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

:root {
    /* Investor-Grade Dark Theme (Vercel/Linear inspired) */
    --bg-base: #000000;
    --bg-surface: #0a0a0a;
    --bg-surface-hover: #141414;
    --bg-surface-elevated: #111111;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.15);
    
    --text-primary: #ededed;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;

    --brand-primary: #f97316; /* Will be overridden by inline style if set */
    --brand-secondary: #fb923c;
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --info: #3b82f6;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.5), 0 2px 4px -1px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -2px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 20px rgba(249, 115, 22, 0.15); /* Brand colored glow */
    
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
    min-height: 100vh;
    /* Subtle mesh gradient background effect */
    background-image: 
        radial-gradient(ellipse at 15% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 85% 30%, rgba(255, 255, 255, 0.02) 0%, transparent 50%);
}

/* --- Layout --- */

.app-shell {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

/* --- Sidebar --- */

.sidebar {
    background: var(--bg-base);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 50;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 0.5rem 2rem 0.5rem;
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
}

.sidebar-brand strong {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.875rem;
}

.sidebar-nav a i {
    width: 18px;
    height: 18px;
    stroke-width: 2px;
}

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

.sidebar-nav a.is-active {
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

/* --- Content & Topbar --- */

.content {
    padding: 2rem 3rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
}

.topbar h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.02em;
}

.topbar p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.875rem;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.topbar-user img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
}

/* --- Metric Cards (Stripe/Linear style) --- */

.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.metric-card:hover {
    border-color: var(--border-strong);
}

.metric-card span {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.metric-card strong {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.metric-card i {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
}

/* --- Panels / Cards --- */

.panel-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
}

.panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.panel-span-12 { grid-column: span 12; }
.panel-span-8 { grid-column: span 8; }
.panel-span-6 { grid-column: span 6; }
.panel-span-4 { grid-column: span 4; }

.panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.panel-head h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

/* --- Tables --- */

.table-wrap {
    margin: 0 -1.5rem -1.5rem -1.5rem;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

th {
    text-align: left;
    padding: 0.75rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    position: sticky;
    top: 0;
}

td {
    padding: 0.875rem 1.5rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
    color: var(--text-primary);
}

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

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

/* --- Forms & Inputs --- */

.stack-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label span {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 0.625rem 0.75rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    transition: var(--transition-fast);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

input:hover, select:hover, textarea:hover {
    border-color: var(--border-strong);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--text-secondary);
    background: var(--bg-surface-elevated);
}

/* Override default select arrow */
select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px;
    padding-right: 2.5rem;
}

input[type="checkbox"] {
    accent-color: var(--brand-primary);
    width: 1rem;
    height: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-base);
    cursor: pointer;
}

/* --- Buttons --- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    border: 1px solid transparent;
}

.btn i {
    width: 16px;
    height: 16px;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-base);
    box-shadow: 0 2px 4px rgba(255,255,255,0.1);
}

.btn-primary:hover {
    background: #ffffff;
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-strong);
    color: var(--text-primary);
}

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

.btn-small {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
}

/* --- Components & Utils --- */

.tag {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid transparent;
}

.tag-active { background: var(--success-bg); color: var(--success); border-color: rgba(16, 185, 129, 0.2); }
.tag-expired, .tag-suspended { background: var(--danger-bg); color: var(--danger); border-color: rgba(239, 68, 68, 0.2); }

.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.2); }
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }

code {
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.8125rem;
    background: var(--bg-base);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
}

/* --- Login Page --- */

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-base);
    background-image: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.05) 0%, transparent 70%);
}

.login-panel {
    width: 100%;
    max-width: 400px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.brand-badge {
    background: linear-gradient(to right, var(--bg-surface-elevated), var(--bg-surface));
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-flex;
    margin-bottom: 1.5rem;
}

/* --- Modal --- */

.modal-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
    display: none; place-items: center;
    z-index: 1000; padding: 2rem;
}

.modal-backdrop.is-open { display: grid; }

.manual-modal {
    background: var(--bg-surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    width: 100%; max-width: 600px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.75);
}

.manual-modal-head {
    padding: 1.25rem 1.5rem;
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid var(--border-subtle);
}

.manual-modal-head h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
}

.manual-modal-kicker { 
    font-size: 0.7rem; 
    color: var(--text-tertiary); 
    margin-bottom: 0.25rem;
}

.manual-modal-body { padding: 1.5rem; }

.manual-text-block {
    background: var(--bg-base);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    white-space: pre-wrap;
    margin-bottom: 1.5rem;
    max-height: 300px;
    overflow-y: auto;
}

/* --- Custom Scrollbar for sleekness --- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* --- Responsive --- */

@media (max-width: 1024px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar { display: none; } /* Would need a mobile menu toggle in real life */
    .panel { grid-column: span 12; }
    .panel-span-8, .panel-span-6, .panel-span-4 { grid-column: span 12; }
}

@media (max-width: 640px) {
    .content { padding: 1.5rem 1rem; }
    .topbar { flex-direction: column; gap: 1rem; }
}