:root {
    /* Color Palette - Premium Dark/Vibrant */
    --primary-hue: 250;
    /* Deep Purple */
    --secondary-hue: 320;
    /* Pink/Magenta */
    --accent-hue: 190;
    /* Cyan */

    --bg-dark: hsl(220, 20%, 10%);
    --bg-card: hsla(220, 20%, 18%, 0.7);
    --text-main: hsl(0, 0%, 95%);
    --text-muted: hsl(220, 10%, 70%);

    --primary: hsl(var(--primary-hue), 70%, 60%);
    --secondary: hsl(var(--secondary-hue), 70%, 60%);
    --accent: hsl(var(--accent-hue), 80%, 60%);

    --glass-border: hsla(0, 0%, 100%, 0.1);
    --glass-highlight: hsla(0, 0%, 100%, 0.05);

    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;

    --shadow-lg: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(circle at 10% 20%, hsla(var(--primary-hue), 60%, 20%, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, hsla(var(--secondary-hue), 60%, 20%, 0.4) 0%, transparent 40%);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.6;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding: 1rem 2rem;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
        margin-bottom: 2rem;
    }
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
    flex-wrap: wrap;
    justify-content: center;
}

@media (max-width: 768px) {
    nav ul {
        gap: 1rem;
    }
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
    color: var(--text-main);
}

/* Cards & Glassmorphism */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: hsla(var(--primary-hue), 70%, 60%, 0.3);
}

/* Dashboard Layout (Bento Grid) */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    /* Left col wider than right col, or equal. Testing 1.5fr / 1fr */
    gap: 2rem;
    align-items: start;
}

.dashboard-col {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
        /* Stack on mobile/tablet */
    }
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    align-items: start;
}

/* Inputs & Forms (Better Readability) */
input,
select,
textarea {
    font-size: 1.1rem !important;
    /* Larger text for better readability & prevents iOS zoom */
    padding: 1rem !important;
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
        /* Force single column on mobile */
        gap: 1rem;
    }

    .card {
        padding: 1.5rem;
    }
}

/* Typography & Elements */
h1,
h2,
h3 {
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px hsla(var(--primary-hue), 70%, 50%, 0.4);
    transition: filter 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
}

/* Utilities */
.text-gradient {
    background: linear-gradient(to right, var(--accent), var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}