/* ============================================
   WhatsApp Pro Platform - Professional Design
   Inspired by WhatsApp Web + modern dashboard
   ============================================ */

:root {
    --wa-green: #25D366;
    --wa-green-dark: #128C7E;
    --wa-green-light: #DCF8C6;
    --wa-teal: #075E54;
    --wa-bg: #0B141A;
    --wa-sidebar: #111B21;
    --wa-panel: #202C33;
    --wa-chat-bg: #0B141A;
    --wa-text: #E9EDEF;
    --wa-text-secondary: #8696A0;
    --wa-border: #2A3942;
    --wa-input: #2A3942;
    --wa-hover: #202C33;
    --wa-danger: #EA4335;
    --wa-warning: #F4B400;
    --wa-success: #25D366;
    --wa-info: #34B7F1;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font);
    background: var(--wa-bg);
    color: var(--wa-text);
    min-height: 100vh;
    line-height: 1.5;
}

a {
    color: var(--wa-green);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

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

.sidebar {
    width: 280px;
    background: var(--wa-sidebar);
    border-right: 1px solid var(--wa-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    background: var(--wa-teal);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header .logo {
    width: 42px;
    height: 42px;
    background: var(--wa-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    font-weight: bold;
}

.sidebar-header h1 {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 24px;
    color: var(--wa-text-secondary);
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--wa-hover);
    color: var(--wa-text);
    text-decoration: none;
}

.nav-item.active {
    background: var(--wa-panel);
    color: var(--wa-green);
    border-left-color: var(--wa-green);
}

.nav-item i, .nav-item .icon {
    width: 24px;
    text-align: center;
    font-size: 18px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--wa-border);
    font-size: 13px;
    color: var(--wa-text-secondary);
}

.main-content {
    flex: 1;
    margin-left: 280px;
    min-height: 100vh;
    background: var(--wa-bg);
}

.topbar {
    background: var(--wa-panel);
    padding: 16px 28px;
    border-bottom: 1px solid var(--wa-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar h2 {
    font-size: 20px;
    font-weight: 600;
}

.topbar-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.content-area {
    padding: 24px 28px;
}

/* ========== Cards & Stats ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--wa-panel);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--wa-border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-card .label {
    font-size: 13px;
    color: var(--wa-text-secondary);
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--wa-text);
}

.stat-card .icon-wrap {
    float: right;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.stat-card.green .icon-wrap { background: rgba(37, 211, 102, 0.15); color: var(--wa-green); }
.stat-card.blue .icon-wrap { background: rgba(52, 183, 241, 0.15); color: var(--wa-info); }
.stat-card.orange .icon-wrap { background: rgba(244, 180, 0, 0.15); color: var(--wa-warning); }
.stat-card.red .icon-wrap { background: rgba(234, 67, 53, 0.15); color: var(--wa-danger); }

/* ========== Tables ========== */
.card {
    background: var(--wa-panel);
    border-radius: var(--radius);
    border: 1px solid var(--wa-border);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--wa-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--wa-sidebar);
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.card-body {
    padding: 0;
}

.table-responsive {
    overflow-x: auto;
}

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

th, td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--wa-border);
}

th {
    background: var(--wa-sidebar);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--wa-text-secondary);
    font-weight: 600;
}

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

tr:last-child td {
    border-bottom: none;
}

/* ========== Forms ========== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--wa-text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 14px;
    background: var(--wa-input);
    border: 1px solid var(--wa-border);
    border-radius: var(--radius);
    color: var(--wa-text);
    font-size: 15px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--wa-green);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238696A0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--wa-green);
    color: #111;
}
.btn-primary:hover {
    background: #20bd5a;
    color: #111;
}

.btn-secondary {
    background: var(--wa-panel);
    color: var(--wa-text);
    border: 1px solid var(--wa-border);
}
.btn-secondary:hover {
    background: var(--wa-hover);
}

.btn-danger {
    background: var(--wa-danger);
    color: #fff;
}
.btn-danger:hover {
    background: #d33426;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
}

/* ========== Badges ========== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: rgba(37,211,102,0.2); color: var(--wa-green); }
.badge-warning { background: rgba(244,180,0,0.2); color: var(--wa-warning); }
.badge-danger  { background: rgba(234,67,53,0.2); color: var(--wa-danger); }
.badge-info    { background: rgba(52,183,241,0.2); color: var(--wa-info); }
.badge-secondary { background: rgba(134,150,160,0.2); color: var(--wa-text-secondary); }

