/* Steampunk UI Theme */
:root {
    --bg-dark: #120e0b;
    --text-main: #e6cba8;
    --text-muted: #a38c6b;
    --accent: #b5a642; /* Brass */
    --accent-glow: rgba(181, 166, 66, 0.4);
    --accent-hover: #d4af37;
    --card-bg: #2a201a;
    --card-border: #b87333; /* Copper */
    --error: #c53030;
    --leather: #3e2723;
}

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

body {
    font-family: 'Playfair Display', serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    position: relative;
    /* Vintage vignette gradient */
    background: radial-gradient(circle at center, #2e1b0f 0%, #120e0b 80%);
}

#particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 520px;
    padding: 1.5rem 2rem; /* Reduced padding */
    background: repeating-linear-gradient(45deg, rgba(30, 20, 15, 0.8), rgba(30, 20, 15, 0.8) 10px, rgba(40, 25, 20, 0.8) 10px, rgba(40, 25, 20, 0.8) 20px);
    border: 3px solid var(--accent);
    border-radius: 8px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.8),
        inset 0 0 15px rgba(255, 255, 255, 0.05),
        0 0 0 4px var(--card-border),
        0 0 0 10px rgba(0,0,0,0.5);
    background-color: var(--card-bg);
}

.container::before {
    /* Rivet decorations */
    content: '';
    position: absolute;
    top: 6px; bottom: 6px; left: 6px; right: 6px;
    border: 1px dashed var(--accent);
    pointer-events: none;
}

.header {
    text-align: center;
    margin-bottom: 1.2rem; /* Reduced margin */
    position: relative;
}

.header h1 {
    font-size: 2.2rem; /* Reduced size */
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--accent);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8), -1px -1px 0 rgba(255,255,255,0.2);
    letter-spacing: 0.02em;
}

.header p {
    color: var(--text-muted);
    font-size: 1rem;
    font-style: italic;
    letter-spacing: 0.05em;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1rem; /* Reduced gap */
    transition: opacity 0.5s ease;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-align: center;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.input-group input {
    background: #1a1512;
    border: 2px solid var(--card-border);
    color: #ffd700;
    padding: 0.8rem; /* Reduced padding */
    border-radius: 4px;
    font-size: 1.4rem;
    font-family: 'Special Elite', monospace;
    font-weight: 400;
    letter-spacing: 0.3em;
    outline: none;
    transition: all 0.3s ease;
    text-align: center;
    box-shadow: inset 0 3px 10px rgba(0,0,0,0.8);
}

.input-group input:focus {
    border-color: var(--accent-hover);
    box-shadow: inset 0 3px 10px rgba(0,0,0,0.8), 0 0 10px var(--accent-glow);
}

.toggle-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-top: 0.2rem;
}

.toggle-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-align: center;
}

.toggle-container {
    display: flex;
    background: #1a1512;
    border: 2px solid var(--card-border);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: inset 0 3px 5px rgba(0,0,0,0.8);
}

.toggle-container input[type="radio"] {
    display: none;
}

.toggle-btn {
    flex: 1;
    text-align: center;
    padding: 0.8rem; /* Reduced padding */
    font-size: 1rem;
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    border-right: 1px solid rgba(184, 115, 51, 0.3);
}

.toggle-btn:last-child {
    border-right: none;
}

.toggle-container input[type="radio"]:checked + .toggle-btn {
    color: var(--bg-dark);
    background: linear-gradient(180deg, #d4af37 0%, #b5a642 100%);
    font-weight: 700;
    box-shadow: inset 0 -2px 5px rgba(0,0,0,0.3), inset 0 2px 2px rgba(255,255,255,0.4);
}

.error-message {
    color: var(--error);
    font-size: 0.9rem;
    font-weight: 700;
    text-align: center;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    font-family: 'Special Elite', monospace;
}

.error-message.visible {
    opacity: 1;
    max-height: 30px;
    margin-top: 0.3rem;
}

.btn {
    background: linear-gradient(to bottom, var(--card-border) 0%, #874b1e 100%);
    color: #ffeba1;
    border: 2px solid #5a3111;
    border-top-color: #d89664;
    border-left-color: #d89664;
    padding: 0.8rem; /* Reduced padding */
    border-radius: 6px;
    font-size: 1.1rem;
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.1s ease;
    box-shadow: 0 4px 0 #3e2211, 0 6px 10px rgba(0,0,0,0.5);
    text-transform: uppercase;
}

.btn:active {
    transform: translateY(4px);
    box-shadow: 0 0 0 #3e2211, 0 2px 5px rgba(0,0,0,0.5);
    background: linear-gradient(to bottom, #874b1e 0%, var(--card-border) 100%);
}

.btn-secondary {
    background: linear-gradient(to bottom, #4a4a4a 0%, #2b2b2b 100%);
    color: #dcdcdc;
    border-color: #1a1a1a;
    border-top-color: #6a6a6a;
    border-left-color: #6a6a6a;
    box-shadow: 0 4px 0 #151515, 0 6px 10px rgba(0,0,0,0.5);
}

.btn-secondary:active {
    box-shadow: 0 0 0 #151515, 0 2px 5px rgba(0,0,0,0.5);
    background: linear-gradient(to bottom, #2b2b2b 0%, #4a4a4a 100%);
}

.results-section {
    display: flex;
    flex-direction: column;
    gap: 0.8rem; /* Reduced gap */
    opacity: 1;
    transition: all 0.5s ease;
}

.results-section.hidden {
    display: none;
    opacity: 0;
}

.stat-card {
    background: rgba(20, 15, 10, 0.8);
    border: 2px solid var(--accent);
    padding: 0.8rem 1.5rem; /* Reduced padding */
    border-radius: 4px;
    text-align: center;
    position: relative;
    box-shadow: inset 0 5px 15px rgba(0,0,0,0.9), 0 2px 4px rgba(255,255,255,0.05);
}

.stat-card h2 {
    font-size: 0.9rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.2rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
}

.stat-card .value {
    font-size: 2.2rem; /* Reduced size */
    font-family: 'Special Elite', monospace;
    font-weight: 400;
    color: #ffeba1;
    text-shadow: 0 0 10px rgba(255, 235, 161, 0.3), 2px 2px 4px rgba(0,0,0,0.8);
}

.stat-card .sub-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--card-border);
    font-family: 'Playfair Display', serif;
    font-style: italic;
}