@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* Main CSS Setup - Design Tokens (SastaOTP) */
:root {
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --border-radius-xs: 8px; /* radius.xs */
    --border-radius-sm: 12px; /* radius.sm */
    --border-radius-md: 16px; /* radius.md */
    --border-radius-lg: 9999px; /* radius.lg */
    --transition-fast: 150ms ease; /* motion.duration.instant */
    --transition-smooth: 200ms cubic-bezier(0.4, 0, 0.2, 1); /* motion.duration.fast */
    --transition-normal: 400ms cubic-bezier(0.4, 0, 0.2, 1); /* motion.duration.normal */
    --shadow-sm: rgba(0, 0, 0, 0.05) 0px 2px 8px;
    --shadow-md: rgba(0, 0, 0, 0.2) 0px 10px 15px -3px; /* shadow.1 */
    --shadow-lg: rgba(0, 0, 0, 0.2) 0px 10px 15px -3px; /* shadow.1 */
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-heading);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

/* Glassmorphism Classes */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

/* Buttons */
.btn-premium {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #ffffff;
    border: none;
    border-radius: var(--border-radius-sm);
    padding: 10px 24px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(100, 80, 250, 0.3);
    transition: all var(--transition-smooth);
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(100, 80, 250, 0.4);
    color: #ffffff;
}

.btn-premium-outline {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    border-radius: var(--border-radius-sm);
    padding: 8px 22px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-smooth);
}

.btn-premium-outline:hover {
    background: var(--accent-primary);
    color: #ffffff;
}

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

.main-content {
    flex: 1;
    padding: 40px;
    margin-left: 280px; /* Sidebar width */
    transition: margin-left var(--transition-smooth);
}

/* Sidebar structure */
.sidebar {
    width: 280px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 30px 20px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: background var(--transition-smooth), border-color var(--transition-smooth);
}

/* Form Styling */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-control-premium {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control-premium:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(100, 80, 250, 0.15);
}