/* Core Variables and Design System (Kinetic Obsidian) */
:root {
    --background: #10131a;
    --surface: #10131a;
    --surface-container-low: #191c22;
    --surface-container: #1d2026;
    --surface-container-high: #272a31;
    --surface-container-highest: #32353c;
    
    --on-surface: #e1e2eb;
    --on-surface-variant: #c6c6cb;
    
    --primary: #98cbff;
    --primary-container: #001222;
    --on-primary-fixed: #001d33;
    --primary-fixed-dim: #98cbff;
    
    --secondary: #4ae183;
    --tertiary: #deb7ff;
    
    --outline-variant: #45474b;
    --outline: #8f9095;
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--background);
    color: var(--on-surface);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

.hologram-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 163, 255, 0.05) 0%, transparent 60%);
    background-size: 40px 40px;
    background-image: 
        linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
    z-index: -1;
}

.container {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.glass-panel {
    background: rgba(29, 32, 38, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 12px;
    border: 1px solid rgba(69, 71, 75, 0.15);
    box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.5);
}

.login-card {
    padding: 3rem;
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.display-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--on-surface);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--on-surface-variant);
    font-size: 0.875rem;
    margin-bottom: 2rem;
}

/* Radio Toggle */
.role-selector {
    display: flex;
    position: relative;
    background: var(--surface-container-high);
    border-radius: 9999px;
    padding: 4px;
    margin-bottom: 2rem;
}

.role-selector input[type="radio"] {
    display: none;
}

.role-selector label {
    flex: 1;
    text-align: center;
    padding: 10px 0;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--on-surface-variant);
    cursor: pointer;
    z-index: 2;
    transition: color 0.3s ease;
}

.role-selector input[type="radio"]:checked + label {
    color: var(--on-primary-fixed);
}

.slider {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    background: var(--primary-fixed-dim);
    border-radius: 9999px;
    z-index: 1;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#role-admin:checked ~ .slider {
    transform: translateX(100%);
}

.input-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    margin-bottom: 0.5rem;
}

.input-group input {
    width: 100%;
    background: var(--surface-container-highest);
    border: 1px solid var(--outline-variant);
    color: var(--on-surface);
    padding: 12px 16px;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.2s, background 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface-container-high);
}

.btn-primary {
    width: 100%;
    background: var(--primary-fixed-dim);
    color: var(--on-primary-fixed);
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: filter 0.2s;
    margin-top: 1rem;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.error-msg {
    margin-top: 1rem;
    color: var(--error);
    font-size: 0.875rem;
}

/* Precision Mobile Alignment */
@media (max-width: 640px) {
    header {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
        padding-top: 1.5rem !important;
        padding-bottom: 1.5rem !important;
    }
    
    .feature-points-wrapper {
        display: flex;
        flex-direction: column;
        gap: 1.25rem;
        width: fit-content;
        margin: 1.5rem auto 0;
        text-align: left;
    }
    
    .feature-point {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        transition: transform 0.2s ease;
    }
}

/* Base Utility Classes for Landing Page (Transferred from HTML styles) */
.bg-6dof {
    background-image: url('../assets/images/bg_6dof.png') !important;
    background-size: cover;
    background-position: center;
    background-attachment: fixed !important;
}
.glass-panel {
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}
.hero-gradient {
    background: radial-gradient(circle at 50% 50%, rgba(0, 151, 178, 0.1) 0%, transparent 70%);
}