/* AI Image Analyzer - Dark Theme Styles */

/* ========== CSS Variables ========== */
:root {
    --bg-primary: #0a0a14;
    --bg-secondary: #12121f;
    --bg-card: #1a1a30;
    --bg-card-hover: #222240;
    --accent-blue: #0088ff;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06d6a0;
    --accent-orange: #ff6b35;
    --accent-pink: #ff3388;
    --accent-yellow: #ffd23f;
    --text-primary: #ffffff;
    --text-secondary: #aaaacc;
    --text-muted: #666688;
    --border-color: #2a2a44;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Reset & Base ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== Gradient Background ========== */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: radial-gradient(ellipse at 50% 0%, rgba(0, 136, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ========== Layout ========== */
.app-container {
    position: relative;
    z-index: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 20px 16px 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== Header ========== */
.app-header {
    text-align: center;
    padding: 40px 0 32px;
}

.app-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.app-logo .icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.app-logo-img {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    object-fit: cover;
    flex-shrink: 0;
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 15px;
}

.model-badge {
    display: inline-block;
    margin-top: 10px;
    padding: 4px 14px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 20px;
    font-size: 12px;
    color: var(--accent-purple);
    font-weight: 500;
}

/* ========== Upload Zone ========== */
.upload-section {
    margin-bottom: 24px;
}

.upload-zone {
    position: relative;
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    overflow: hidden;
}

.upload-zone:hover {
    border-color: var(--accent-blue);
    background: rgba(0, 136, 255, 0.03);
}

.upload-zone.dragover {
    border-color: var(--accent-cyan);
    background: rgba(6, 214, 160, 0.05);
    transform: scale(1.01);
}

.upload-zone.has-image {
    padding: 8px;
    border-style: solid;
    border-color: var(--border-color);
    cursor: default;
}

.upload-zone .upload-icon {
    display: none;
    font-size: 48px;
    margin-bottom: 12px;
}

.upload-zone .upload-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.upload-zone .upload-hint {
    color: var(--text-muted);
    font-size: 13px;
}

.upload-zone .upload-btn {
    display: inline-block;
    margin-top: 16px;
    padding: 10px 28px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.upload-zone .upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 136, 255, 0.3);
}

/* Upload button row - two buttons side by side on desktop */
.upload-btn-row {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
}

/* Hide camera button on desktop */
.upload-zone .camera-btn {
    display: none !important;
}

.upload-zone .upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 28px;
    border: none;
    border-radius: 25px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.upload-zone .upload-btn span {
    font-size: 22px;
}

/* Gallery button - gradient background */
.upload-zone .gallery-btn {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
}
.upload-zone .gallery-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 136, 255, 0.3);
}

/* Camera button - orange background */
.upload-zone .camera-btn {
    background: linear-gradient(135deg, #ff6b35, #ff8c42);
    color: white;
    border: none;
}

.upload-zone .camera-btn:hover {
    background: linear-gradient(135deg, #ff8c42, #ffa55c);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}

.upload-zone .mobile-hint {
    display: none;
    margin-top: 10px;
    padding: 8px 16px;
    background: rgba(0, 136, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--accent-blue);
}

/* Show camera hint on mobile */
@media (max-width: 768px) {
    .upload-zone .mobile-hint {
        display: block;
    }
    
    .upload-zone {
        padding: 32px 16px;
    }
    
    .upload-zone .upload-icon {
        font-size: 36px;
    }
}

/* ========== Image Preview ========== */
.image-preview {
    position: relative;
    display: none;
    max-width: 100%;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.upload-zone.has-image .image-preview {
    display: block;
}

.upload-zone.has-image .upload-default {
    display: none;
}

.image-preview img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: #000;
}

.image-preview .preview-overlay {
    position: absolute;
    top: 0;
    right: 0;
    padding: 8px;
    display: flex;
    gap: 6px;
}

