/* CSS Variables for consistent theming */
:root {
    --color-primary: #8B4513;
    --color-secondary: #D2691E;
    --color-accent: #FF8C00;
    --color-warning: #FFA500;
    --color-success: #FFD700;
    
    --color-text: #333;
    --color-text-light: #666;
    --color-background: #f5f5f5;
    --color-white: #ffffff;
    --color-border: #ddd;
    --color-error: #e74c3c;
    
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --font-size-xl: 24px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    
    --header-height: 72px;
    --bottom-nav-height: 64px;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: var(--header-height);
    padding-bottom: var(--bottom-nav-height);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* Header - Fixed */
.header {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    box-shadow: var(--box-shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
}
.black-bar {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 30px;
background-color: #000000;
z-index: 1001;
}
.header__title {
    font-size: var(--font-size-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
}

.header__logo {
    height: 80px;
    width: auto;
    object-fit: contain;
    border-radius: 6px;
}

.header__text {
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header__icon {
    font-size: 1.5em;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background-color: var(--color-white);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 0 var(--spacing-sm);
    margin-bottom: 80px;
}

.bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    flex: 1;
    max-width: 100px;
    min-width: 60px;
}

.bottom-nav__item:hover {
    color: var(--color-primary);
    background-color: rgba(139, 69, 19, 0.05);
}

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

.bottom-nav__item--active .bottom-nav__icon {
    stroke-width: 2.5;
}

.bottom-nav__icon {
    width: 24px;
    height: 24px;
    transition: var(--transition);
}

.bottom-nav__label {
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-lg) 0;
    min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height));
}

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

.section--active {
    display: block;
}

.section__title {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.section__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* Dashboard Styles */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.stat-card__icon {
    font-size: 1.8em;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.stat-card--pending .stat-card__icon {
    background-color: rgba(255, 165, 0, 0.1);
}

.stat-card--overdue .stat-card__icon {
    background-color: rgba(231, 76, 60, 0.1);
}

.stat-card--completed .stat-card__icon {
    background-color: rgba(255, 215, 0, 0.1);
}

.stat-card--total .stat-card__icon {
    background-color: rgba(139, 69, 19, 0.1);
}

.stat-card__title {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 2px;
}

.stat-card__value {
    font-size: var(--font-size-large);
    font-weight: bold;
    color: var(--color-primary);
}

/* Alerts */
.alerts {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
}

.alerts__title {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.alerts__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid;
    background-color: #f8f9fa;
}

.alert--warning {
    border-left-color: var(--color-warning);
    background-color: rgba(255, 165, 0, 0.1);
}

.alert--error {
    border-left-color: var(--color-error);
    background-color: rgba(231, 76, 60, 0.1);
}

.alert__title {
    font-weight: bold;
    margin-bottom: var(--spacing-xs);
}

.alert__text {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

/* Pets List */
.pets__list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.pet-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.pet-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.pet-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.pet-card__name {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.pet-card__species {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
    text-transform: capitalize;
}

.pet-card__actions {
    display: flex;
    gap: var(--spacing-xs);
}

.pet-card__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.pet-card__detail {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

.pet-card__progress {
    margin-top: var(--spacing-md);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.progress-bar__fill {
    height: 100%;
    background-color: var(--color-success);
    transition: width 0.3s ease;
}

/* Vaccines List */
.vaccines__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.vaccine-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--color-border);
}

.vaccine-card--pending {
    border-left-color: var(--color-warning);
}

.vaccine-card--completed {
    border-left-color: var(--color-success);
}

.vaccine-card--overdue {
    border-left-color: var(--color-error);
}

.vaccine-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.vaccine-card__name {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.vaccine-card__pet {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

.vaccine-card__status {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-small);
    font-weight: bold;
    text-transform: uppercase;
    flex-shrink: 0;
}

.vaccine-card__status--pending {
    background-color: rgba(255, 165, 0, 0.1);
    color: var(--color-warning);
}

.vaccine-card__status--completed {
    background-color: rgba(255, 215, 0, 0.1);
    color: #b8860b;
}

.vaccine-card__status--overdue {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--color-error);
}

.vaccine-card__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.vaccine-card__detail {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

.vaccine-card__actions {
    margin-top: var(--spacing-md);
}

/* Timeline */
.timeline {
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: var(--spacing-lg);
    width: 2px;
    height: 100%;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: flex-start;
    padding-left: calc(var(--spacing-lg) * 2 + 10px);
}

.timeline-item__content {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    width: 100%;
}

.timeline-item__marker {
    position: absolute;
    left: var(--spacing-lg);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--color-white);
    border: 3px solid var(--color-border);
    transform: translateX(-50%);
    z-index: 10;
}

.timeline-item--completed .timeline-item__marker {
    background-color: var(--color-success);
    border-color: var(--color-success);
}

.timeline-item--pending .timeline-item__marker {
    background-color: var(--color-warning);
    border-color: var(--color-warning);
}

.timeline-item--overdue .timeline-item__marker {
    background-color: var(--color-error);
    border-color: var(--color-error);
}

/* Forms */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form__label {
    font-weight: bold;
    color: var(--color-text);
}

.form__input,
.form__select,
.form__textarea {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: var(--transition);
    width: 100%;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(139, 69, 19, 0.2);
}

