:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #dc2626;
    /* Telkomsel Red */

    /* Operator Colors */
    --telkomsel-color: #dc2626;
    /* Telkomsel Red */
    --indosat-color: #eab308;
    /* Indosat Yellow */
    --xl-color: #2563eb;
    /* XL Blue */
    --tri-color: #9333ea;
    /* Tri Purple */
    --smartfren-color: #db2777;
    /* Smartfren Pink */
    --unknown-color: #64748b;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 1400px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding-top: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin: 0;
    background: linear-gradient(to right, #dc2626, #eab308);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Layout */
.app-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
}

@media (max-width: 900px) {
    .app-layout {
        grid-template-columns: 1fr;
    }
}

/* Panel & Cards */
.panel,
.card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.input-panel {
    height: calc(100vh - 150px);
    min-height: 500px;
}

.panel-header,
.card-header {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    margin: 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge,
.count-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8em;
}

/* Textareas */
textarea {
    width: 100%;
    height: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 20px;
    resize: none;
    font-family: monospace;
    font-size: 0.9em;
    outline: none;
    box-sizing: border-box;
}

.input-wrapper {
    flex-grow: 1;
    position: relative;
}

/* Output Grid */
.output-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    align-content: start;
}

.card {
    height: 400px;
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-2px);
}

.card-body {
    flex-grow: 1;
    overflow: hidden;
}

/* Card Specifics */
.card-telkomsel {
    border-top: 4px solid var(--telkomsel-color);
}

.card-indosat {
    border-top: 4px solid var(--indosat-color);
}

.card-xl {
    border-top: 4px solid var(--xl-color);
}

.card-tri {
    border-top: 4px solid var(--tri-color);
}

.card-smartfren {
    border-top: 4px solid var(--smartfren-color);
}

.card-unknown {
    border-top: 4px solid var(--unknown-color);
}

/* Buttons */
.action-bar {
    padding: 15px;
    display: flex;
    gap: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.card-footer {
    padding: 10px 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.btn,
.btn-sm {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn {
    padding: 10px 16px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85em;
}

.btn-primary {
    background: var(--accent-color);
    color: #0f172a;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.stats-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.percent-badge {
    color: var(--text-secondary);
    font-size: 0.8em;
    background: rgba(0, 0, 0, 0.2);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
}