.image-preview .preview-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
}

.image-preview .preview-btn:hover {
    transform: scale(1.1);
}

.image-preview .btn-change {
    background: rgba(0, 136, 255, 0.7);
}

.image-preview .btn-remove {
    background: rgba(255, 51, 85, 0.7);
}

/* ========== Analyze Button ========== */
.analyze-section {
    text-align: center;
    margin-bottom: 24px;
}

.analyze-btn-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-analyze {
    padding: 14px 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    opacity: 0.5;
    pointer-events: none;
}

.btn-analyze.ready {
    opacity: 1;
    pointer-events: auto;
}

.btn-analyze.ready:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 136, 255, 0.35);
}

.btn-analyze:active {
    transform: translateY(0);
}

.btn-analyze.loading {
    opacity: 0.7;
    pointer-events: none;
    cursor: wait;
}

/* ========== Save Image Button ========== */
.btn-save-image {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: linear-gradient(135deg, #06d6a0, #00b894);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-save-image:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 214, 160, 0.3);
}

.btn-save-image:active {
    transform: translateY(0);
}

.btn-save-image span {
    font-size: 18px;
}

/* Capture flash animation */
.saving-flash {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: white;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
}
.saving-flash.active {
    opacity: 0.3;
}

@media (max-width: 768px) {
    .btn-save-image {
        padding: 12px 20px;
        font-size: 15px;
    }
}

/* ========== Loading State ========== */
.loading-section {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.loading-section.active {
    display: block;
}

.spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    position: relative;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: var(--accent-blue);
    animation: spin 1s linear infinite;
}

.spinner-ring:nth-child(2) {
    width: 80%;
    height: 80%;
    top: 10%;
    left: 10%;
    border-top-color: var(--accent-purple);
    animation-direction: reverse;
    animation-duration: 0.8s;
}

.spinner-ring:nth-child(3) {
    width: 60%;
    height: 60%;
    top: 20%;
    left: 20%;
    border-top-color: var(--accent-cyan);
    animation-duration: 0.6s;
}

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

.loading-text {
    color: var(--text-secondary);
    font-size: 15px;
}

.loading-steps {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.loading-step {
    color: var(--text-muted);
    font-size: 13px;
    opacity: 0;
    transition: opacity 0.5s;
}

.loading-step.active {
    opacity: 1;
    color: var(--accent-cyan);
}

/* ========== Results Section ========== */
.results-section {
    display: none;
}

.results-section.active {
    display: block;
    animation: fadeSlideUp 0.6s ease-out;
}

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

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 8px;
}

.results-title {
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-new-analysis {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-new-analysis:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

/* ========== Result Cards ========== */
.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 640px) {
    .result-grid {
        grid-template-columns: 1fr;
    }
}

.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius) var(--radius) 0 0;
}

.result-card.theme-card::before { background: var(--accent-blue); }
.result-card.content-card::before { background: var(--accent-purple); }
.result-card.style-card::before { background: var(--accent-cyan); }
.result-card.expression-card::before { background: var(--accent-orange); }

.result-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.card-icon {
    font-size: 28px;
    margin-bottom: 8px;
    display: block;
}

.card-label {
    font-size: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.theme-card .card-label { color: var(--accent-blue); }
.content-card .card-label { color: var(--accent-purple); }
.style-card .card-label { color: var(--accent-cyan); }
.expression-card .card-label { color: var(--accent-orange); }

.card-value {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.content-card .card-value {
}

/* ========== Error State ========== */
.error-section {
    display: none;
    text-align: center;
    padding: 32px 20px;
    background: rgba(255, 51, 85, 0.08);
    border: 1px solid rgba(255, 51, 85, 0.2);
    border-radius: var(--radius);
    margin-bottom: 16px;
}

.error-section.active {
    display: block;
    animation: fadeSlideUp 0.4s ease-out;
}

.error-icon {
    font-size: 40px;
    margin-bottom: 10px;
    display: block;
}

.error-message {
    color: #ff5577;
    font-size: 15px;
    font-weight: 500;
}