.form__textarea {
    resize: vertical;
    min-height: 80px;
}

.form__checkbox {
    width: 18px;
    height: 18px;
    margin-right: var(--spacing-sm);
    vertical-align: middle;
    cursor: pointer;
}

.form__label--inline {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

.form__actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-md);
}

/* Filters */
.vaccine-filters,
.timeline-filters {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.vaccine-filters .form__select,
.timeline-filters .form__select {
    min-width: 150px;
    flex: 1;
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: bold;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: var(--transition);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

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

.btn--secondary:hover:not(:disabled) {
    background-color: #ccc;
}

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

.btn--success:hover:not(:disabled) {
    background-color: #e6c200;
}

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

.btn--warning:hover:not(:disabled) {
    background-color: #e6940a;
}

.btn--small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-small);
}

.btn__icon {
    font-size: 1.2em;
}

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

.modal--active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal__content {
    background: var(--color-white);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 500px;
    max-height: calc(100vh - var(--spacing-xl) * 2);
    overflow-y: auto;
    animation: slideIn 0.3s ease-in-out;
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-white);
}

.modal__title {
    font-size: var(--font-size-large);
    color: var(--color-primary);
}

.modal__close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--color-text-light);
    padding: var(--spacing-xs);
    line-height: 1;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

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

.modal .form {
    padding: var(--spacing-lg);
}

/* Loading */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.loading-overlay--active {
    display: flex;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--color-white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    color: var(--color-white);
    margin-top: var(--spacing-md);
    font-size: var(--font-size-large);
}

/* Toast */
.toast-container {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-md));
    right: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 1500;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--box-shadow);
    border-left: 4px solid;
    animation: slideInRight 0.3s ease-in-out;
    pointer-events: auto;
    max-width: 400px;
    margin-left: auto;
}

.toast--success {
    border-left-color: var(--color-success);
}

.toast--error {
    border-left-color: var(--color-error);
}

.toast--warning {
    border-left-color: var(--color-warning);
}

.toast__title {
    font-weight: bold;
    margin-bottom: var(--spacing-xs);
}

.toast__message {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-bottom: 60px;
}

.footer__text {
    font-size: var(--font-size-small);
}

.footer__link {
    color: var(--color-success);
    text-decoration: none;
}

.footer__link:hover {
    text-decoration: underline;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

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

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

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* Desktop Styles */
@media (min-width: 768px) {
    :root {
        --bottom-nav-height: 70px;
    }
    
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-card__icon {
        font-size: 2.5em;
        width: 60px;
        height: 60px;
    }
    
    .stat-card__title {
        font-size: var(--font-size-small);
    }
    
    .stat-card__value {
        font-size: var(--font-size-xl);
    }
    
    .pets__list {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .bottom-nav {
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .bottom-nav__item {
        flex-direction: row;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-lg);
        max-width: none;
    }
    
    .bottom-nav__icon {
        width: 20px;
        height: 20px;
    }
    
    .bottom-nav__label {
        font-size: var(--font-size-small);
    }
    
    .toast-container {
        left: auto;
        right: var(--spacing-lg);
        max-width: 400px;
    }
    
    /* Timeline desktop */
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .timeline-item {
        padding-left: 0;
        width: 50%;
    }
    
    .timeline-item:nth-child(odd) {
        margin-left: auto;
        padding-left: calc(var(--spacing-lg) + 10px);
    }
    
    .timeline-item:nth-child(even) {
        padding-right: calc(var(--spacing-lg) + 10px);
        text-align: right;
    }
    
    .timeline-item:nth-child(even) .timeline-item__content {
        text-align: left;
    }
    
    .timeline-item__marker {
        left: auto;
        right: auto;
    }
    
    .timeline-item:nth-child(odd) .timeline-item__marker {
        left: 0;
    }
    
    .timeline-item:nth-child(even) .timeline-item__marker {
        right: 0;
        left: auto;
        transform: translateX(50%);
    }
}

/* Large Desktop */
@media (min-width: 1024px) {
    .header__title {
        font-size: calc(var(--font-size-xl) * 1.2);
    }
    
    .header__logo {
        height: 100px;
    }
    .main {
        padding: var(--spacing-xl) 0;
    }
    
    .section__title {
        font-size: calc(var(--font-size-xl) * 1.1);
    }
}

/* Small Mobile Adjustments */
@media (max-width: 374px) {
    :root {
        --font-size-base: 14px;
        --spacing-md: 12px;
        --spacing-lg: 16px;
    }
    
    .header__title {
        font-size: var(--font-size-large);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .bottom-nav__label {
        font-size: 10px;
    }
    
    .bottom-nav__icon {
        width: 20px;
        height: 20px;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .bottom-nav,
    .btn,
    .modal {
        display: none !important;
    }
    
    body {
        padding: 0;
    }
    
    .main {
        padding: 0;
    }
    
    .section {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .pet-card,
    .vaccine-card {
        box-shadow: none;
        border: 1px solid var(--color-border);
        page-break-inside: avoid;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --color-text: #000;
        --color-background: #fff;
        --color-border: #000;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

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

/* Safe area for devices with notch */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .bottom-nav {
        padding-bottom: env(safe-area-inset-bottom);
        height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    }
    
    body {
        padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    }
}