/* ═══════════════════════════════════════════════════════════════
   VoIP Call Center — Design System
   Modern dark theme with vibrant accents
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Variables ─────────────────────────────────────────── */
:root {
    /* Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2035;
    --bg-card-hover: #1e2744;
    --bg-input: #0f1629;
    --bg-glass: rgba(26, 32, 53, 0.85);

    --border-color: rgba(99, 102, 241, 0.15);
    --border-focus: rgba(99, 102, 241, 0.5);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-primary: #6366f1;       /* Indigo */
    --accent-primary-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --accent-green: #10b981;
    --accent-green-glow: rgba(16, 185, 129, 0.3);
    --accent-red: #ef4444;
    --accent-red-glow: rgba(239, 68, 68, 0.3);
    --accent-yellow: #f59e0b;
    --accent-orange: #f97316;
    --accent-cyan: #06b6d4;

    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-green: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --gradient-red: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
    --gradient-dark: linear-gradient(180deg, #0a0e1a 0%, #111827 100%);

    /* Spacing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gradient-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

a { color: var(--accent-primary); text-decoration: none; }
a:hover { color: var(--accent-primary-hover); }

/* ─── Layout ────────────────────────────────────────────────── */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-header .logo .logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    -webkit-text-fill-color: white;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-nav a,
.header-nav button {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    background: transparent;
    font-family: inherit;
}

.header-nav a:hover,
.header-nav button:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.header-nav .active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.header-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-balance {
    background: var(--bg-card);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
}

.main-content {
    flex: 1;
    padding: 32px 24px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition-base);
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.25);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ─── Stat Cards ────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.stat-card.green::before { background: var(--gradient-green); }
.stat-card.red::before { background: var(--gradient-red); }

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    margin-top: 4px;
    line-height: 1.2;
}

.stat-value.green { color: var(--accent-green); }
.stat-value.red { color: var(--accent-red); }
.stat-value.primary { color: var(--accent-primary); }

.stat-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-success {
    background: var(--gradient-green);
    color: white;
    box-shadow: 0 4px 12px var(--accent-green-glow);
}
.btn-success:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-green-glow);
}

.btn-danger {
    background: var(--gradient-red);
    color: white;
    box-shadow: 0 4px 12px var(--accent-red-glow);
}
.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-red-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.btn-ghost:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-focus);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ─── Form Elements ─────────────────────────────────────────── */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition-base);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
    color: var(--text-muted);
}

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ─── Tables ────────────────────────────────────────────────── */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

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

th {
    background: var(--bg-secondary);
    padding: 12px 16px;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 12px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(99, 102, 241, 0.05);
}

tr:hover td {
    background: var(--bg-card-hover);
}

/* ─── Badges ────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
}
.badge-red {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}
.badge-yellow {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-yellow);
}
.badge-blue {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
}
.badge-gray {
    background: rgba(100, 116, 139, 0.15);
    color: var(--text-muted);
}

/* ─── Dialer Specific ───────────────────────────────────────── */
.dialer-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 24px;
    min-height: calc(100vh - 160px);
}

.dialer-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.dialer-display {
    width: 100%;
    text-align: center;
    margin-bottom: 24px;
}

.dialer-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 2px;
    word-break: break-all;
}

.call-status {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
    min-height: 24px;
}

.call-status.active {
    color: var(--accent-green);
    animation: pulse 2s ease-in-out infinite;
}

.call-timer {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--accent-green);
    font-variant-numeric: tabular-nums;
    margin: 12px 0;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Dial Pad */
.dialpad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    width: 100%;
    max-width: 300px;
    margin-bottom: 24px;
}

.dialpad-btn {
    width: 80px;
    height: 80px;
    border: none;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    font-family: inherit;
    border: 1px solid var(--border-color);
}

.dialpad-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.dialpad-btn:active {
    transform: scale(0.95);
    background: var(--accent-primary);
}

.dialpad-btn .sub {
    font-size: 0.6rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-top: 2px;
}

/* Call Action Buttons */
.call-actions {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-top: auto;
}

.call-btn {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.call-btn-green {
    background: var(--gradient-green);
    color: white;
    box-shadow: 0 4px 16px var(--accent-green-glow);
}
.call-btn-green:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px var(--accent-green-glow);
}

.call-btn-red {
    background: var(--gradient-red);
    color: white;
    box-shadow: 0 4px 16px var(--accent-red-glow);
}
.call-btn-red:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px var(--accent-red-glow);
}

.call-btn-ghost {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.call-btn-ghost:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.call-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

/* ─── Login Page ────────────────────────────────────────────── */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    pointer-events: none;
}

.login-container::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    pointer-events: none;
}

.login-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo .icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 16px;
    box-shadow: var(--shadow-glow);
}

.login-logo h1 {
    font-size: 1.6rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

.login-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--accent-red);
    font-size: 0.85rem;
    margin-bottom: 16px;
    display: none;
}

.login-card .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    margin-top: 8px;
}

/* ─── Toast Notifications ───────────────────────────────────── */
.toast-container {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    color: var(--text-primary);
    font-size: 0.9rem;
    box-shadow: var(--shadow-md);
    animation: slideIn var(--transition-base) ease-out;
    max-width: 360px;
}

.toast.success { border-left: 3px solid var(--accent-green); }
.toast.error { border-left: 3px solid var(--accent-red); }
.toast.info { border-left: 3px solid var(--accent-primary); }

@keyframes slideIn {
    from { transform: translateX(100px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ─── Modal ─────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn var(--transition-fast) ease-out;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: scaleIn var(--transition-base) ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--accent-red);
    color: white;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

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

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ─── Empty State ───────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-primary); }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    .dialer-container {
        grid-template-columns: 1fr;
    }

    .app-header {
        padding: 0 16px;
    }

    .main-content {
        padding: 16px;
    }

    .header-nav { display: none; }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .login-card {
        margin: 16px;
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .dialpad-btn {
        width: 64px;
        height: 64px;
        font-size: 1.3rem;
    }
}

/* ─── Admin Grid ────────────────────────────────────────────── */
.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 24px;
}

/* ─── Tabs ──────────────────────────────────────────────────── */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-btn {
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition-base);
    margin-bottom: -1px;
}

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

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-base) ease-out;
}

/* ─── Utility ───────────────────────────────────────────────── */
.hidden { display: none !important; }
.text-green { color: var(--accent-green); }
.text-red { color: var(--accent-red); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.gap-12 { gap: 12px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }