:root {
    --primary: #2ecc71;
    --danger: #e74c3c;
    --warning: #f1c40f;
    --dark: #2c3e50;
    --bg: #f8fafc;
    --indigo: #4f46e5;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.card-container {
    background: white;
    padding: 40px;
    border-radius: 28px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.1);
    max-width: 450px;
    width: 90%;
    transition: 0.5s ease;
    text-align: center;
}

.analyzing {
    animation: pulse 1.5s infinite ease-in-out;
    border: 2px solid var(--primary);
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

h2 { color: var(--dark); font-weight: 800; margin-bottom: 5px; }
.subtitle { color: #64748b; font-size: 14px; margin-bottom: 30px; }

.error-msg {
    background: #fff5f5;
    color: #c53030;
    padding: 12px;
    border-radius: 12px;
    border: 1px solid #feb2b2;
    margin-bottom: 20px;
    font-size: 13px;
    font-weight: 600;
    animation: shake 0.4s linear;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

.upload-box {
    border: 2px dashed #cbd5e0;
    padding: 30px;
    border-radius: 18px;
    cursor: pointer;
    margin-bottom: 25px;
    background: #fafafa;
}

.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 14px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
}

.results-area { display: none; margin-top: 30px; border-top: 1px solid #f1f5f9; padding-top: 25px; }

.score-section { background: #f1f5f9; padding: 20px; border-radius: 16px; margin-bottom: 20px; }
.grade-display { font-size: 32px; font-weight: 800; margin: 5px 0; }

.progress-bar { background: #e2e8f0; height: 12px; border-radius: 10px; overflow: hidden; margin-top: 10px; }
.progress-fill { background: linear-gradient(90deg, var(--danger), var(--warning), var(--primary)); height: 100%; width: 0%; transition: width 1.5s ease; }

.nutrition-item { display: flex; justify-content: space-between; padding: 14px; border-radius: 12px; margin-bottom: 10px; font-weight: 600; font-size: 14px; border: 1px solid #eee; }
.high { background: #fff5f5; color: var(--danger); border-color: #fed7d7; }
.low { background: #f0fff4; color: var(--primary); border-color: #c6f6d5; }
.med { background: #fffdf0; color: #b7791f; border-color: #fef3c7; }

.ai-insight {
    background: #eef2ff;
    padding: 18px;
    border-radius: 14px;
    margin-top: 20px;
    border-left: 5px solid var(--indigo);
    font-size: 13px;
    color: #312e81;
    line-height: 1.6;
    text-align: left;
}

.health-tips {
    background: #fff9db;
    border: 1px solid #fab005;
    padding: 15px;
    border-radius: 12px;
    margin-top: 15px;
    font-size: 13px;
    color: #862e00;
    text-align: left;
}

.loader-container { text-align: center; margin: 20px 0; color: #64748b; font-size: 14px; }
.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 35px;
    height: 35px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.disclaimer { font-size: 11px; color: #94a3b8; margin-top: 25px; }