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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #4f46e5;
    margin: 0;
}

.language-switcher {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 2px solid #e5e7eb;
    background: white;
    color: #6b7280;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    border-color: #4f46e5;
    color: #4f46e5;
}

.lang-btn.active {
    background: #4f46e5;
    border-color: #4f46e5;
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Card Styles */
.greeting-card,
.reflection-card,
.progress-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Greeting Section */
.greeting-section h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.greeting-section p {
    color: #6b7280;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.greeting-meta {
    display: flex;
    gap: 0.5rem;
    color: #4f46e5;
    font-weight: 500;
}

/* Reflection Form */
.reflection-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 2rem;
    text-align: center;
}

.reflection-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.form-group label {
    font-weight: 600;
    color: #374151;
    font-size: 1.1rem;
}

.form-group textarea {
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 120px;
    transition: border-color 0.2s ease;
}

.form-group textarea:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea::placeholder {
    color: #9ca3af;
}

/* Button Styles */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: #4f46e5;
    color: white;
}

.btn-primary:hover {
    background: #4338ca;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: #f3f4f6;
    color: #6b7280;
    border: 2px solid #e5e7eb;
}

.btn-secondary:hover {
    background: #e5e7eb;
    color: #374151;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

/* Progress Section */
.progress-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.stat-item {
    text-align: center;
    padding: 1rem;
    background: rgba(79, 70, 229, 0.1);
    border-radius: 0.75rem;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #4f46e5;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #6b7280;
    font-weight: 500;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem;
    text-align: center;
    color: #6b7280;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: auto;
}

.footer p {
    margin-bottom: 0.5rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    max-width: 400px;
    margin: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.3s ease;
}

.modal-content h3 {
    color: #10b981;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.modal-content p {
    color: #6b7280;
    margin-bottom: 2rem;
}

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

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

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading .btn {
    position: relative;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .main-content {
        padding: 1rem;
    }

    .greeting-card,
    .reflection-card,
    .progress-card {
        padding: 1.5rem;
    }

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

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

    .progress-stats {
        grid-template-columns: 1fr;
    }

    .lang-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .greeting-section h2 {
        font-size: 1.3rem;
    }

    .greeting-section p {
        font-size: 1rem;
    }

    .reflection-section h3 {
        font-size: 1.3rem;
    }

    .modal-content {
        margin: 0.5rem;
        padding: 1.5rem;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .form-actions,
    .language-switcher {
        display: none;
    }

    body {
        background: white;
    }

    .greeting-card,
    .reflection-card,
    .progress-card {
        background: white;
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }
}