:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg: #f9fafb;
    --card-bg: #ffffff;
    --text: #111827;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

/* Auth Page */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.5rem;
}

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

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

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

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

input,
select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s;
}

input:focus {
    border-color: var(--primary);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

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

.auth-toggle {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
}

#toggle-link {
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
}

/* Dashboard */
.dashboard-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}

.secondary-charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.skill-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.skill-row label {
    margin-bottom: 0;
}

.skill-row select {
    width: auto;
    min-width: 120px;
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
}

.chart-inner {
    height: 100%;
    min-width: 100%;
}

.secondary-charts-grid .chart-container {
    height: 250px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.modal-content {
    max-width: 500px;
    width: 100%;
    margin-bottom: 0;
}

.skill-input {
    margin-bottom: 0.75rem;
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: #1f2937;
    color: white;
    border-radius: 8px;
    display: none;
    z-index: 1000;
}

/* Stats Board */
.stats-board-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.stat-item {
    padding: 1rem;
    background: #f3f4f6;
    border-radius: 10px;
    text-align: center;
    border: 1px solid var(--border);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-progress-bar {
    height: 6px;
    background: #e5e7eb;
    border-radius: 3px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.stat-progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.5s ease-out;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}