:root {
    --color-bg: #f3f4f6;
    --color-card: #ffffff;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-primary: #10b981;
    /* Greenish */

    --tee-white-color: #ffffff;
    --tee-yellow-color: #fbbf24;
    --tee-blue-color: #3b82f6;
    --tee-red-color: #ef4444;
}

[data-theme="dark"] {
    --color-bg: #111827;
    --color-card: #1f2937;
    --color-text: #f9fafb;
    --color-text-light: #9ca3af;
    --color-primary: #34d399;

    --tee-white-color: #374151;
    /* Darker white for contrast */
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s;
}

.calculator-card {
    background-color: var(--color-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
    transition: background-color 0.3s;
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.header-row h1 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-text);
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.subtitle {
    margin: 0 0 2rem 0;
    color: var(--color-text-light);
    font-size: 0.9rem;
    text-align: left;
}

.input-group select {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    box-sizing: border-box;
    background-color: var(--color-card);
    color: var(--color-text);
    transition: border-color 0.2s;
}

.input-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.gender-toggle {
    display: flex;
    background-color: #e5e7eb;
    border-radius: 0.5rem;
    padding: 0.25rem;
    gap: 0.25rem;
}

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

.gender-toggle label {
    flex: 1;
    text-align: center;
    padding: 0.5rem;
    border-radius: 0.25rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text-light);
    transition: all 0.2s;
    margin-bottom: 0;
    /* Override input-group label margin */
}

.gender-toggle input[type="radio"]:checked+label {
    background-color: var(--color-card);
    color: var(--color-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .gender-toggle {
    background-color: #374151;
}

[data-theme="dark"] .gender-toggle input[type="radio"]:checked+label {
    background-color: #1f2937;
    color: var(--color-primary);
}

[data-theme="dark"] .input-group input,
[data-theme="dark"] .input-group select {
    border-color: #374151;
    background-color: #111827;
    color: #f3f4f6;
    color-scheme: dark;
    /* This fixes the chevron color in native selects */
}

[data-theme="dark"] .input-group input::placeholder {
    color: #9ca3af;
}

[data-theme="dark"] .tee-white {
    color: white;
    border-color: #4b5563;
}

.input-group {
    margin-bottom: 2rem;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 1rem;
    font-size: 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    box-sizing: border-box;
    transition: border-color 0.2s;
    text-align: center;
}

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

.tee-selection {
    margin-bottom: 2rem;
    text-align: left;
}

.tee-selection label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9rem;
}

.tee-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.tee-btn {
    padding: 0.75rem;
    border: 2px solid transparent;
    border-radius: 0.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.tee-btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.tee-btn.selected {
    transform: scale(1.05);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-color: var(--color-text);
}

.tee-white {
    background-color: var(--tee-white-color);
    color: black;
    border: 1px solid #e5e7eb;
}

.tee-yellow {
    background-color: var(--tee-yellow-color);
    color: black;
}

.tee-blue {
    background-color: var(--tee-blue-color);
}

.tee-red {
    background-color: var(--tee-red-color);
}

.result-display {
    background-color: #f9fafb;
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid #e5e7eb;
}

.result-display .label {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-display .value {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}