:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #10b981;
    --danger: #ef4444;
    --border: #334155;
    --radius: 12px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-container {
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    padding: 1.5rem 2rem 1rem;
    flex-shrink: 0;
}

.header-top {
    display: flex;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 2.25rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
}

/* Content Layout */
.content {
    padding: 0 2rem 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.grid-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 1.5rem;
    flex: 1;
    min-height: 0;
    /* Important for flex-child grid scrolling */
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.config-panel {
    padding: 0;
    /* Remove padding for inner body scrolling */
    min-height: 0;
    height: 100%;
}

.config-panel .panel-header {
    padding: 1.5rem 1.5rem 0.5rem;
    margin-bottom: 0;
}

.config-panel .panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.config-panel .panel-footer {
    padding: 1rem 1.5rem 1.5rem;
}

.panel-body::-webkit-scrollbar {
    width: 6px;
}

.panel-body::-webkit-scrollbar-track {
    background: transparent;
}

.panel-body::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

.panel-body::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}

h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

select,
input {
    background-color: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

select:focus,
input:focus {
    border-color: var(--primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
    padding: 0.5rem 0;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-label span {
    font-size: 0.9rem;
    color: var(--text-main);
    font-weight: 600;
}

.file-upload {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
}

.file-upload:hover {
    border-color: var(--primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.file-upload input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload i {
    font-size: 2rem;
    color: var(--primary);
}

/* Advanced Options Collapsible */
.advanced-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 1rem;
    transition: all 0.2s;
    user-select: none;
}

.advanced-toggle:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
}

.advanced-toggle span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.advanced-toggle i {
    transition: transform 0.3s ease;
    color: var(--primary);
}

.advanced-toggle.active i {
    transform: rotate(180deg);
}

.advanced-options {
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
}

.advanced-options:not(.collapsed) {
    max-height: 350px;
    overflow-y: auto;
    opacity: 1;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.advanced-options::-webkit-scrollbar {
    width: 4px;
}

.advanced-options::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn.primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.btn.secondary {
    background-color: var(--bg-hover);
    color: var(--text-main);
}

.btn.secondary:hover:not(:disabled) {
    background-color: #475569;
}

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

.btn.success:hover:not(:disabled) {
    background-color: #059669;
}

/* Results Table */
.results-panel {
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.badge {
    background-color: var(--bg-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--primary);
}

.filters {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.table-container {
    flex: 1;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: var(--bg-dark);
    min-height: 500px;
}

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

th,
td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--bg-card);
    position: sticky;
    top: 0;
    font-weight: 600;
    color: var(--text-muted);
}

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

.status-valid {
    color: var(--success);
}

.status-invalid {
    color: var(--danger);
}

.panel-footer {
    padding-top: 1rem;
    display: flex;
    gap: 1rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 100;
    animation: slideIn 0.3s ease-out;
}

.toast.hidden {
    display: none;
}

@keyframes slideIn {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.empty-state {
    height: 100%;
}

.empty-state td {
    height: 100%;
    vertical-align: middle;
    border-bottom: none;
}

.empty-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    /* Ensures it takes up space even if table is small */
    color: var(--text-muted);
    gap: 1rem;
    padding: 4rem 0;
}

.empty-content i {
    font-size: 3rem;
    opacity: 0.5;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* Action Buttons */
.action-cell {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    transition: all 0.2s;
    text-decoration: none;
}

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

.action-btn.wa:hover {
    background-color: #25D366;
    border-color: #25D366;
    color: white;
}

.action-btn.tg:hover {
    background-color: #0088cc;
    border-color: #0088cc;
    color: white;
}

/* Modal & Stats Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal.hidden {
    display: none;
}

.modal-content {
    width: 500px;
    max-width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-item {
    background-color: var(--bg-dark);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border);
}

.stat-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.prefix-breakdown {
    background-color: var(--bg-dark);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.prefix-breakdown h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.prefix-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.prefix-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
}

.prefix-tag {
    font-family: monospace;
    font-weight: 600;
}

.prefix-count {
    color: var(--primary);
    font-weight: 600;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Mobile Responsive */
/* Mobile Responsive */
@media screen and (max-width: 992px) {
    body {
        overflow: auto;
        height: auto;
    }

    .app-container {
        height: auto;
    }

    .grid-layout {
        grid-template-columns: 1fr;
        height: auto;
    }

    .table-container {
        min-height: 400px;
        max-height: 600px;
    }
}

@media screen and (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .panel-footer {
        flex-direction: column;
    }
}

.api-log {
    background: #000;
    color: #0f0;
    font-family: 'Courier New', Courier, monospace;
    padding: 1.25rem;
    border-radius: 8px;
    text-align: left;
    font-size: 0.85rem;
    line-height: 1.6;
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid var(--border);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
    margin: 10px;
}