:root {
    --bg-color: #f5f5f7; /* iOS-like light grey */
    --card-bg: #ffffff;
    --text-color: #1d1d1f;
    --secondary-text: #86868b;
    --accent-color: #0071e3;
    --pill-bg: #e5e5ea;
    --pill-active-bg: #1d1d1f;
    --pill-active-text: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --modal-overlay: rgba(0, 0, 0, 0.5);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

header {
    padding: 2rem 1rem 1rem;
    text-align: center;
    background-color: var(--bg-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

h1.site-title {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

/* Horizontal Scrollable Segmented Control */
.filter-container {
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    padding-bottom: 0.5rem;
    /* Hide scrollbar */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none;  /* IE 10+ */
}

.filter-container::-webkit-scrollbar {
    display: none; /* WebKit */
}

.segmented-control {
    display: inline-flex;
    gap: 0.5rem;
    padding: 0 1rem;
}

.filter-pill {
    background-color: var(--pill-bg);
    color: var(--text-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 999px; /* Pill shape */
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.filter-pill:hover {
    background-color: #d1d1d6;
}

.filter-pill.active {
    background-color: var(--pill-active-bg);
    color: var(--pill-active-text);
}

/* Watch Grid */
main {
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.watch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.watch-card {
    background-color: var(--card-bg);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.watch-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.watch-card img {
    width: 100%;
    height: 300px; /* Fixed height for consistency */
    object-fit: contain;
    display: block;
    padding: 1rem;
}

.card-info {
    padding: 1.25rem;
}

.card-brand {
    font-size: 0.85rem;
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: var(--modal-overlay);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    animation: fadeIn 0.3s;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.3s;
}

.close-button {
    position: absolute;
    top: 15px;
    right: 20px;
    color: #fff; /* White against image usually, or handle background */
    background-color: rgba(0,0,0,0.5);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.2s;
}

.close-button:hover {
    background-color: rgba(0,0,0,0.7);
}

.modal-body {
    padding-bottom: 2rem;
}

#modal-image {
    width: 100%;
    height: 350px;
    object-fit: contain;
    padding: 1rem;
}

#modal-title {
    padding: 1rem 1.5rem 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.brand-tag {
    padding: 0 1.5rem;
    color: var(--secondary-text);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.modal-details {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-color);
}

.modal-details p {
    margin-bottom: 0.5rem;
}

.button {
    display: block;
    width: calc(100% - 3rem);
    margin: 0 auto;
    padding: 0.8rem;
    background-color: var(--accent-color);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.button:hover {
    background-color: #005bb5;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Responsive Tweaks */
@media (min-width: 768px) {
    h1.site-title {
        font-size: 3rem;
    }
    
    .modal-content {
        margin: 10% auto;
    }
}