:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #8b5cf6; /* Violet */
    --accent-hover: #7c3aed;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.15) 0%, transparent 20%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Authentication Page */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
}

.auth-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    padding: 2.5rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

.auth-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: center;
    background: linear-gradient(to right, #8b5cf6, #3b82f6);
    -webkit-background-clip: text;
    color: transparent;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(to right, var(--accent-color), #6366f1);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
    margin-top: 1rem;
}

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

/* Dashboard */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    background: var(--card-bg);
    padding: 1rem 2rem;
    border-radius: 1rem;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #10b981, #3b82f6);
    -webkit-background-clip: text;
    color: transparent;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--card-border);
}

.stat-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
}

.stat-value.profit {
    color: var(--success-color);
}

.stat-value.loss {
    color: var(--danger-color);
}

.controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.search-bar {
    max-width: 300px;
}

.data-table-wrapper {
    background: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid var(--card-border);
    overflow: hidden;
}

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

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

th {
    background: rgba(15, 23, 42, 0.4);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
}

tr.low-stock {
    background: rgba(239, 68, 68, 0.1);
}

tr.low-stock td {
    color: #fca5a5;
}

.action-btn {
    padding: 0.4rem 0.8rem;
    border-radius: 0.4rem;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    margin-right: 0.5rem;
    transition: background 0.2s;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.btn-add { background: rgba(16, 185, 129, 0.2); color: var(--success-color); }
.btn-sub { background: rgba(239, 68, 68, 0.2); color: var(--danger-color); }
.btn-edit { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.btn-delete { background: rgba(239, 68, 68, 0.2); color: #f87171; }

.btn-add:hover { background: rgba(16, 185, 129, 0.3); }
.btn-sub:hover { background: rgba(239, 68, 68, 0.3); }

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: #1e293b;
    padding: 2rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 500px;
    border: 1px solid var(--card-border);
    transform: translateY(20px);
    transition: transform 0.2s;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

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