:root {
    /* Paleta de Cores Premium - Harvard Crimson & Warm Ivory (Light Academic Theme) */
    --bg-base: #F7F3F1; /* Warm off-white, almost ivory */
    --bg-surface: #FFFFFF; /* Pure white surface */
    --border-color: #D4C5BF; /* Warm neutral charcoal-brown border */
    
    --text-primary: #1C1714; /* Dark charcoal-brown, high contrast readability */
    --text-secondary: #70605A; /* Muted charcoal-brown for secondary text */
    
    --primary-color: #A51C30; /* Official Harvard Crimson */
    --primary-hover: #801221; /* Deeper crimson for hovers */
    
    --success-color: #1A532C; /* Deep academic green */
    --success-bg: #EAF2EC; /* Light pastel green */
    
    --warning-color: #B45309; /* Sophisticated academic Amber */
    --warning-bg: #FEF3C7; /* Light amber */
    
    --info-color: #0F4C81; /* Academic slate blue */
    --info-bg: #E6F0FA; /* Light pastel blue */

    --gold-color: #C9981A; /* Official Harvard Gold */
    --gold-bg: #FDF6E2; /* Light gold background */

    --font-family: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background animado (Blobs) */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.12; /* Very soft opacity for light theme */
    animation: float 20s infinite alternate ease-in-out;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: var(--gold-color);
    bottom: -150px;
    right: -100px;
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

.glass-panel {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 10px 30px rgba(28, 23, 20, 0.05); /* Warm soft shadow */
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.logo h1 {
    color: var(--text-primary);
    font-weight: 700;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Input Section */
.input-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

label {
    font-weight: 500;
    color: var(--text-primary);
}

textarea {
    width: 100%;
    height: 200px;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(165, 28, 48, 0.15);
}

.primary-button {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    align-self: flex-end;
}

.primary-button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(165, 28, 48, 0.2);
}

.primary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* API Key Config Group */
.api-key-config-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 8px;
    padding: 16px;
    background: rgba(28, 23, 20, 0.02);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
}

.api-key-config-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.api-key-config-group label i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.api-key-options {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    position: relative;
    user-select: none;
    font-weight: 400;
}

.radio-option input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.radio-custom {
    height: 18px;
    width: 18px;
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: inline-block;
    position: relative;
    transition: all 0.3s ease;
}

.radio-option:hover input ~ .radio-custom {
    border-color: var(--primary-color);
}

.radio-option input:checked ~ .radio-custom {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.radio-custom:after {
    content: "";
    position: absolute;
    display: none;
    top: 5px;
    left: 5px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: white;
}

.radio-option input:checked ~ .radio-custom:after {
    display: block;
}

.radio-label {
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Custom Key Container & Password Field */
.custom-key-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.input-password-wrapper {
    position: relative;
    width: 100%;
}

.input-password-wrapper input {
    width: 100%;
    padding: 12px 48px 12px 16px;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.input-password-wrapper input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(165, 28, 48, 0.15);
}

.toggle-password-visibility {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: color 0.2s;
}

.toggle-password-visibility:hover {
    color: var(--primary-color);
}

.api-key-help-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.help-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-left: 4px;
    transition: color 0.2s;
}

.help-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Model Selection Group */
.model-selection-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 8px;
}

.model-selection-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.model-selection-group label i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.custom-select-wrapper {
    position: relative;
    width: 100%;
}

.custom-select-wrapper select {
    width: 100%;
    padding: 14px 16px;
    padding-right: 44px; /* Space for the custom arrow */
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-select-wrapper select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(165, 28, 48, 0.15);
}

.custom-select-wrapper select:hover {
    border-color: rgba(165, 28, 48, 0.5);
}

.select-arrow {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
    font-size: 1rem;
    transition: transform 0.25s ease;
}

.custom-select-wrapper select:focus ~ .select-arrow {
    transform: translateY(-50%) rotate(180deg);
    color: var(--primary-color);
}

/* Progress Section */
.progress-section {
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.progress-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: #FFFFFF;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(28, 23, 20, 0.02);
}

