/* ===== CSS Variables ===== */
:root {
    --primary-color: #E8686A;
    --primary-dark: #5C0A2A;
    --primary-light: #FDE8E8;
    --primary-gradient: linear-gradient(135deg, #E8686A, #E8955A);
    --secondary-color: #1976D2;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --text-primary: #212121;
    --text-secondary: #555555;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-light: #F8F8FA;
    --bg-card: #FFFFFF;
    --border-color: #E8E8EC;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #FDE8E8 0%, #F5E6F0 30%, #E8EAF6 70%, #E0F2F1 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* ===== App Container ===== */
.app-container {
    max-width: 600px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
}

/* ===== Header ===== */
.header {
    background: var(--bg-white);
    padding: 14px 24px 10px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 6px;
}

.logo-endoflow-brand {
    display: flex;
    align-items: center;
    gap: 6px;
}

.endoflow-icon {
    width: 32px;
    height: 32px;
}

.endoflow-wordmark {
    font-family: 'Quicksand', 'Inter', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.logo {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.logo-sus {
    height: 38px;
}

.logo-divider {
    width: 1px;
    height: 30px;
    background: var(--border-color);
}

.header-subtitle {
    text-align: center;
}

.header-subtitle p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

/* ===== Progress Bar ===== */
.progress-container {
    padding: 18px 24px;
    background: var(--bg-light);
}

.progress-bar {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 14px;
}

.progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 25%;
}

.progress-steps {
    display: flex;
    justify-content: space-between;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    flex: 1;
}

.step-circle {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
}

.step.active .step-circle {
    background: var(--primary-color);
    color: white;
}

.step.completed .step-circle {
    background: var(--success-color);
    color: white;
}

.step span {
    font-size: 0.7rem;
    color: var(--text-light);
    text-align: center;
    transition: var(--transition);
}

.step.active span,
.step.completed span {
    color: var(--text-primary);
    font-weight: 500;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    padding: 24px;
}

.screen {
    display: none;
    animation: fadeIn 0.4s ease;
}

.screen.active {
    display: block;
}

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

.screen-content {
    max-width: 100%;
}

/* ===== Welcome Screen ===== */
.welcome-hero {
    text-align: center;
    margin-bottom: 28px;
}

.welcome-logo-large {
    margin-bottom: 16px;
}

.welcome-logo-large svg {
    animation: pulse 2.5s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.9; }
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.brand-highlight {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 12px;
}

.description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 24px;
    line-height: 1.7;
}

/* ===== Forms ===== */
.form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 12px;
}

label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: 2px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"] {
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-white);
    font-family: inherit;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

input::placeholder {
    color: var(--text-light);
}

/* ===== Buttons ===== */
.btn {
    padding: 16px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(232, 104, 106, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 104, 106, 0.45);
}

.btn-primary:disabled {
    background: var(--border-color);
    color: var(--text-light);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-whatsapp {
    background: #25D366;
    color: white;
    flex: 1;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
    background: #128C7E;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.btn-download {
    background: var(--secondary-color);
    color: white;
    flex: 1;
    box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

.btn-download:hover {
    background: #1565C0;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(25, 118, 210, 0.4);
}

/* ===== Consent Cards ===== */
.consent-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.consent-card:hover {
    border-color: var(--primary-light);
}

.consent-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    cursor: pointer;
    background: var(--bg-light);
}

.consent-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    font-size: 0.9rem;
}

.chevron {
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.chevron.rotated {
    transform: rotate(180deg);
}

.consent-summary {
    padding: 12px 16px;
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
}

.consent-summary p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.consent-full {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.consent-full.expanded {
    max-height: 600px;
    overflow-y: auto;
}

.consent-text {
    padding: 16px;
    background: #FAFAFA;
    border-top: 1px solid var(--border-color);
}

.consent-text h4 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.consent-text h5 {
    font-size: 0.9rem;
    margin-top: 16px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.consent-text p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.6;
}

.consent-checkbox {
    padding: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-white);
}

.consent-checkbox input[type="checkbox"] {
    width: 22px;
    height: 22px;
    accent-color: var(--primary-color);
    cursor: pointer;
    flex-shrink: 0;
    margin-top: 2px;
}

.consent-checkbox label {
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1.5;
}

/* ===== Questionnaire ===== */
.question-progress {
    margin-bottom: 24px;
}

.question-progress span {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.question-progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    margin-top: 8px;
    overflow: hidden;
}

.question-progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 4px;
    transition: width 0.4s ease;
}

.question-container {
    min-height: 300px;
}

.question-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    animation: slideIn 0.4s ease;
}

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

.question-domain {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-color);
    margin-bottom: 10px;
    padding: 4px 10px;
    background: var(--primary-light);
    border-radius: 20px;
    display: inline-block;
}

.question-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.5;
}

.question-emoji {
    font-size: 1.4rem;
    margin-right: 8px;
}

/* Scale Input */
.scale-container {
    margin-top: 16px;
}

.scale-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.scale-labels span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.scale-input {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
}

.scale-btn {
    width: 44px;
    height: 44px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-white);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

.scale-btn.selected {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Yes/No Input */
.yesno-container {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.yesno-btn {
    flex: 1;
    padding: 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

.yesno-btn.selected {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.question-navigation {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.question-navigation .btn {
    flex: 1;
}

