/* Base Variables */
:root {
    --primary-bg: #1e1f22;
    --secondary-bg: #2b2d31;
    --accent-color: #5865f2;
    --accent-hover: #4752c4;
    --text-primary: #ffffff;
    --text-secondary: #b5bac1;
    --border-color: #393c43;
    --success-color: #3ba55c;
    --error-color: #ed4245;
    --nav-height: 60px;
    --bottom-nav-height: 65px;
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation Bar */
.nav-bar {
    height: var(--nav-height);
    padding: 0 1rem;
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.app-logo {
    font-size: 1.3rem;
    font-weight: bold;
    letter-spacing: -0.5px;
}

.app-logo span {
    color: var(--accent-color);
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-top: var(--nav-height);
    margin-bottom: var(--bottom-nav-height);
    overflow: hidden;
    position: relative;
}

/* Page Layout */
.page {
    display: none;
    height: 100%;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.page.active {
    display: block;
}

/* Suggestions Area */
.suggestions-wrapper {
    padding: 1rem;
    background: var(--primary-bg);
}

.suggestions-scroll {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding: 0.5rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.suggestions-scroll::-webkit-scrollbar {
    display: none;
}

.suggestion-card {
    flex: 0 0 160px;
    border-radius: 12px;
    overflow: hidden;
    background: var(--secondary-bg);
    cursor: pointer;
    transition: transform 0.2s ease;
}

.suggestion-card img {
    width: 100%;
    height: 100px;
    object-fit: cover;
}

.suggestion-card span {
    display: block;
    padding: 0.8rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    text-align: center;
}

.suggestion-card:active {
    transform: scale(0.98);
}

/* Message Area */
.message-area {
    padding: 1rem;
    display: flex;
    flex-direction: column-reverse;
    gap: 1rem;
    padding-bottom: 90px;
}

.message {
    background: var(--secondary-bg);
    border-radius: 12px;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

/* Image Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
    padding: 0.8rem;
}

.image-container {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 1;
    background: var(--secondary-bg);
}

.generated-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.8rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.image-container:hover .image-overlay,
.image-container:active .image-overlay {
    opacity: 1;
}

/* Input Area */
.input-area {
    position: fixed;
    bottom: var(--bottom-nav-height);
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(transparent, var(--primary-bg) 20%);
    backdrop-filter: blur(10px);
    z-index: 90;
}

.input-container {
    display: flex;
    gap: 0.8rem;
    background: var(--secondary-bg);
    padding: 0.8rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.prompt-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    padding: 0.5rem;
    resize: none;
    min-height: 24px;
    max-height: 120px;
}

.prompt-input:focus {
    outline: none;
}

.submit-button {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: none;
    background: var(--accent-color);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.submit-button:active {
    transform: scale(0.95);
    background: var(--accent-hover);
}

/* Gallery Page */
.page-header {
    padding: 1rem;
    background: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.timestamp {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.gallery-grid {
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.empty-gallery {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 50vh;
    color: var(--text-secondary);
    gap: 1rem;
}

.empty-gallery i {
    font-size: 3rem;
    opacity: 0.5;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--secondary-bg);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--border-color);
    z-index: 100;
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 0;
    transition: all 0.2s ease;
}

.bottom-nav-item.active {
    color: var(--accent-color);
}

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

.bottom-nav-item span {
    font-size: 0.8rem;
}

/* Settings Page */
.settings-container {
    padding: 1rem;
}

.settings-section {
    background: var(--secondary-bg);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.settings-header {
    padding: 1rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
}

.settings-item {
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

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

.settings-item select {
    background: var(--primary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 8px;
    outline: none;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    max-width: 90%;
    max-height: 90vh;
    position: relative;
}

.modal-image {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 12px;
}

.modal-controls {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
}

.modal-button {
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 8px;
    background: rgba(255,255,255,0.2);
    color: white;
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.modal-button:hover {
    background: rgba(255,255,255,0.3);
}

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

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(88, 101, 242, 0.1);
    border-radius: 12px;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid transparent;
    border-top-color: var(--accent-color);
    border-right-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Mobile Optimizations */
@media (max-width: 480px) {
    .image-grid {
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .settings-container {
        padding: 0.8rem;
    }
    
    .suggestion-card {
        flex: 0 0 140px;
    }
}

/* Safe Area Adjustments */
@supports (padding: max(0px)) {
    .bottom-nav {
        height: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
        padding-bottom: var(--safe-area-bottom);
    }
    
    .input-area {
        bottom: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
    }
}