.progress-step.active {
    background: #FCF7F7; /* Subtle Crimson tinted background */
    border-color: var(--primary-color);
}

.progress-step.completed {
    background: #FAFAF9;
    border-color: var(--success-color);
}

.status-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.progress-step.active .status-icon {
    color: var(--primary-color);
    animation: pulse 1.5s infinite;
}

.progress-step.completed .status-icon {
    color: var(--success-color);
}

.step-content h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

/* Spin animation for loading icons */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.ph-spinner {
    animation: spin 1s linear infinite;
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(28, 23, 20, 0.05);
    border-radius: 999px;
    margin-top: 12px;
    overflow: hidden;
    display: none;
    border: 1px solid rgba(28, 23, 20, 0.03);
}

.progress-step.active .progress-bar-container,
.progress-step.completed .progress-bar-container {
    display: block;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--gold-color) 100%);
    border-radius: 999px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Results Section */
.results-section {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.results-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.results-title i {
    color: var(--gold-color); /* Harvard Gold for audit header icon */
}

.results-grid {
    display: flex;
    flex-direction: column;
    gap: 28px;
    width: 100%;
}

.result-card {
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-header i {
    font-size: 1.5rem;
}

.success-card .card-header i { color: var(--success-color); }
.warning-card .card-header i { color: var(--warning-color); }
.info-card .card-header i { color: var(--info-color); }

.card-header h3 {
    font-size: 1.1rem;
    flex-grow: 1;
}

.badge {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success { background: var(--success-bg); color: var(--success-color); }
.badge-warning { background: var(--warning-bg); color: var(--warning-color); }
.badge-info { background: var(--info-bg); color: var(--info-color); }

.card-body {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    width: 100%;
    padding: 4px 0;
}

/* Scrollbar Customization */
.card-body::-webkit-scrollbar { width: 6px; }
.card-body::-webkit-scrollbar-track { background: rgba(28, 23, 20, 0.03); border-radius: 10px; }
.card-body::-webkit-scrollbar-thumb { background: rgba(28, 23, 20, 0.15); border-radius: 10px; }
.card-body::-webkit-scrollbar-thumb:hover { background: rgba(28, 23, 20, 0.25); border-radius: 10px; }

/* List Items (Caixinhas de Artigo) */
.list-item {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    font-size: 0.9rem;
    box-shadow: 0 2px 6px rgba(28, 23, 20, 0.02);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 140px;
    transition: all 0.2s ease-in-out;
}

.list-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(28, 23, 20, 0.04);
    border-color: rgba(28, 23, 20, 0.15);
}

.list-item.clicked {
    border-color: #1A532C !important; /* Visited dark academic green border */
    box-shadow: 0 0 0 3px rgba(26, 83, 44, 0.12) !important;
}

.list-item-title {
    font-weight: 600;
    margin-bottom: 6px;
    line-height: 1.4;
    color: var(--text-primary);
}

.list-item-meta {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.action-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(28, 23, 20, 0.04);
    border: 1px solid rgba(28, 23, 20, 0.06);
    border-radius: 6px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.8rem;
    align-self: flex-start;
    transition: all 0.2s;
}

.action-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.success-card .action-link:hover { 
    background: var(--success-color); 
    border-color: var(--success-color); 
    color: white; 
}

.hidden {
    display: none !important;
}

/* ── Language Toggle ─────────────────────────────────────────────────────── */
.lang-toggle {
    position: fixed;
    top: 16px;
    right: 20px;
    z-index: 200;
    display: flex;
    align-items: center;
    gap: 2px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 4px 6px;
    box-shadow: 0 2px 12px rgba(28, 23, 20, 0.08);
}

.lang-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 999px;
    transition: all 0.2s ease;
    line-height: 1;
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
}

.lang-btn:hover:not(.active) {
    color: var(--primary-color);
}

.lang-divider {
    color: var(--border-color);
    font-size: 0.8rem;
    user-select: none;
    padding: 0 2px;
}