/* ===== Results Screen ===== */
.results-content {
    padding-bottom: 40px;
}

.results-header {
    text-align: center;
    margin-bottom: 24px;
}

.results-logo {
    margin-bottom: 8px;
}

.results-header h2 {
    color: var(--primary-dark);
    font-size: 1.4rem;
}

.results-date {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* ===== Result Cards ===== */
.result-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.card-header-icon {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--bg-light);
}

.card-header-icon h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

/* Risk Card */
.risk-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
}

.risk-card.low {
    border-left: 5px solid var(--success-color);
    background: linear-gradient(135deg, #FFFFFF, #F1F8E9);
}

.risk-card.moderate {
    border-left: 5px solid var(--warning-color);
    background: linear-gradient(135deg, #FFFFFF, #FFF8E1);
}

.risk-card.high {
    border-left: 5px solid var(--danger-color);
    background: linear-gradient(135deg, #FFFFFF, #FFEBEE);
}

.risk-indicator {
    flex-shrink: 0;
}

.risk-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border: 4px solid var(--border-color);
}

.risk-card.low .risk-circle {
    border-color: var(--success-color);
    background: #E8F5E9;
}

.risk-card.moderate .risk-circle {
    border-color: var(--warning-color);
    background: #FFF3E0;
}

.risk-card.high .risk-circle {
    border-color: var(--danger-color);
    background: #FFEBEE;
}

.risk-score {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.risk-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.risk-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.risk-card.low .risk-info h3 { color: var(--success-color); }
.risk-card.moderate .risk-info h3 { color: var(--warning-color); }
.risk-card.high .risk-info h3 { color: var(--danger-color); }

.risk-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Explanation Card */
.explanation-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.explanation-content ul {
    padding-left: 20px;
    margin-bottom: 12px;
}

.explanation-content li {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.6;
}

.findings-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--bg-light);
}

.findings-list li:last-child {
    border-bottom: none;
}

/* Differential Diagnosis Card */
.differential-card {
    border-left: 4px solid var(--primary-color);
}

.differential-content p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.differential-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 12px 0;
}

.differential-item {
    padding: 12px 16px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
}

.differential-item h4 {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.differential-item p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.differential-note {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-top: 8px;
}

/* Steps Card */
.steps-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.step-item:hover {
    background: var(--primary-light);
}

.step-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-text {
    font-size: 0.88rem;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Doctor Guidance Card */
.doctor-card {
    border-left: 4px solid var(--secondary-color);
    background: linear-gradient(135deg, #FFFFFF, #E3F2FD);
}

.doctor-intro p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.doctor-tips h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.doctor-tip-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    border: 1px solid rgba(25, 118, 210, 0.1);
}

.tip-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.doctor-tip-item strong {
    display: block;
    font-size: 0.88rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.doctor-tip-item p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.doctor-tip-item em {
    color: var(--secondary-color);
    font-style: italic;
}

/* Ethics Card */
.ethics-card {
    background: linear-gradient(135deg, #FFFFFF, #F3E5F5);
    border-left: 4px solid var(--primary-dark);
}

.ethics-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 10px;
}

.ethics-content p:last-child {
    margin-bottom: 0;
}

/* Answers Card */
.answers-card {
    padding: 0;
    overflow: hidden;
}

.answers-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    cursor: pointer;
    background: var(--bg-light);
}

.answers-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.answers-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.answers-content.expanded {
    max-height: 1200px;
}

.answer-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.answer-item:last-child {
    border-bottom: none;
}

.answer-item.answer-positive {
    background: #FFF5F5;
}

.answer-domain {
    display: block;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--primary-color);
    margin-bottom: 3px;
}

.answer-question {
    font-size: 0.82rem;
    color: var(--text-secondary);
    flex: 1;
    padding-right: 12px;
    line-height: 1.4;
}

.answer-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: right;
    flex-shrink: 0;
}

.answer-value.positive {
    color: var(--danger-color);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    margin-bottom: 24px;
}

/* Disclaimer */
.disclaimer {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: #FFF8E1;
    border: 1px solid #FFE082;
    border-radius: var(--radius-md);
}

.disclaimer svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.disclaimer p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 6px;
}

.disclaimer-ref {
    font-size: 0.7rem !important;
    color: var(--text-light) !important;
    font-style: italic;
    margin-bottom: 0 !important;
}

/* ===== Footer ===== */
.footer {
    padding: 20px 24px;
    background: var(--primary-dark);
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-bottom: 8px;
}

.footer-brand span {
    font-family: 'Quicksand', 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
}

.footer p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 6px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.75rem;
}

.footer-links a:hover {
    color: white;
    text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .header {
        padding: 10px 16px 8px;
    }

    .endoflow-icon {
        width: 26px;
        height: 26px;
    }

    .endoflow-wordmark {
        font-size: 1.1rem;
    }

    .logo-sus {
        height: 30px;
    }

    .progress-container {
        padding: 14px 16px;
    }

    .step span {
        display: none;
    }

    .main-content {
        padding: 16px;
    }

    h2 {
        font-size: 1.25rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .scale-btn {
        width: 38px;
        height: 38px;
        font-size: 0.9rem;
    }

    .risk-card {
        flex-direction: column;
        text-align: center;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .doctor-tip-item {
        flex-direction: column;
        gap: 6px;
    }

    .tip-icon {
        margin-top: 0;
    }
}

/* ===== Print Styles ===== */
@media print {
    .header,
    .progress-container,
    .action-buttons,
    .footer {
        display: none;
    }

    .app-container {
        box-shadow: none;
    }

    .result-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}