/* CSS Reset e Variáveis */
:root {
    --primary-color: #7868E6;
    --secondary-color: #B8B5FF;
    --accent-color: #FFB4B4;
    --background-light: #EDEEF7;
    --background-accent: #E4FBFF;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --white: #ffffff;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--background-light);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(184, 181, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(228, 251, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(255, 180, 180, 0.1) 0%, transparent 50%);
    min-height: 100vh;
    position: relative;
}

/* Paper Texture Effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.1) 2px,
            rgba(255, 255, 255, 0.1) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.1) 2px,
            rgba(255, 255, 255, 0.1) 4px
        );
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 1.5rem 0;
    text-align: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.05"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.header__content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.header__logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.header__text {
    text-align: center;
}

.header__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.header__icon {
    width: 3rem;
    height: 3rem;
    stroke: currentColor;
    fill: none;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.header__subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}


/* Main Content */
.main {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
    padding-top: 180px; /* Espaço para header fixo */
    padding-bottom: 100px; /* Espaço para bottom-nav */
}

.section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.section--active {
    display: block;
}

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

.section__header {
    text-align: center;
    margin-bottom: 2rem;
}

.section__title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.section__description {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-bar__label {
    font-weight: 600;
    color: var(--text-dark);
}

.filter-bar__select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--secondary-color);
    border-radius: var(--border-radius);
    background: var(--white);
    color: var(--text-dark);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-bar__select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(120, 104, 230, 0.2);
}

/* Exercises Grid */
.exercises-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.exercise-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.exercise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.exercise-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--secondary-color);
}

.exercise-card__header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.exercise-card__icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-accent);
    border-radius: 50%;
}

.exercise-card__icon svg {
    width: 2rem;
    height: 2rem;
    stroke: var(--primary-color);
    fill: none;
}

.exercise-card__title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
}

.exercise-card__description {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.exercise-card__details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.exercise-detail {
    text-align: center;
}

.exercise-detail__label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.exercise-detail__value {
    font-weight: 600;
    color: var(--primary-color);
}

.exercise-card__trimesters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.trimester-tag {
    background: var(--secondary-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.exercise-card__button {
    width: 100%;
    padding: 0.8rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.exercise-card__button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

/* Timer Container */
.timer-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
}

.timer-display {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--background-accent);
    border-radius: var(--border-radius);
}

.timer-display__time {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-family: 'Courier New', monospace;
}

.timer-display__exercise {
    font-size: 1.2rem;
    color: var(--text-light);
    font-weight: 500;
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    text-align: center;
    justify-content: center;
    min-width: 120px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

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

.btn--primary:hover:not(:disabled) {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.btn--secondary {
    background: var(--text-light);
    color: var(--white);
}

.btn--secondary:hover:not(:disabled) {
    background: var(--text-dark);
    transform: translateY(-2px);
}

.btn--danger {
    background: var(--accent-color);
    color: var(--white);
}

.btn--danger:hover:not(:disabled) {
    background: #ff9999;
    transform: translateY(-2px);
}

.btn--outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn__icon {
    width: 1.1rem;
    height: 1.1rem;
    stroke: currentColor;
    fill: none;
}

/* Intensity Monitor */
.intensity-monitor {
    margin-bottom: 2rem;
}

.intensity-monitor__title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.intensity-scale {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.intensity-scale__slider {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--background-light);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.intensity-scale__slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.intensity-scale__slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.intensity-scale__value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 40px;
    text-align: center;
}

.intensity-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Symptoms Check */
.symptoms-check {
    margin-bottom: 2rem;
}

.symptoms-check__title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.symptoms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.checkbox-label:hover {
    background: var(--background-light);
}

.checkbox-input {
    display: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--secondary-color);
    border-radius: 4px;
    position: relative;
    transition: var(--transition);
}

.checkbox-input:checked + .checkbox-custom {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-input:checked + .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-weight: bold;
    font-size: 14px;
}

/* History */
.history-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-label {
    font-weight: 600;
    color: var(--text-dark);
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--secondary-color);
    border-radius: var(--border-radius);
    background: var(--white);
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(120, 104, 230, 0.2);
}

.history-list {
    margin-bottom: 2rem;
}

.history-item {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.history-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.history-item__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.history-item__title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.history-item__date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.history-item__details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.history-detail {
    text-align: center;
}

.history-detail__label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.history-detail__value {
    font-weight: 600;
    color: var(--primary-color);
}

.history-item__symptoms {
    margin-top: 1rem;
}

.history-item__symptoms-title {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.history-item__symptoms-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.symptom-tag {
    background: var(--accent-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* Stats Summary */
.stats-summary {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
}

.stats-summary__title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--background-accent);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card__value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-card__label {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.faq-item__question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-item__question:hover {
    background: var(--background-light);
}

.faq-item__icon {
    font-size: 1.2rem;
    transition: var(--transition);
}

.faq-item--active .faq-item__icon {
    transform: rotate(180deg);
}

.faq-item__answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item--active .faq-item__answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}

.faq-item__answer p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--background-light);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 0.5rem 0;
}

.bottom-nav__container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 0 1rem;
}

.bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-light);
    
    margin-bottom: 60px;
}

.bottom-nav__item:hover {
    background: var(--background-light);
    color: var(--primary-color);
}

.bottom-nav__item--active {
    color: var(--primary-color);
    background: var(--background-accent);
}

.bottom-nav__icon {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
}

.bottom-nav__label {
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    margin-bottom: 100px; /* Espaço para bottom-nav */
}

.footer__text {
    font-size: 1rem;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header {
        padding: 1rem 0;
    }
    
    .header__content {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .header__logo {
        width: 70px;
        height: 70px;
    }
    
    .header__title {
        font-size: 1.8rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .main {
        padding-top: 140px;
    }
    
    
    .section__title {
        font-size: 1.5rem;
    }
    
    .timer-display__time {
        font-size: 3rem;
    }
    
    .timer-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .exercises-grid {
        grid-template-columns: 1fr;
    }
    
    .history-filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .bottom-nav__container {
        padding: 0 0.5rem;
    }
    
    .bottom-nav__item {
        min-width: 50px;
        padding: 0.25rem;
    }
    
    .bottom-nav__label {
        font-size: 0.7rem;
    }
    
    .bottom-nav__icon {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.8rem 0;
    }
    
    .header__logo {
        width: 60px;
        height: 60px;
    }
    
    .header__title {
        font-size: 1.4rem;
    }
    
    .main {
        padding-top: 120px;
    }
    
    .timer-display__time {
        font-size: 2.5rem;
    }
    
    .exercise-card__details {
        grid-template-columns: 1fr;
    }
    
    .intensity-scale {
        flex-direction: column;
        text-align: center;
    }
    
    .symptoms-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading States */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid var(--background-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Alert Messages */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert--success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert--warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert--error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus States */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
input:focus,
select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(120, 104, 230, 0.3);
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --secondary-color: #4B0082;
        --text-dark: #000000;
        --text-light: #333333;
    }
}

/* FAQ Icons */
.faq-item__icon-question {
    margin-right: 0.5rem;
    width: 1.2rem;
    height: 1.2rem;
    stroke: var(--primary-color);
    fill: none;
}

.faq-item__icon-question svg {
    width: 1.2rem;
    height: 1.2rem;
    stroke: var(--primary-color);
    fill: none;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}