/* Modern design inspired by Arno Kamphuis Golf Design */
:root {
    --primary-color: #000000;
    --secondary-color: #555555;
    --accent-color: #333333;
    --background-color: #ffffff;
    --card-background: rgba(0, 0, 0, 0.05);
    --border-radius: 10px;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Montserrat', serif;
    background-color: var(--background-color);
    color: var(--primary-color);
    line-height: 1.6;
    font-size: 16px;
    font-weight: 400;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color);
}

/* Header */
.header {
    background-color: var(--background-color);
    color: var(--primary-color);
    padding: 3rem 0;
    text-align: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo-section {
    flex-shrink: 0;
}

.title-section {
    flex: 1;
    text-align: left;
}

.header-logo {
    max-height: 100px;
    max-width: 200px;
    width: auto;
    height: auto;
    object-fit: contain;
    opacity: 0.9;
    transition: var(--transition);
}

.header-logo:hover {
    opacity: 1;
}

.header-content h1 {
    font-family: 'Nanum Pen Script', cursive;
    font-size: 3.5rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    text-shadow: none;
}

.header-content h1 i {
    margin-right: 1rem;
    font-size: 3rem;
}

.header-content p {
    font-family: 'Montserrat', serif;
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--secondary-color);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Main Content */
.main {
    flex: 1;
    padding: 3rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Cards */
.card {
    background-color: var(--card-background);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.card h2 {
    font-family: 'Nanum Pen Script', cursive;
    font-size: 2.2rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.card h2 i {
    font-size: 1.8rem;
}

/* Form Styling */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.8rem;
}

/* Specific styling for image parameters to fit 4 columns */
.card:first-of-type .form-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* Specific styling for print settings to fit 4 columns */
.card:nth-of-type(2) .form-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* When screen is too narrow for 4 columns, use 2 columns */
@media (max-width: 1100px) {
    .card:first-of-type .form-grid,
    .card:nth-of-type(2) .form-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* On small screens, stack all fields vertically */
@media (max-width: 600px) {
    .card:first-of-type .form-grid,
    .card:nth-of-type(2) .form-grid {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-family: 'Montserrat', serif;
    font-weight: 500;
    margin-bottom: 0.6rem;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.form-group input,
.form-group select {
    font-family: 'Montserrat', serif;
    padding: 0.9rem;
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background-color: var(--background-color);
    color: var(--primary-color);
    transition: var(--transition);
    min-width: 0; /* Allow inputs to shrink in narrow containers */
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
    background-color: var(--background-color);
}

/* Buttons */
.btn-primary {
    font-family: 'Montserrat', serif;
    background-color: var(--primary-color);
    color: var(--background-color);
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    font-family: 'Montserrat', serif;
    background-color: var(--background-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-primary i,
.btn-secondary i {
    font-size: 1rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Results Section */
.results {
    display: none;
    animation: fadeIn 0.7s ease;
}

.results.show {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Result Items */
.result-item {
    background-color: var(--background-color);
    padding: 1.8rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.2rem;
    border: 2px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.result-item:hover {
    border-color: rgba(0, 0, 0, 0.3);
    box-shadow: var(--shadow);
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.result-title {
    font-family: 'Nanum Pen Script', cursive;
    font-size: 1.6rem;
    font-weight: 400;
    color: var(--primary-color);
}

.scale-badge {
    background-color: var(--primary-color);
    color: var(--background-color);
    padding: 0.4rem 0.8rem;
    border-radius: calc(var(--border-radius) / 2);
    font-family: 'Montserrat', serif;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.3px;
}

.result-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.detail-item {
    padding: 0.8rem;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: calc(var(--border-radius) / 2);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.detail-label {
    font-family: 'Montserrat', serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.detail-value {
    font-family: 'Montserrat', serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: var(--card-background);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin-top: 3rem;
}

.footer p {
    font-family: 'Montserrat', serif;
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 400;
}

/* Error States */
.form-group input:invalid {
    border-color: #666666;
}

.form-group input:invalid:focus {
    box-shadow: 0 0 0 3px rgba(102, 102, 102, 0.1);
}

/* Loading State */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: 2rem 1rem;
    }

    .header-layout {
        flex-direction: column;
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .title-section {
        text-align: center;
    }

    .header-logo {
        max-height: 80px;
        max-width: 160px;
    }

    .header-content h1 {
        font-size: 2.8rem;
    }

    .header-content h1 i {
        font-size: 2.4rem;
        margin-right: 0.8rem;
    }

    .header-content p {
        font-size: 1rem;
        padding: 0 1rem;
    }

    .main {
        padding: 2rem 1rem;
    }

    .card {
        padding: 2rem;
        margin-bottom: 1.5rem;
    }

    .card h2 {
        font-size: 1.9rem;
        gap: 0.6rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .card:first-of-type .form-grid,
    .card:nth-of-type(2) .form-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
    }

    .result-details {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
}

@media (max-width: 480px) {
    .header-layout {
        gap: 1rem;
    }

    .header-logo {
        max-height: 60px;
        max-width: 120px;
    }

    .header-content h1 {
        font-size: 2.4rem;
    }

    .header-content h1 i {
        font-size: 2rem;
    }

    .header-content p {
        font-size: 0.95rem;
    }

    .card {
        padding: 1.5rem;
    }

    .card h2 {
        font-size: 1.7rem;
    }

    .btn-primary {
        padding: 0.9rem 1.5rem;
        font-size: 1rem;
        width: 100%;
        justify-content: center;
    }

    .result-item {
        padding: 1.5rem;
    }
}

/* Animation for attention-grabbing elements */
@keyframes attention {
    0%, 100% {
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
}

.calculate-btn {
    animation: attention 3s infinite;
}

/* Smooth scrolling for better UX */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}