:root {
    --bg-dark: #020617;
    --card-bg: rgba(15, 23, 42, 0.75);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.4);
    --border: rgba(51, 65, 85, 0.6);
    --input-bg: rgba(2, 6, 23, 0.6);
    --btn-bg: linear-gradient(135deg, #38bdf8, #0ea5e9);
    --error-bg: rgba(225, 29, 72, 0.1);
    --error-text: #fda4af;
    --error-border: rgba(225, 29, 72, 0.2);
    --gradient-start: #1e293b;
    --gradient-end: #020617;
}

.light-theme {
    --bg-dark: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.9);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #8b5cf6;
    --accent-glow: rgba(139, 92, 246, 0.15);
    --border: rgba(203, 213, 225, 0.8);
    --input-bg: rgba(241, 245, 249, 0.9);
    --btn-bg: linear-gradient(135deg, #8b5cf6, #7c3aed);
    --error-bg: rgba(251, 113, 133, 0.1);
    --error-text: #e11d48;
    --error-border: rgba(251, 113, 133, 0.2);
    --gradient-start: #f3e8ff;
    --gradient-end: #f8fafc;
}

/* Logo Toggling */
/* Dark theme (default): show light logo on dark background */
.logo-light { display: block !important; }
.logo-dark { display: none !important; }
/* Light theme: show dark logo on light background */
.light-theme .logo-light { display: none !important; }
.light-theme .logo-dark { display: block !important; }

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.login-container {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 0% 0%, var(--gradient-start) 0%, var(--gradient-end) 100%);
    position: relative;
}

.login-container::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('background_dark.png') center/cover no-repeat;
    opacity: 0.15;
    z-index: 0;
    filter: saturate(0.5);
    transition: all 0.4s ease;
}

.light-theme .login-container::before {
    background: url('background_light.png') center/cover no-repeat;
    opacity: 0.4;
    filter: saturate(1.5) hue-rotate(250deg) brightness(1.1);
}

.login-card {
    position: relative;
    z-index: 10;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 3.5rem 2.5rem;
    border-radius: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7),
                0 0 40px rgba(2, 6, 23, 0.5);
    width: 100%;
    max-width: 400px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    animation: slideUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

.logo-img {
    background-color: transparent !important;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.2));
    max-height: 100px;
    width: auto;
    transition: transform 0.3s ease;
}

.light-theme .logo-img {
    filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.2));
}

.logo-img:hover {
    transform: scale(1.05);
}

.login-title {
    text-align: center;
    font-size: 1.85rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.form-input {
    background-color: var(--input-bg) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-primary) !important;
    padding: 0.75rem 1.25rem !important;
    font-size: 1rem !important;
    border-radius: 0.75rem !important;
    margin-bottom: 1.25rem !important;
    width: 100%;
    height: 3.5rem !important;
    transition: all 0.25s ease !important;
    outline: none !important;
    font-family: inherit !important;
    box-shadow: none !important;
}

.form-input:hover {
    border-color: rgba(56, 189, 248, 0.4) !important;
}

.form-input:focus {
    border-color: var(--accent) !important;
    background-color: var(--input-bg) !important;
    box-shadow: 0 0 0 4px var(--accent-glow) !important;
}

.form-input::placeholder {
    color: var(--text-secondary) !important;
    opacity: 0.5;
}

.login-button {
    background: var(--btn-bg) !important;
    border: none !important;
    color: #ffffff !important;
    padding: 0.875rem !important;
    border-radius: 0.75rem !important;
    font-weight: 600 !important;
    font-size: 1rem !important;
    width: 100%;
    height: 3.5rem !important;
    cursor: pointer;
    transition: all 0.25s ease !important;
    margin-top: 0.5rem !important;
    box-shadow: 0 4px 12px var(--accent-glow) !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.login-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 16px var(--accent-glow) !important;
    filter: brightness(1.05);
}

.login-button:active {
    transform: translateY(0);
}

.login-error:not(:empty) {
    margin-top: 1.25rem;
    text-align: center;
    color: var(--error-text);
    background: var(--error-bg);
    padding: 0.75rem;
    border-radius: 0.6rem;
    border: 1px solid var(--error-border);
    font-size: 0.85rem;
}

/* Progress Bar Enhancements */
#progress-container {
    background: var(--input-bg);
    padding: 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    animation: slideInDown 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes slideInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

#fetch-progress-bar {
    background-color: rgba(255, 255, 255, 0.05) !important;
    border-radius: 10px !important;
    overflow: hidden;
    height: 8px !important;
}

