:root {
    --primary: 235 75% 60%;
    --primary-foreground: 235 100% 98%;
    --background: 210 40% 98%;
    --foreground: 222 47% 11%;
    --card: 0 0% 100%;
    --card-foreground: 222 47% 11%;
    --popover: 0 0% 100%;
    --popover-foreground: 222 47% 11%;
    --border: 214 32% 91%;
    --input: 214 32% 91%;
    --ring: 235 75% 60%;
    --radius: 1rem;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Functional Colors */
    --success: 142 70% 45%;
    --warning: 38 92% 50%;
    --danger: 0 84% 60%;
}

.dark {
    --background: 222 47% 11%;
    --foreground: 213 27% 84%;
    --card: 222 47% 13%;
    --card-foreground: 213 27% 84%;
    --popover: 222 47% 11%;
    --popover-foreground: 213 27% 84%;
    --border: 217 32% 20%;
    --input: 217 32% 20%;
    --primary: 235 75% 65%;
    --primary-foreground: 235 100% 98%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', 'Inter', -apple-system, sans-serif;
}

body {
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
    min-height: 100vh;
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s ease;
}

/* Optimized Premium Surface */
.glass-pane {
    background-color: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: calc(var(--radius) - 0.25rem);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    border: none;
    gap: 0.5rem;
}

.btn > * {
    pointer-events: none;
}

.btn-primary {
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
}

.btn-primary:hover {
    filter: brightness(1.05);
}

.btn:active {
    transform: scale(0.98);
}

.text-btn {
    background: none;
    border: none;
    padding: 0;
    color: hsl(var(--primary));
    cursor: pointer;
    transition: opacity 0.2s;
}

.text-btn:hover {
    opacity: 0.7;
    text-decoration: underline;
}

/* Input Styles */
.input {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: hsl(var(--background));
    border: 1px solid hsl(var(--border));
    border-radius: calc(var(--radius) - 0.5rem);
    color: hsl(var(--foreground));
}

.input:focus {
    outline: none;
    border-color: hsl(var(--primary));
}

/* Custom Select Styling */
select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem !important;
    cursor: pointer;
}

select option {
    background-color: #0f172a; /* Dark blue/black for dropdown items */
    color: white;
}

/* High-Performance Animations */
.hidden { display: none !important; }

/* Notification Banner */
.notification-banner {
    position: fixed;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 1rem 2rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 1000;
    box-shadow: 0 10px 25px -5px rgb(0 0 0 / 0.1);
    animation: fadeIn 0.3s ease-out;
}

.banner-info { background: hsl(var(--primary)); color: white; }
.banner-success { background: hsl(var(--success)); color: white; }
.banner-error { background: hsl(var(--danger)); color: white; }

/* Chips */
.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    background: hsl(var(--primary) / 0.1);
    color: hsl(var(--primary));
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid hsl(var(--primary) / 0.2);
}

.chip button {
    background: none;
    border: none;
    color: currentColor;
    cursor: pointer;
    font-weight: 700;
    padding: 0;
    display: flex;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: hsl(var(--foreground) / 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: hsl(var(--primary));
    transition: width 0.5s ease;
}

/* Loading Spinner */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid hsl(var(--foreground) / 0.1);
    border-top-color: hsl(var(--primary));
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Ad Item */
.ad-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border) / 0.5);
    border-radius: 0.75rem;
}

.ads-mini-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.ad-mini-card {
    padding: 0.75rem;
    background: hsl(var(--foreground) / 0.03);
    border: 1px solid hsl(var(--border) / 0.5);
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ad-mini-card .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ad-mini-card .name {
    font-size: 0.75rem;
    font-weight: 700;
    color: hsl(var(--primary));
}

.ad-mini-card .format {
    font-size: 0.6rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    background: hsl(var(--primary) / 0.1);
    color: hsl(var(--primary));
    font-weight: 600;
}

.ad-mini-card .actions {
    display: flex;
    gap: 0.4rem;
}

.ad-mini-card .btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    color: hsl(var(--foreground) / 0.4);
    padding: 0.2rem;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

.ad-mini-card .btn-icon.delete {
    color: hsl(var(--danger));
}

.ad-mini-card .btn-icon:hover {
    color: hsl(var(--foreground));
}

.ad-mini-card .btn-icon.delete:hover {
    color: hsl(var(--danger) / 0.8);
}

.btn-danger {
    background: hsl(var(--danger));
    color: white;
}

.btn-danger:hover {
    background: hsl(var(--danger) / 0.9);
}



/* Toast Notifications */
#toastContainer {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast-notification {
    pointer-events: auto;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    background: hsl(var(--card));
    color: hsl(var(--card-foreground));
    box-shadow: var(--shadow-lg);
    border-left: 4px solid hsl(var(--primary));
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 280px;
    transform: translateX(-120%);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.toast-success {
    border-left-color: hsl(var(--success));
}

.toast-error {
    border-left-color: hsl(var(--danger));
}

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