:root {
    --bg-primary: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-secondary: #8b5cf6;
    --accent-secondary-hover: #7c3aed;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 8px;
}

h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.input-group, .option {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

input {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

input:focus {
    border-color: var(--accent-primary);
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 10px;
}

button {
    padding: 14px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, background 0.3s;
    color: white;
}

button:active {
    transform: scale(0.98);
}

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

.secondary-btn {
    background: var(--accent-secondary);
}
.secondary-btn:hover { background: var(--accent-secondary-hover); }

.hidden {
    display: none !important;
}

#loading {
    text-align: center;
    margin-top: 30px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255,255,255,0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

#resultContainer {
    margin-top: 30px;
    text-align: center;
    background: rgba(0,0,0,0.2);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

#resultImage {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 15px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.download-btn {
    display: inline-block;
    background: #10b981;
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    margin-top: 15px;
    transition: background 0.3s;
}

.download-btn:hover {
    background: #059669;
}

/* ====================== AGENTE QA ====================== */
.analyze-btn {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}
.analyze-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5); }
.analyze-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

#qaReportContainer {
    margin-top: 30px;
    animation: fadeIn 0.4s ease;
}

.qa-score-badge {
    text-align: center;
    padding: 20px;
    border-radius: 16px;
    margin-bottom: 20px;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}
.qa-score-badge.excelente { background: rgba(16, 185, 129, 0.15); border: 1px solid rgba(16, 185, 129, 0.4); color: #10b981; }
.qa-score-badge.aceptable { background: rgba(59, 130, 246, 0.15); border: 1px solid rgba(59, 130, 246, 0.4); color: #3b82f6; }
.qa-score-badge.problemas { background: rgba(245, 158, 11, 0.15); border: 1px solid rgba(245, 158, 11, 0.4); color: #f59e0b; }
.qa-score-badge.fallida { background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.4); color: #ef4444; }

.qa-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

.qa-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    transition: border-color 0.3s;
}
.qa-card.ok { border-color: rgba(16, 185, 129, 0.5); }
.qa-card.warn { border-color: rgba(245, 158, 11, 0.5); }
.qa-card.error { border-color: rgba(239, 68, 68, 0.5); }

.qa-card-title { font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.qa-card-value { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }

.qa-page-title {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
}

.qa-broken-list {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 14px;
    font-size: 0.78rem;
    color: #fca5a5;
    word-break: break-all;
}
.qa-broken-list p { margin: 0 0 6px; font-weight: 600; color: #ef4444; }
.qa-broken-list li { margin: 3px 0; list-style: disc; margin-left: 16px; }

#qaScreenshot {
    max-width: 100%;
    border-radius: 10px;
    margin-top: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* ====================== LANDING PAGE ====================== */
.landing-container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.hero-section {
    text-align: center;
    padding: 60px 20px 40px;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-section p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 16px 32px;
    border-radius: 50px;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.5);
    animation: pulse 2s infinite;
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 20px 30px -10px rgba(59, 130, 246, 0.6);
    animation: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    animation: fadeInUp 1s ease forwards 0.2s;
    opacity: 0;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    transition: transform 0.3s, background 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.06);
}

.feature-card.pro { border-top: 3px solid #10b981; }
.feature-card.con { border-top: 3px solid #ef4444; }

.feature-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

.feature-card.con .feature-list li::before {
    content: "✕";
    color: #ef4444;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.6); }
    70% { box-shadow: 0 0 0 15px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

@media (max-width: 768px) {
    .hero-section h1 { font-size: 2.5rem; }
    .hero-section p { font-size: 1rem; }
}