:root {
    --bg-color: #0b0e14;
    --card-bg: #161b22;
    --card-border: #30363d;
    --primary: #58a6ff;
    --primary-hover: #1f6feb;
    --secondary: #238636;
    --secondary-hover: #2ea043;
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --danger: #f85149;
    --success: #3fb950;
    --warning: #d29922;
    --glass: rgba(22, 27, 34, 0.8);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--card-border);
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, #58a6ff, #bc8cff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

@media (max-width: 992px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 1.5rem;
}

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

input[type="text"], 
input[type="datetime-local"], 
textarea, 
select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: #0d1117;
    border: 1px solid var(--card-border);
    border-radius: 6px;
    color: var(--text-main);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    gap: 0.5rem;
}

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

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

.btn-secondary {
    background-color: var(--secondary);
    color: #fff;
}

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-main);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
    background-color: var(--danger);
    color: #fff;
}

.numbers-list {
    max-height: 400px;
    overflow-y: auto;
}

.number-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--card-border);
}

.number-item:last-child {
    border-bottom: none;
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 700;
}

.status-pending { background: rgba(210, 153, 34, 0.2); color: var(--warning); }
.status-sent { background: rgba(63, 185, 80, 0.2); color: var(--success); }
.status-error { background: rgba(248, 81, 73, 0.2); color: var(--danger); }

.image-preview {
    width: 100%;
    height: 200px;
    border: 2px dashed var(--card-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.5rem;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--text-muted);
}

.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

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

.card {
    animation: fadeIn 0.4s ease-out forwards;
}