.error-detail {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 6px;
}

/* ========== Footer ========== */
.app-footer {
    margin-top: auto;
    text-align: center;
    padding: 32px 0 16px;
    color: var(--text-muted);
    font-size: 12px;
    border-top: 1px solid var(--border-color);
}

.app-footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

.app-footer .privacy-link {
    margin-top: 8px;
}

.app-footer .privacy-link a {
    font-size: 13px;
    opacity: 0.8;
    transition: opacity var(--transition);
}

.app-footer .privacy-link a:hover {
    opacity: 1;
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========== Animations ========== */
.pulse-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-cyan);
    margin: 0 2px;
    animation: pulse 1.5s ease-in-out infinite;
}

.pulse-dot:nth-child(2) { animation-delay: 0.2s; }
.pulse-dot:nth-child(3) { animation-delay: 0.4s; }

/* ========== Mobile Responsive ========== */
@media (max-width: 768px) {
    /* Show camera button on mobile */
    .upload-zone .camera-btn {
        display: inline-flex !important;
    }
    .upload-btn-row {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    .upload-zone .upload-btn {
        width: 80%;
        justify-content: center;
        padding: 8px 28px;
        font-size: 18px;
    }
    .upload-zone {
        padding: 28px 16px;
    }
    .upload-zone .upload-icon {
        font-size: 36px;
    }
    .upload-zone .mobile-hint {
        display: block;
    }
}

@keyframes pulse {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1.2); }
}

/* ========== Auth Modal ========== */

.auth-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
    overflow-y: auto;
}

.auth-modal-content {
    width: 100%;
    max-width: 400px;
    padding: 32px 24px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 24px;
}

.auth-logo img {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    margin-bottom: 12px;
}

.auth-logo h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.auth-logo p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Tabs */
.auth-tabs {
    display: flex;
    gap: 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 24px;
}

.auth-tab {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.auth-tab.active {
    background: var(--accent-blue);
    color: #fff;
}

/* Form */
.auth-form {
    display: none;
}

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

.auth-method-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.method-tab {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.method-tab.active {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.optional {
    color: var(--text-muted);
    font-weight: 400;
}

.auth-input {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: var(--transition);
}

.auth-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 136, 255, 0.15);
}

.auth-input::placeholder {
    color: var(--text-muted);
}

.auth-error {
    color: #ff4444;
    font-size: 13px;
    margin-bottom: 12px;
    display: none;
    padding: 8px 12px;
    background: rgba(255, 68, 68, 0.1);
    border-radius: 8px;
}

.auth-error.show {
    display: block;
}

.auth-submit {
    width: 100%;
    padding: 13px;
    background: var(--accent-blue);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 4px;
}

.auth-submit:hover {
    background: #0077ee;
    transform: translateY(-1px);
}

.auth-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.auth-divider {
    text-align: center;
    margin: 18px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    left: 0; right: 0; top: 50%;
    height: 1px;
    background: var(--border-color);
}

.auth-divider span {
    background: var(--bg-primary);
    padding: 0 12px;
    color: var(--text-muted);
    font-size: 13px;
    position: relative;
    z-index: 1;
}

.auth-google-btn {
    width: 100%;
    padding: 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
}

.auth-google-btn:hover {
    background: var(--bg-card-hover);
    border-color: #666688;
}

.google-icon {
    width: 20px;
    height: 20px;
    background: #fff;
    color: #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

/* User info in header */
.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-name {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.user-quota {
    font-size: 12px;
    color: var(--accent-cyan);
    background: rgba(6, 214, 160, 0.12);
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.btn-logout {
    background: none;
    border: 1px solid rgba(255, 68, 68, 0.3);
    color: #ff6666;
    font-size: 13px;
    cursor: pointer;
    padding: 4px 12px;
    border-radius: 6px;
    transition: var(--transition);
}

.btn-logout:hover {
    color: #fff;
    background: rgba(255, 68, 68, 0.25);
    border-color: #ff4444;
}

@media (max-width: 768px) {
    .auth-modal-content {
        padding: 24px 16px;
    }
}