#fetch-progress-bar .progress-bar {
    background: var(--btn-bg) !important;
    box-shadow: 0 0 15px var(--accent-glow);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border-radius: 10px !important;
}

#progress-percentage {
    text-shadow: 0 0 8px var(--accent-glow);
}

#progress-status {
    font-weight: 500;
    letter-spacing: 0.02em;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard styles */
.navbar-custom {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 2rem;
}

/* Theme Switcher Button */
.theme-switch-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1.2rem;
    outline: none;
}

.theme-switch-btn:hover {
    transform: scale(1.1) rotate(15deg);
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.theme-switch-btn:active {
    transform: scale(0.95);
}

#theme-main-container {
    min-height: 100vh;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Sidebar styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    padding: 2rem 1.5rem;
    background-color: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    padding-left: 0.5rem;
}

.sidebar-logo img {
    height: 40px;
}

.nav-link-custom {
    display: flex;
    align-items: center;
    padding: 0.875rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.75rem;
    margin-bottom: 0.5rem;
    transition: all 0.2s ease;
    cursor: pointer;
    font-weight: 500;
}

.nav-link-custom:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-link-custom.active {
    background: var(--btn-bg);
    color: white;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.nav-link-custom i {
    margin-right: 1rem;
    font-size: 1.25rem;
}

.sidebar-footer {
    margin-top: auto;
}

/* Content area */
.content-area {
    margin-left: 260px;
    padding: 2.5rem;
    min-height: 100vh;
}

.dashboard-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 1.5rem;
    padding: 2rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.data-table-container {
    overflow-x: auto;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
}

.custom-table th {
    background-color: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.custom-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.custom-table tr:last-child td {
    border-bottom: none;
}

.custom-table tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Input groups */
.api-key-input {
    margin-bottom: 1.5rem;
}

.api-key-input label {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Custom styles for dcc.Dropdown in dark/light mode - DEPRECATED in favour of custom-coded dropdown */
.custom-dropdown-root {
    position: relative;
    width: 100%;
    margin-bottom: 1.25rem;
    font-family: inherit;
    z-index: 1000;
    isolation: isolate;
}

.custom-dropdown-backdrop {
    position: fixed;
    inset: 0;
    z-index: 999;
    background: transparent;
}

.custom-dropdown-control {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    border-radius: 0.75rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.25s ease;
    user-select: none;
    text-align: left;
    appearance: none;
    -webkit-appearance: none;
}

.custom-dropdown-control:hover {
    border-color: rgba(56, 189, 248, 0.4);
}

.custom-dropdown-control:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
    outline: none;
}

.custom-dropdown-selected-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding-right: 0.75rem;
}

.custom-dropdown-arrow {
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.custom-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    z-index: 1001;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    animation: slideInDown 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    max-height: 18rem;
    overflow-y: auto;
}

.custom-dropdown-option {
    padding: 0.875rem 1.25rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.light-theme .custom-dropdown-option {
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.custom-dropdown-option:last-child {
    border-bottom: none;
}

.custom-dropdown-option:hover {
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent);
}

.custom-dropdown-option.active {
    background-color: var(--accent);
    color: white;
}

.custom-dropdown-check {
    opacity: 0;
    font-weight: 700;
}

.custom-dropdown-option.active .custom-dropdown-check {
    opacity: 1;
}

.custom-dropdown-empty {
    padding: 0.875rem 1.25rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Original dcc.Dropdown styles kept for backward compatibility if needed elsewhere */
.custom-dropdown.form-input {
    padding: 0 !important;
    background-color: transparent !important;
    border: none !important;
    height: auto !important;
}

/* Main Control Box */
.custom-dropdown .Select-control {
    background-color: var(--input-bg) !important;
    border: 1px solid var(--border) !important;
    border-radius: 0.75rem !important;
    height: 3.5rem !important;
    display: flex !important;
    align-items: center !important;
    transition: all 0.25s ease !important;
    box-shadow: none !important;
}

.custom-dropdown .Select-control:hover {
    border-color: rgba(56, 189, 248, 0.4) !important;
}

.custom-dropdown .is-focused > .Select-control {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 4px var(--accent-glow) !important;
}

/* Placeholder & Selected Value */
.custom-dropdown .Select-placeholder,
.custom-dropdown .Select-value,
.custom-dropdown .Select-value-label {
    color: var(--text-primary) !important;
    padding-left: 0.75rem !important;
    font-size: 1rem !important;
    line-height: 3.5rem !important;
}

