/* ============================================
   INSAITE DIGITAL - EMAIL SIGNATURES SYSTEM
   Modern Dark Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --bg-input: #1a1a26;
    --border: #2a2a3a;
    --border-focus: #6c5ce7;
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent: #6c5ce7;
    --accent-hover: #7d6ff0;
    --accent-glow: rgba(108, 92, 231, 0.15);
    --success: #00d1a0;
    --success-bg: rgba(0, 209, 160, 0.1);
    --danger: #ff6b6b;
    --danger-bg: rgba(255, 107, 107, 0.1);
    --warning: #ffa94d;
    --warning-bg: rgba(255, 169, 77, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 2px 20px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(0, 209, 160, 0.05) 0%, transparent 50%),
        var(--bg-primary);
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.login-logo {
    text-align: center;
    margin-bottom: 36px;
}

.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.login-logo span {
    color: var(--accent);
}

.login-logo p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 6px;
}

/* ============================================
   LAYOUT - SIDEBAR + CONTENT
   ============================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    top: 0;
    left: 0;
    z-index: 100;
}

.sidebar-brand {
    padding: 0 24px;
    margin-bottom: 32px;
}

.sidebar-brand h2 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.sidebar-brand h2 span {
    color: var(--accent);
}

.sidebar-brand small {
    color: var(--text-muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: block;
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 0 12px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
}

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

.sidebar-nav a.active {
    background: var(--accent-glow);
    color: var(--accent);
}

.sidebar-nav a svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke-width: 1.8;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
}

.sidebar-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent-glow);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8rem;
    flex-shrink: 0;
}

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

.sidebar-user-name {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 32px 40px;
    max-width: calc(100% - 260px);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 4px;
}

.page-header-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

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

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
}

.stat-card .stat-label {
    color: var(--text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 500;
}

.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-top: 4px;
    letter-spacing: -1px;
}

.stat-card .stat-value.accent { color: var(--accent); }
.stat-card .stat-value.success { color: var(--success); }
.stat-card .stat-value.warning { color: var(--warning); }

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9rem;
    transition: var(--transition);
    outline: none;
}

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

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

.form-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}

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

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

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: rgba(255, 107, 107, 0.2);
}

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

.btn-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: rgba(0, 209, 160, 0.2);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.82rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
    width: 100%;
    justify-content: center;
}

/* ============================================
   TABLE
   ============================================ */
.table-wrapper {
    overflow-x: auto;
}

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

table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-bottom: 1px solid var(--border);
}

table td {
    padding: 14px 16px;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

table tbody tr {
    transition: var(--transition);
}

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

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

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-accent {
    background: var(--accent-glow);
    color: var(--accent);
}

/* ============================================
   ALERTS / FLASH MESSAGES
   ============================================ */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(0, 209, 160, 0.2);
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(255, 107, 107, 0.2);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(255, 169, 77, 0.2);
}

/* ============================================
   URL COPY BOX
   ============================================ */
.url-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin-top: 4px;
}

.url-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    outline: none;
}

.url-box .copy-btn {
    padding: 6px 12px;
    background: var(--accent-glow);
    color: var(--accent);
    border: none;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    font-family: 'DM Sans', sans-serif;
    transition: var(--transition);
    white-space: nowrap;
}

.url-box .copy-btn:hover {
    background: var(--accent);
    color: #fff;
}

/* ============================================
   IMAGE PREVIEW
   ============================================ */
.img-preview {
    background: var(--bg-input);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.img-preview:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.img-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: 6px;
}

.img-preview span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============================================
   SIGNATURE GRID
   ============================================ */
.sig-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.sig-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.sig-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.1);
    transform: translateY(-2px);
}

.sig-card-img {
    background: var(--bg-input);
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    border-bottom: 1px solid var(--border);
}

.sig-card-img img {
    max-width: 100%;
    max-height: 150px;
}

.sig-card-body {
    padding: 16px;
}

.sig-card-email {
    font-weight: 600;
    font-size: 0.92rem;
    margin-bottom: 2px;
}

.sig-card-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 12px;
}

.sig-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.sig-card-actions {
    display: flex;
    gap: 8px;
}

/* ============================================
   FILE INPUT CUSTOM
   ============================================ */
.file-input-wrapper {
    position: relative;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state svg {
    width: 56px;
    height: 56px;
    color: var(--text-muted);
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.empty-state p {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 20px;
}

/* ============================================
   MODAL / CONFIRM
   ============================================ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 440px;
    width: 100%;
    margin: 20px;
    box-shadow: var(--shadow-lg);
}

.modal-box h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.modal-box p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 20px;
    }
    .sig-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .login-card {
        padding: 32px 24px;
    }
}