/* Variables CSS pour la palette naturelle */
:root {
    --primary-green: #8B9A6B;
    --light-green: #A8B88A;
    --dark-green: #6B7A4F;
    --beige: #E8D5B7;
    --light-beige: #F5F0E8;
    --dark-beige: #D4C2A5;
    --sage: #9CAF88;
    --cream: #F9F6F1;
    --earth: #8B7355;
    --shadow: rgba(107, 122, 79, 0.15);
    --text-dark: #3A3A3A;
    --text-light: #6B6B6B;
    --success: #7FB069;
    --warning: #E9B872;
    --border-radius: 12px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--cream) 0%, var(--light-beige) 100%);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* Layout principal */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--beige);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-green);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

#nav-authenticated {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: #3A3A3A;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: rgba(139, 154, 107, 0.1);
    color: var(--primary-green);
}

.nav-link i {
    font-size: 1.2rem;
}

.main {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* Pages */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Authentification */
.auth-container {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    max-width: 400px;
    margin: var(--spacing-xl) auto;
    box-shadow: 0 10px 30px var(--shadow);
    border: 1px solid var(--beige);
}

.auth-container h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-green);
}

.subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.auth-tabs {
    display: flex;
    margin-bottom: var(--spacing-lg);
    background: var(--light-beige);
    border-radius: var(--border-radius);
    padding: 4px;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: calc(var(--border-radius) - 4px);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: var(--text-light);
}

.tab-btn.active {
    background: white;
    color: var(--primary-green);
    box-shadow: 0 2px 8px var(--shadow);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form input {
    width: 100%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--beige);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: var(--cream);
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-green);
}

/* Boutons */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

.btn-primary:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

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

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

.btn-full {
    width: 100%;
}

/* Page principale */
.welcome-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    border: 1px solid var(--beige);
}

.welcome-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-green);
}

.streak-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.streak-count {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--earth);
}

.notification-prompt {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(232, 213, 183, 0.3);
    border-radius: var(--border-radius);
    border: 1px solid var(--beige);
    text-align: center;
}

.notification-prompt p {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

/* Progress ring */
.progress-ring {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.progress-svg {
    transform: rotate(-90deg);
}

.progress-text {
    position: absolute;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-green);
}

/* Sections */
.tasks-section, .rewards-section {
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--beige);
}

.tasks-section h3, .rewards-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-green);
    font-size: 1.3rem;
}

/* Liste des tâches */
.tasks-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.task-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--cream);
    border-radius: var(--border-radius);
    border: 2px solid var(--beige);
    transition: all 0.3s ease;
}

.task-item:hover {
    border-color: var(--sage);
    transform: translateY(-1px);
}

.task-item.completed {
    border-color: var(--success);
    background: rgba(127, 176, 105, 0.1);
}

.task-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--sage);
    border-radius: 50%;
    margin-right: var(--spacing-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.task-checkbox.checked {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.task-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.task-icon {
    font-size: 1.5rem;
}

.task-details h4 {
    margin: 0;
    color: var(--text-dark);
}

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

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

.task-delete {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.task-delete:hover {
    background: rgba(255, 0, 0, 0.1);
    color: #ff4444;
}

/* Grille des récompenses */
.rewards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.reward-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--cream);
    border-radius: var(--border-radius);
    border: 2px solid var(--beige);
    transition: all 0.3s ease;
}

.reward-item.unlocked {
    border-color: var(--success);
    background: rgba(127, 176, 105, 0.1);
}

.reward-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.reward-item.unlocked .reward-icon {
    filter: none;
}

.reward-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
}

.modal-content input,
.modal-content select {
    width: 100%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--beige);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--cream);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.modal-actions .btn {
    flex: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main {
        padding: var(--spacing-md);
    }

    .header {
        padding: var(--spacing-md);
    }

    .auth-container {
        margin: var(--spacing-md) auto;
        padding: var(--spacing-lg);
    }

    .welcome-section h2 {
        font-size: 1.5rem;
    }

    .streak-info {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .tasks-section, .rewards-section {
        padding: var(--spacing-md);
    }

    .task-item {
        padding: var(--spacing-sm);
    }

    .rewards-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

@media (max-width: 480px) {
    .task-info {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

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

    .modal-actions {
        flex-direction: column;
    }
}

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

.task-item, .reward-item {
    animation: slideIn 0.5s ease-out;
}

/* PWA styles */
@media (display-mode: standalone) {
    .header {
        padding-top: env(safe-area-inset-top, var(--spacing-md));
    }
}

/* États de chargement */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-green);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}