.custom-dropdown .Select-placeholder {
    color: var(--text-secondary) !important;
    opacity: 0.5;
}

/* Search Input */
.custom-dropdown .Select-input {
    height: 3.5rem !important;
    padding-left: 0.75rem !important;
    background-color: transparent !important;
}

.custom-dropdown .Select-input > input {
    color: var(--text-primary) !important;
    font-family: inherit !important;
    padding: 1rem 0 !important;
    background: transparent !important;
}

.custom-dropdown .Select-input > input::placeholder {
    color: var(--text-secondary) !important;
    opacity: 0.5;
}

/* Dropdown Menu (The Popup) */
.custom-dropdown .Select-menu-outer {
    background-color: var(--bg-dark) !important;
    border: 1px solid var(--border) !important;
    border-radius: 0.75rem !important;
    margin-top: 0.5rem !important;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5) !important;
    overflow: hidden !important;
    z-index: 1001 !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
}

/* Option Styles */
.custom-dropdown .VirtualizedSelectOption {
    background-color: transparent !important;
    color: var(--text-primary) !important;
    padding: 0.75rem 1.25rem !important;
    transition: all 0.2s ease !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03) !important;
}

.light-theme .custom-dropdown .VirtualizedSelectOption {
    border-bottom: 1px solid rgba(0, 0, 0, 0.03) !important;
}

.custom-dropdown .VirtualizedSelectFocusedOption {
    background-color: var(--accent-glow) !important;
    color: var(--accent) !important;
}

.custom-dropdown .VirtualizedSelectOption:hover {
    background-color: rgba(56, 189, 248, 0.1) !important;
}

/* Ensure selected option in list is also visible */
.custom-dropdown .Select-option.is-selected {
    background-color: var(--accent) !important;
    color: white !important;
}

/* Arrow & Multi-select/Clear buttons */
.custom-dropdown .Select-arrow-zone {
    padding-right: 1rem !important;
}

.custom-dropdown .Select-arrow {
    border-top-color: var(--text-secondary) !important;
    border-width: 6px 6px 0 !important;
}

.custom-dropdown .is-open .Select-arrow {
    border-top-color: var(--accent) !important;
}

.custom-dropdown .Select-clear-zone {
    color: var(--text-secondary) !important;
}

.custom-dropdown .Select-clear-zone:hover {
    color: #f43f5e !important;
}

/* Animation utilities */
.page-transition {
    animation: slideUpFade 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes slideUpFade {
    0% {
        opacity: 0;
        transform: translateY(15px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Global Dash Loader (Top Progress Bar) */
#_dash-loading {
    display: block !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 4px !important;
    z-index: 10001 !important;
    background: transparent !important;
    pointer-events: none !important;
    animation: fadeIn 0.4s ease forwards !important;
}

#_dash-loading::after {
    content: "" !important;
    display: block !important;
    height: 100% !important;
    width: 0 !important;
    background: var(--btn-bg) !important;
    box-shadow: 0 0 10px var(--accent-glow) !important;
    animation: loadingBar 2s cubic-bezier(0.4, 0, 0.2, 1) infinite !important;
}

@keyframes loadingBar {
    0% { width: 0; left: 0; }
    50% { width: 70%; left: 15%; }
    100% { width: 0; left: 100%; }
}

/* Shimmer/Skeleton loader */
.shimmer-card {
    background: var(--card-bg);
    border-radius: 1rem;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border);
}

.shimmer-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    background-size: 200% 100%;
    animation: shimmerEffect 1.5s infinite linear;
}

.light-theme .shimmer-card::before {
    background: linear-gradient(
        90deg,
        rgba(0, 0, 0, 0) 0%,
        rgba(0, 0, 0, 0.03) 50%,
        rgba(0, 0, 0, 0) 100%
    );
}

@keyframes shimmerEffect {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Dedicated Top Progress Bar for Data Fetching */
.fetch-loading-bar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 4px !important;
    z-index: 10002 !important;
    background: transparent !important;
    pointer-events: none !important;
    animation: fadeIn 0.4s ease forwards !important;
}

.fetch-loading-bar::after {
    content: "" !important;
    display: block !important;
    height: 100% !important;
    width: 0 !important;
    background: var(--btn-bg) !important;
    box-shadow: 0 0 10px var(--accent-glow) !important;
    animation: loadingBar 2s cubic-bezier(0.4, 0, 0.2, 1) infinite !important;
}

/* Smooth content transitions */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

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