:root {
    /* Brand Colors - Jaguar Top Trumps Inspired */
    --color-brand-black: #000000;
    --color-brand-charcoal: #111111;
    --color-brand-white: #ffffff;
    --color-brand-light-grey: #f2f2f2;
    --color-brand-dark-grey: #333333;

    --color-primary-dark: var(--color-brand-black);
    --color-surface: rgba(17, 17, 17, 0.95);
    --color-surface-light: rgba(255, 255, 255, 0.1);

    --color-text-main: var(--color-brand-white);
    --color-text-muted: #888888;
    --color-text-dark: var(--color-brand-black);

    --font-heading: 'Montserrat', system-ui, sans-serif;
    --font-ui: 'Montserrat', system-ui, sans-serif;

    --border-radius-soft: 0px;
    /* Perfectly sharp corners */
    --transition-snappy: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-ui);
    background-color: var(--color-brand-black);
    color: var(--color-text-main);
    overflow-y: auto;
    /* Allow scrolling */
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background: var(--color-brand-black);
}

.app-container {
    width: 100%;
    max-width: 480px;
    /* Mobile first */
    height: 100vh;
    position: relative;
    overflow-y: auto;
    overflow-x: hidden;
    background: radial-gradient(circle at center, var(--color-brand-dark-grey) 0%, var(--color-brand-black) 100%);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.9);
}

/* Glassmorphism Panels */
.glass-panel {
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-surface-light);
    border-radius: var(--border-radius-soft);
    padding: 2rem;
}

/* Typography */
.brand-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.2rem;
    text-transform: uppercase;
    letter-spacing: 6px;
    color: var(--color-brand-white);
}

.brand-subtitle {
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: 3px;
    margin-bottom: 2.5rem;
}

/* Views Management */
.view {
    display: none;
    flex-direction: column;
    padding: 1.5rem;
    height: 100%;
    animation: fadeIn 0.4s ease forwards;
}

.view.active-view {
    display: flex;
}

/* Buttons */
button {
    font-family: var(--font-ui);
    font-size: 1rem;
    font-weight: 700;
    padding: 1.2rem 1.5rem;
    border-radius: var(--border-radius-soft);
    border: none;
    cursor: pointer;
    transition: var(--transition-snappy);
    text-transform: uppercase;
    letter-spacing: 2px;
    width: 100%;
    margin-bottom: 1rem;
}

.primary-btn {
    background: var(--color-brand-white);
    color: var(--color-brand-black);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

.primary-btn:hover,
.primary-btn:active {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
    background: var(--color-brand-light-grey);
}

.secondary-btn {
    background: transparent;
    color: var(--color-brand-white);
    border: 2px solid var(--color-brand-white);
}

.secondary-btn:hover,
.secondary-btn:active {
    background: rgba(255, 255, 255, 0.1);
}

/* Navigation */
.nav-btn {
    background: transparent;
    border: none;
    color: var(--color-brand-white);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.2rem;
    padding: 0;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    width: auto;
    margin-bottom: 0;
    text-align: left;
}

.nav-btn:hover {
    color: var(--color-text-muted);
}

/* Settings Forms */
.setting-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.setting-group label {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.settings-select {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1rem;
    font-family: var(--font-ui);
    font-size: 1rem;
    cursor: pointer;
}

.settings-select option {
    background: var(--color-brand-black);
    color: white;
}

/* Forms */
input {
    width: 100%;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-soft);
    color: white;
    font-family: var(--font-ui);
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--color-brand-white);
    background: rgba(255, 255, 255, 0.1);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}