/* CSS Variables for consistent theming */
:root {
    --primary-color: #8B4513;
    --secondary-color: #D2691E;
    --accent-color: #FF8C00;
    --highlight-color: #FFA500;
    --light-color: #FFD700;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f3f4f6;
    --bg-light: #f8f9fa;
    --surface-color: #ffffff;
    --surface-muted: #f5f6f8;
    --border-color: #ddd;
    --error-color: #dc3545;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body.theme-light {
    color-scheme: light;
}

body.theme-dark {
    --text-color: #f8f9fa;
    --text-light: #adb5bd;
    --bg-color: #181b1f;
    --bg-light: #21252b;
    --surface-color: #1f2329;
    --surface-muted: #2b3036;
    --border-color: #353b43;
    --box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: nowrap;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 20px 0;
    box-shadow: var(--box-shadow);
    position: relative;
}

.header__brand {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 0;
}

.title__icon {
    margin-right: 8px;
}

.header__title {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.header__logo {
    height: 38px;
    width: auto;
    display: block;
}

.header__subtitle {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Navigation Styles */
.nav {
    background: color-mix(in srgb, var(--surface-color) 92%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--box-shadow);
}

.nav__list {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px 0;
}

.nav__button {
    background: none;
    border: 2px solid var(--border-color);
    padding: 12px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.nav__button i {
    font-size: 1rem;
}

i.fa-solid,
i.fa-regular,
i.fa-light,
i.fa-thin,
i.fa-duotone,
i.fa-brands {
    line-height: 1;
    display: inline-block;
}

.nav__button:hover {
    background-color: var(--surface-muted);
    border-color: var(--secondary-color);
}

.nav__button:active {
    transform: translateY(1px);
}

.nav__button--active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Main Content */
.main {
    flex: 1;
    padding: 30px 0;
    gap: 24px;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.section--active {
    display: block;
}

.section__title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 24px;
    text-align: center;
}

.section__hint {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-color);
    border-radius: var(--border-radius);
    padding: 12px 14px;
    margin-bottom: 18px;
    color: var(--text-light);
    box-shadow: var(--box-shadow);
}

.section__hint strong {
    color: var(--text-color);
    display: block;
    margin-bottom: 6px;
}

.hint-list {
    list-style: disc;
    margin: 0 0 0 18px;
    padding: 0;
    display: grid;
    gap: 6px;
}

.hint-list li {
    line-height: 1.4;
}

/* Form Styles */
.form {
    background: var(--surface-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    max-width: 600px;
    margin: 0 auto;
}

.form__group {
    margin-bottom: 22px;
}

.form__label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form__input,
.form__select,
.form__textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--surface-color);
    color: var(--text-color);
}

.form__input:disabled,
.form__select:disabled,
.form__textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.form__textarea {
    min-height: 100px;
    resize: vertical;
}

/* Consistency Scale */
.consistency-scale {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 15px 0;
}

.consistency-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
    min-width: 120px;
    min-height: 110px;
    text-align: center;
    gap: 8px;
}

.consistency-item:hover {
    border-color: var(--accent-color);
    background-color: var(--surface-muted);
}

.consistency-item--selected {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

.consistency-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.consistency-icon--1 { background-color: #87CEEB; }
.consistency-icon--2 { background-color: #DDA0DD; }
.consistency-icon--3 { background-color: var(--light-color); }
.consistency-icon--4 { background-color: var(--highlight-color); }
.consistency-icon--5 { background-color: var(--secondary-color); }

/* Button Styles */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    min-height: 48px;
}

#addPetBtn {
    margin-top: 10px;
}

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

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

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

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

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease-in-out;
    backdrop-filter: blur(2px);
}

.modal__content {
    background-color: var(--surface-color);
    margin: 5% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: slideIn 0.3s ease-in-out;
}

.modal__close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.modal__close:hover {
    color: var(--text-color);
}

/* Evaluation Results */
.evaluation-results {
    background: var(--surface-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
}

.evaluation-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    background: var(--surface-muted);
    transition: var(--transition);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.evaluation-card:hover {
    box-shadow: var(--box-shadow);
    transform: translateY(-2px);
}

.evaluation-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

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

.evaluation-card__status {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.evaluation-card__status--normal {
    background-color: var(--success-color);
    color: white;
}

.evaluation-card__status--warning {
    background-color: var(--warning-color);
    color: var(--text-color);
}

.evaluation-card__status--alert {
    background-color: var(--error-color);
    color: white;
}

.evaluation-card__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px 14px;
}

.evaluation-card__content p {
    margin: 0;
    padding: 10px 12px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: center;
    line-height: 1.45;
}

