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

:root {
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #059669;
    --danger-color: #dc2626;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

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

.sidebar {
    width: 250px;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 2.5rem;
    overflow-y: auto;
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

h1 { font-size: 1.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 1.25rem; margin-bottom: 1rem; }
h3 { font-size: 1rem; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; }

/* Navigation */
.brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s ease;
    margin-bottom: 0.5rem;
}

.nav-link:hover, .nav-link.active {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

.user-profile {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Cards & Surfaces */
.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.625rem 1rem;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

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

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

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

.btn-danger-outline {
    color: var(--danger-color);
    border-color: #fca5a5;
    background-color: transparent;
}

.btn-danger-outline:hover {
    background-color: #fef2f2;
}

/* Tables */
.table-container {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    background-color: #f8fafc;
}

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

tr:hover td {
    background-color: #f8fafc;
}

.badge {
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger { background: #fee2e2; color: #991b1b; }

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(2px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-backdrop.show { display: flex; }

.modal {
    background: var(--surface-color);
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease-out;
}

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

.modal-title { font-size: 1.125rem; margin: 0; }

.modal-body { padding: 1.5rem; max-height: 70vh; overflow-y: auto; }

.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.close-btn {
    background: none; border: none; font-size: 1.5rem; color: var(--text-secondary); cursor: pointer;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Authentication Center */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--bg-color);
}

.auth-card {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

/* AI Voice Input Box */
.ai-voice-box {
    background: #eff6ff;
    border: 1px dashed #93c5fd;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.ai-header span {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
}

#voiceResult {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.875rem;
}