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

:root {
    /* Color Palette */
    --primary: #2196F3;
    --success: #4CAF50;
    --warning: #FFC107;
    --danger: #F44336;
    --purple: #9C27B0;
    
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e0e0e0;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.5rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
}

/* Base Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* App Container */
.app-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Header */
.header {
    background-color: var(--primary);
    color: white;
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.header__controls {
    display: flex;
    gap: var(--spacing-sm);
}

/* Navigation */
.nav {
    display: flex;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav::-webkit-scrollbar {
    display: none;
}

.nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    min-width: 80px;
    font-size: var(--font-size-sm);
}

.nav__item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav__item--active {
    color: var(--primary);
    background-color: var(--bg-primary);
    border-bottom: 2px solid var(--primary);
}

.nav__icon {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-content--active {
    display: block;
}

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

/* Dashboard */
.dashboard__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.dashboard__stats {
    display: flex;
    gap: var(--spacing-lg);
}

.stat {
    text-align: center;
}

.stat__value {
    display: block;
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--primary);
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Fermentation Grid */
.fermentation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.fermentation-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.fermentation-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--shadow);
}

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

.fermentation-card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.fermentation-card__type {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.fermentation-card__status {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.fermentation-card__status--active {
    background-color: var(--success);
    color: white;
}

.fermentation-card__status--completed {
    background-color: var(--primary);
    color: white;
}

.fermentation-card__status--paused {
    background-color: var(--warning);
    color: white;
}

.fermentation-card__timer {
    text-align: center;
    margin: var(--spacing-md) 0;
}

.timer__display {
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.timer__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.fermentation-card__info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.info-item {
    text-align: center;
}

.info-item__value {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
}

.info-item__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.fermentation-card__actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

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

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

.empty-state__icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

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

/* Forms */
.fermentation-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

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

.form-select--small {
    width: auto;
    padding: var(--spacing-sm) var(--spacing-md);
}

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

.checkbox {
    margin-right: var(--spacing-sm);
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    margin-right: var(--spacing-sm);
    position: relative;
    transition: var(--transition);
}

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

.checkbox:checked + .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

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

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

.btn--primary:hover:not(:disabled) {
    background-color: #1976D2;
    transform: translateY(-1px);
}

.btn--secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

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

.btn--success:hover:not(:disabled) {
    background-color: #388E3C;
}

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

.btn--warning:hover:not(:disabled) {
    background-color: #F57C00;
}

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

.btn--danger:hover:not(:disabled) {
    background-color: #D32F2F;
}

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

.btn--icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.btn--icon:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Profiles */
.profiles__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.profiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.profile-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.profile-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--shadow);
}

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

.profile-card__title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.profile-card__type {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.profile-card__actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* History */
.history__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.history__filters {
    display: flex;
    gap: var(--spacing-md);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.history-item:hover {
    background-color: var(--bg-tertiary);
}

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

.history-item__title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.history-item__date {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.history-item__info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

/* Achievements */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.achievement-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.achievement-card--unlocked {
    background-color: var(--success);
    color: white;
    transform: scale(1.02);
}

.achievement-card__icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.achievement-card__title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.achievement-card__description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.achievement-card--unlocked .achievement-card__description {
    color: rgba(255, 255, 255, 0.9);
}

/* 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;
}

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

.modal__content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease;
}

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

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.modal__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal__close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
}

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

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

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 80px;
    right: var(--spacing-lg);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 4px 16px var(--shadow);
    min-width: 300px;
    animation: slideInRight 0.3s ease;
}

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

.toast--success {
    border-left: 4px solid var(--success);
}

.toast--warning {
    border-left: 4px solid var(--warning);
}

.toast--error {
    border-left: 4px solid var(--danger);
}

.toast--info {
    border-left: 4px solid var(--primary);
}

.toast__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.toast__title {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.toast__close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
}

.toast__message {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.footer a {
    color: var(--primary);
    text-decoration: none;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header__title {
        font-size: var(--font-size-lg);
    }
    
    .main {
        padding: var(--spacing-md);
    }
    
    .dashboard__header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .dashboard__stats {
        align-self: stretch;
        justify-content: space-around;
    }
    
    .fermentation-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .profiles-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .history-item__info {
        grid-template-columns: 1fr 1fr;
    }
    
    .toast-container {
        right: var(--spacing-sm);
        left: var(--spacing-sm);
    }
    
    .toast {
        min-width: auto;
    }
    
    .modal__content {
        margin: var(--spacing-sm);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .nav__item {
        min-width: 60px;
        padding: var(--spacing-sm);
    }
    
    .nav__label {
        display: none;
    }
    
    .fermentation-card__actions {
        flex-direction: column;
    }
    
    .profile-card__actions {
        flex-direction: column;
    }
    
    .history-item__info {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .header,
    .nav,
    .footer,
    .modal,
    .toast-container {
        display: none !important;
    }
    
    .main {
        padding: 0;
    }
    
    .fermentation-card,
    .profile-card,
    .history-item {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }
}

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

/* Focus styles for keyboard navigation */
.btn:focus,
.form-input:focus,
.form-select:focus,
.form-textarea:focus,
.nav__item:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border: #000000;
        --shadow: rgba(0, 0, 0, 0.5);
    }
    
    [data-theme="dark"] {
        --border: #ffffff;
        --shadow: rgba(255, 255, 255, 0.3);
    }
}