.evaluation-card__content p strong {
    color: var(--text-color);
    font-weight: 700;
    font-size: 0.95rem;
}

.evaluation-card__content p:last-child {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.08);
}

/* Alerts List */
.alerts-list {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.alert-item {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 18px;
}

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

.alert-item__icon {
    font-size: 1.5rem;
    width: 40px;
    text-align: center;
}

.alert-item__content {
    flex: 1;
}

.alert-item__title {
    font-weight: 600;
    margin-bottom: 5px;
}

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

.alert-item__time {
    color: var(--text-light);
    font-size: 0.8rem;
}

.alert-item--high {
    background-color: rgba(220, 53, 69, 0.1);
    border-left: 4px solid var(--error-color);
}

.alert-item--medium {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 4px solid var(--warning-color);
}

.alert-item--low {
    background-color: rgba(40, 167, 69, 0.1);
    border-left: 4px solid var(--success-color);
}

/* Patterns */
.patterns-container {
    background: var(--surface-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.patterns-filters {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.patterns-filters .form__select {
    flex: 1;
    min-width: 200px;
}

.patterns-chart {
    background: var(--surface-muted);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 30px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.patterns-history {
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
    padding-right: 6px;
}

.patterns-history::-webkit-scrollbar {
    width: 6px;
}

.patterns-history::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 999px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

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

.history-item__icon {
    font-size: 1.5rem;
    width: 40px;
    text-align: center;
}

.history-item__icon i,
.alert-item__icon i,
.evaluation-card__title i {
    color: var(--primary-color);
}

.history-item__content {
    flex: 1;
}

.history-item__title {
    font-weight: 600;
    margin-bottom: 5px;
}

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

.history-item__time {
    color: var(--text-light);
    font-size: 0.8rem;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: auto;
}

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

.footer__link {
    color: white;
    font-weight: 700;
    text-decoration: none;
    padding-bottom: 1px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer__link:hover,
.footer__link:focus-visible {
    opacity: 1;
    text-shadow: 0 0 6px rgba(255, 255, 255, 0.4);
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 600;
    z-index: 1001;
    transform: translateX(400px);
    transition: var(--transition);
    max-width: 300px;
    opacity: 0;
}

.notification--show {
    transform: translateX(0);
    opacity: 1;
}

.notification--success {
    background-color: var(--success-color);
}

.notification--error {
    background-color: var(--error-color);
}

.notification--warning {
    background-color: var(--warning-color);
    color: var(--text-color);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header__title {
        font-size: 1.5rem;
    }
    
    .nav__list {
        gap: 5px;
    }
    
    .nav__button {
        padding: 10px 15px;
        font-size: 0.8rem;
    }
    
    .form {
        padding: 20px;
    }
    
    .consistency-scale {
        gap: 5px;
    }
    
    .consistency-item {
        padding: 10px;
        min-width: 60px;
    }
    
    .consistency-item span {
        font-size: 0.8rem;
    }
    
    .patterns-filters {
        flex-direction: column;
    }
    
    .patterns-filters .form__select {
        min-width: auto;
    }
    
    .modal__content {
        width: 95%;
        margin: 10% auto;
        padding: 20px;
    }
    
    .evaluation-card__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .alert-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .history-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 15px 0;
    }
    
    .header__title {
        font-size: 1.3rem;
    }
    
    .header__subtitle {
        font-size: 0.9rem;
    }
    
    .nav__button {
        padding: 8px 12px;
        font-size: 0.7rem;
    }
    
    .section__title {
        font-size: 1.5rem;
    }
    
    .form {
        padding: 15px;
    }
    
    .consistency-scale {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }
    
    .consistency-item {
        width: 100%;
        flex-direction: row;
        justify-content: flex-start;
        gap: 12px;
    }
    
    .notification {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.14);
    border: 2px solid rgba(255, 255, 255, 0.35);
    color: white;
    border-radius: 999px;
    padding: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 700;
    line-height: 1;
    margin-left: auto;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.22);
}

.theme-toggle__icon {
    font-size: 1.2rem;
}

.theme-dark .theme-toggle {
    border-color: rgba(255, 255, 255, 0.3);
}

/* Print styles */
@media print {
    .header,
    .nav,
    .footer,
    .notification {
        display: none;
    }
    
    .main {
        padding: 0;
    }
    
    .section {
        display: block !important;
        page-break-after: always;
    }
    
    .section:last-child {
        page-break-after: avoid;
    }
    
    .form,
    .evaluation-results,
    .alerts-list,
    .patterns-container {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* Accessibility improvements */
.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 indicators */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }
    
    .btn,
    .form__input,
    .form__select,
    .form__textarea {
        border-width: 2px;
    }
}

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