:root {
    --bg-color: #f0f4f8;
    --panel-bg: rgba(255, 255, 255, 0.75);
    --panel-border: rgba(0, 0, 0, 0.08);
    --accent: #4f7cac;
    --accent-hover: #3a5f8a;
    --accent-light: rgba(79, 124, 172, 0.08);
    --text-main: #1a2b3c;
    --text-muted: #6b7d8e;
    --success: #2e9959;
    --danger: #d64045;
    --radius: 14px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(79, 124, 172, 0.06), transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(46, 153, 89, 0.04), transparent 40%);
    min-height: 100vh;
    color: var(--text-main);
    overflow: hidden;
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.app-container {
    display: flex;
    height: calc(100vh - 64px);
    margin-top: 64px;
    padding: 16px;
    gap: 16px;
}

/* ========== Sidebar ========== */
.sidebar {
    width: 340px;
    display: flex;
    flex-direction: column;
    padding: 24px;
    overflow-y: auto;
    flex-shrink: 0;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.logo-icon {
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(79, 124, 172, 0.35);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--text-main);
}

/* ========== Upload ========== */
.upload-section {
    margin-bottom: 32px;
}

.upload-btn {
    display: block;
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: white;
    text-align: center;
    border-radius: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    box-shadow: 0 2px 8px rgba(79, 124, 172, 0.2);
}

.upload-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(79, 124, 172, 0.3);
}

.file-name {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ========== Controls ========== */
.controls-section h2 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.control-group {
    margin-bottom: 22px;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.control-group label {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-main);
}

.val-display {
    font-size: 0.85rem;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.control-group small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.4;
}

/* ========== Range Inputs ========== */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    margin-top: -6px;
    box-shadow: 0 0 6px rgba(79, 124, 172, 0.3);
    transition: transform 0.15s, box-shadow 0.15s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    box-shadow: 0 0 10px rgba(79, 124, 172, 0.5);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 2px;
}

.range-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.range-inputs input {
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    padding: 8px;
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.range-inputs input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79, 124, 172, 0.1);
}

.range-inputs span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========== Workspace ========== */
.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
    overflow-y: auto; /* enable scrolling for bottom panel */
    padding-bottom: 20px;
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-shrink: 0;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 12px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #c0c8d0;
}

.dot.active {
    background: var(--success);
    box-shadow: 0 0 8px rgba(46, 153, 89, 0.4);
}

.dot.processing {
    background: var(--accent);
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    from {
        opacity: 0.4;
        box-shadow: 0 0 0 var(--accent);
    }
    to {
        opacity: 1;
        box-shadow: 0 0 10px rgba(79, 124, 172, 0.4);
    }
}

    /* Original rules overridden below for results-bottom-panel */

.stats-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 4px;
}

.export-actions {
    display: flex;
    gap: 8px;
}

.stats-box h3 {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

.export-btn {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 4px 14px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.export-btn:hover:not(:disabled) {
    background: var(--accent);
    color: white;
    box-shadow: 0 2px 8px rgba(79, 124, 172, 0.2);
}

.export-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    border-color: var(--text-muted);
    color: var(--text-muted);
}

.stats-box .count {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.1;
    margin-top: 12px;
    margin-bottom: 12px;
}

.canvas-area {
    /* Set a minimum height so it feels big but let it grow if possible */
    min-height: 60vh;
    flex: 1 1 auto;
    position: relative;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.4);
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

/* NEW: Bottom panel wrapping both stats and histogram */
.results-bottom-panel {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 12px;
    align-items: stretch;
}

/* Override existing stats-box for horizontal layout */
.stats-box {
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.empty-state {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ========== Toolbar ========== */
.toolbar {
    margin-bottom: 0px;
    padding: 10px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.tool-group {
    display: flex;
    gap: 8px;
}

.tool-btn {
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background: var(--accent-light);
    border-color: var(--accent);
}

.tool-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    box-shadow: 0 2px 8px rgba(79, 124, 172, 0.25);
}

.toolbar-hint small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

#image-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#result-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
    box-shadow: var(--shadow-md);
}

#result-image.loaded {
    opacity: 1;
}

/* ========== Global Nav ========== */
.global-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    border-radius: 0;
    border-top: none;
    border-left: none;
    border-right: none;
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.nav-brand {
    display: flex;
    gap: 12px;
    align-items: center;
    font-weight: 600;
    color: var(--text-main);
}

.nav-tabs {
    display: flex;
    gap: 4px;
}

.nav-tab {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.2s;
}

.nav-tab:hover {
    color: var(--text-main);
    background: var(--accent-light);
}

.nav-tab.active {
    color: var(--accent);
    background: rgba(79, 124, 172, 0.1);
    font-weight: 600;
}

.nav-auth {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.lang-toggle {
    background: var(--accent-light);
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 5px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.5px;
}

.lang-toggle:hover {
    background: var(--accent);
    color: white;
}

.logged-in-user {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-right: 8px;
}

.auth-btn {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 6px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.auth-btn:hover {
    background: var(--accent);
    color: white;
    box-shadow: 0 2px 8px rgba(79, 124, 172, 0.2);
}

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

.auth-btn.primary:hover {
    background: var(--accent-hover);
}

.hidden {
    display: none !important;
}

/* ========== Dashboard ========== */
.dashboard-workspace,
.gallery-workspace {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

.dashboard-workspace h2,
.gallery-workspace h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-main);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 24px 0;
}

.stat-card {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--panel-border);
    padding: 24px;
    border-radius: 14px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 500;
}

.dash-val {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-top: 8px;
}

.chart-container {
    height: 400px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 14px;
    padding: 24px;
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow-sm);
}

/* ========== Gallery ========== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.gallery-item {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--panel-border);
    border-radius: 14px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: var(--shadow-sm);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.gallery-item-info {
    padding: 16px;
}

.gallery-item-info h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
    color: var(--text-main);
}

.gallery-item-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========== Pagination ========== */
.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-top: 32px;
}

.pagination-controls span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ========== Toasts ========== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 9999;
}

.toast {
    min-width: 260px;
    padding: 14px 20px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    font-size: 0.9rem;
    box-shadow: var(--shadow-md);
    transform: translateX(120%);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

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

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

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

/* ========== Modals ========== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: #ffffff;
    padding: 32px;
    width: 100%;
    max-width: 400px;
    position: relative;
    box-shadow: var(--shadow-lg);
    border-radius: 16px;
}

#modal-title {
    margin-bottom: 24px;
    color: var(--text-main);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    background: #f5f7fa;
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79, 124, 172, 0.1);
}

.full-width {
    width: 100%;
    margin-top: 8px;
    padding: 12px;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 24px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-main);
}

.modal-footer {
    margin-top: 16px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.modal-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

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

.form-message {
    color: var(--danger);
    font-size: 0.85rem;
    margin-bottom: 12px;
    min-height: 18px;
}

.divider {
    width: 1px;
    background: var(--panel-border);
    margin: 0 4px;
}

/* ========== Stats Panel (new) ========== */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 12px 0;
}

.stat-mini {
    background: var(--accent-light);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
}

.stat-mini .stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}

.stat-mini .stat-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
}

/* ========== Size Histogram ========== */
.histogram-container {
    height: 160px;
    margin-top: 8px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 10px;
    border: 1px solid var(--panel-border);
}

.histogram-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ========== Save to Gallery Button ========== */
.btn-save-gallery {
    background: var(--accent);
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-save-gallery:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 2px 8px rgba(79, 124, 172, 0.2);
}

.btn-save-gallery:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}