/* ========== Alerts / Flash ========== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(37,211,102,0.15);
    border: 1px solid rgba(37,211,102,0.3);
    color: var(--wa-green);
}
.alert-error, .alert-danger {
    background: rgba(234,67,53,0.15);
    border: 1px solid rgba(234,67,53,0.3);
    color: #ff8a80;
}
.alert-info {
    background: rgba(52,183,241,0.15);
    border: 1px solid rgba(52,183,241,0.3);
    color: var(--wa-info);
}

/* ========== Chat UI (WhatsApp style) ========== */
.chat-container {
    display: flex;
    height: calc(100vh - 80px);
    background: var(--wa-chat-bg);
}

.chat-sidebar {
    width: 360px;
    background: var(--wa-sidebar);
    border-right: 1px solid var(--wa-border);
    display: flex;
    flex-direction: column;
}

.chat-search {
    padding: 12px 16px;
    background: var(--wa-panel);
}

.chat-search input {
    width: 100%;
    padding: 10px 14px 10px 40px;
    background: var(--wa-input);
    border: none;
    border-radius: 8px;
    color: var(--wa-text);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%238696A0' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242.656a5 5 0 1 1 0-10 5 5 0 0 1 0 10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 12px center;
}

.chat-list {
    flex: 1;
    overflow-y: auto;
}

.chat-item {
    display: flex;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    transition: background 0.15s;
}

.chat-item:hover, .chat-item.active {
    background: var(--wa-panel);
}

.chat-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--wa-teal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
    color: #fff;
    flex-shrink: 0;
}

.chat-info {
    flex: 1;
    min-width: 0;
}

.chat-info .name {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-info .preview {
    font-size: 13px;
    color: var(--wa-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-meta {
    text-align: right;
    font-size: 12px;
    color: var(--wa-text-secondary);
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #0B141A;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23111b21' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.chat-header {
    padding: 12px 20px;
    background: var(--wa-panel);
    border-bottom: 1px solid var(--wa-border);
    display: flex;
    align-items: center;
    gap: 14px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.message-bubble {
    max-width: 65%;
    padding: 8px 12px;
    border-radius: 8px;
    position: relative;
    font-size: 14.5px;
    line-height: 1.4;
    word-wrap: break-word;
}

.message-bubble.outbound {
    align-self: flex-end;
    background: var(--wa-green-light);
    color: #111;
    border-bottom-right-radius: 2px;
}

.message-bubble.inbound {
    align-self: flex-start;
    background: var(--wa-panel);
    color: var(--wa-text);
    border-bottom-left-radius: 2px;
}

.message-bubble .time {
    font-size: 11px;
    opacity: 0.7;
    margin-top: 4px;
    text-align: right;
}

.message-bubble.outbound .time {
    color: #555;
}

.chat-input-area {
    padding: 12px 16px;
    background: var(--wa-panel);
    display: flex;
    gap: 12px;
    align-items: center;
}

.chat-input-area input {
    flex: 1;
    padding: 12px 16px;
    background: var(--wa-input);
    border: none;
    border-radius: 24px;
    color: var(--wa-text);
    font-size: 15px;
}

.chat-input-area input:focus {
    outline: none;
}

.btn-send {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--wa-green);
    border: none;
    color: #111;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-send:hover {
    background: #20bd5a;
}

/* ========== Login ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #075E54 0%, #128C7E 50%, #25D366 100%);
}

.login-box {
    background: var(--wa-sidebar);
    padding: 40px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.login-box .logo-big {
    width: 72px;
    height: 72px;
    background: var(--wa-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    margin: 0 auto 20px;
    color: #fff;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 24px;
}

.login-box p {
    text-align: center;
    color: var(--wa-text-secondary);
    margin-bottom: 28px;
    font-size: 14px;
}

/* ========== Utilities ========== */
.text-muted { color: var(--wa-text-secondary); }
.text-success { color: var(--wa-green); }
.text-danger { color: var(--wa-danger); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.d-flex { display: flex; }
.gap-2 { gap: 12px; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.w-100 { width: 100%; }

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--wa-text-secondary);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 900px) {
    .sidebar {
        width: 70px;
    }
    .sidebar-header h1, .nav-item span, .sidebar-footer {
        display: none;
    }
    .nav-item {
        justify-content: center;
        padding: 14px;
    }
    .main-content {
        margin-left: 70px;
    }
    .chat-sidebar {
        width: 100%;
        position: absolute;
        z-index: 10;
    }
    .chat-main {
        display: none;
    }
    .chat-main.active {
        display: flex;
        position: absolute;
        inset: 0;
        z-index: 20;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--wa-border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #3b4a54;
}