/* Base Design System */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f3f4f6;
    --text-color: #1f2937;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
                      radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
                      radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    background-size: cover;
    background-attachment: fixed;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 90%;
    max-width: 800px;
    margin: 2rem auto;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
}

/* Typography */
h1 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: #111827;
}

.subtitle {
    text-align: center;
    color: #4b5563;
    margin-bottom: 2rem;
}

/* Form Elements */
label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #374151;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: all 0.2s;
    box-sizing: border-box; /* Important for padding */
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn-primary {
    display: block;
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-top: 1.5rem;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-primary:active {
    transform: translateY(1px);
}

.btn-primary:disabled {
    background-color: #9ca3af;
    cursor: not-allowed;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-right: 0.5rem;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Results Section */
.result-section {
    margin-top: 2rem;
    border-top: 1px solid #e5e7eb;
    padding-top: 2rem;
    display: none; /* Hidden by default */
}

.result-section.active {
    display: block;
    animation: fadeIn 0.5s ease-out;
}

.result-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.result-card h3 {
    margin-top: 0;
    color: #111827;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-good { background-color: #d1fae5; color: #065f46; }
.badge-improve { background-color: #fee2e2; color: #991b1b; }
.badge-polished { background-color: #dbeafe; color: #1e40af; }

.result-content {
    line-height: 1.6;
    color: #4b5563;
    white-space: pre-wrap; /* Preserve line breaks */
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}