}.converter-badge{font-size:.75rem;font-weight:600;padding:4px 10px;border-radius:20px}.converter-badge-gray{background:rgb(0 0 0 / .04);color:var(--calc-text-muted)}.converter-badge-green{background:#dcfce7;color:#166534}.converter-card-body{padding:24px}.slider-row{display:flex;align-items:center;gap:16px;margin-bottom:24px}.raw-slider{flex:1;-webkit-appearance:none;appearance:none;height:16px;border-radius:999px;background:linear-gradient(to right,var(--fill-color,#3b82f6) var(--range-progress,0%),#e5e7eb var(--range-progress,0%));box-shadow:inset 0 2px 4px rgb(0 0 0 / .1);outline:none;cursor:pointer;border:none;position:relative;z-index:1}.raw-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:32px;height:32px;border-radius:50%;background-color:#fff;border:none;box-shadow:0 4px 10px rgb(0 0 0 / .15);cursor:grab;margin-top:-8px;transition:transform 0.2s ease,box-shadow 0.2s ease;position:relative;z-index:2}#raw-listening-slider{--fill-color:var(--calc-listening)}#raw-reading-slider{--fill-color:var(--calc-reading)}.raw-slider::-webkit-slider-thumb:hover{transform:scale(1.1);box-shadow:0 6px 14px rgb(0 0 0 / .2)}.raw-slider:active::-webkit-slider-thumb{cursor:grabbing;transform:scale(1);box-shadow:0 2px 5px rgb(0 0 0 / .2)}.raw-slider::-moz-range-track{height:16px;border-radius:999px;background:linear-gradient(to right,var(--fill-color,#3b82f6) var(--range-progress,0%),#e5e7eb var(--range-progress,0%));box-shadow:inset 0 2px 4px rgb(0 0 0 / .1)}.raw-slider::-moz-range-thumb{width:32px;height:32px;border-radius:50%;background-color:#fff;border:none;box-shadow:0 4px 10px rgb(0 0 0 / .15);cursor:grab;transition:transform 0.2s ease,box-shadow 0.2s ease}.raw-slider:active::-moz-range-thumb{cursor:grabbing;transform:scale(1)}.raw-number{width:70px;padding:8px 4px;text-align:center;font-weight:700;font-size:1.1rem;border:1px solid var(--calc-border);border-radius:8px;color:#121827;background:#fff}.band-result-box{border-radius:8px;padding:24px;text-align:center;color:#fff}.listening-result{background:var(--calc-listening)}.reading-result{background:var(--calc-reading)}.band-result-score{font-size:3.5rem;font-weight:800;line-height:1;margin-top:8px}.band-result-label{font-size:.9rem;font-weight:600;opacity:.95}.ielts-calc-footer{text-align:center;color:var(--calc-text-muted);font-size:.8rem;margin-top:10px}@media (max-width:768px){.ielts-hero-header{padding:40px 20px}.hero-title{font-size:2rem}.ielts-calc-container{border-radius:0;box-shadow:none;border:none}.overall-inputs-grid,.converter-cards-grid{grid-template-columns:1fr}.calc-header{flex-direction:column;gap:16px}.ai-analysis-section{flex-direction:column;gap:16px}.ai-analyze-btn{justify-content:center}}