/* Modern Black and White Theme */
:root {
    --bg-color: #0a0a0a;
    --text-color: #ffffff;
    --border-color: #333333;
    --hover-bg: #ffffff;
    --hover-text: #000000;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
}

h1 {
    font-weight: 300;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 2.5rem;
    font-size: 2.5rem;
}

/* Form Layout */
form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.search-bar {
    display: flex;
    justify-content: center;
    width: 100%;
    gap: 15px;
}

input[type="text"] {
    padding: 15px 20px;
    width: 100%;
    max-width: 500px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    border-color: var(--text-color);
}

input[type="text"]::placeholder {
    color: #666;
}

button {
    padding: 15px 30px;
    background: var(--text-color);
    color: var(--hover-text);
    border: 1px solid var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

button:hover {
    background: transparent;
    color: var(--text-color);
}

/* Method Selector (Segmented Control) */
.method-selector {
    display: flex;
    border: 1px solid var(--border-color);
    padding: 4px;
    background-color: #000000;
}

.method-option {
    position: relative;
    cursor: pointer;
}

.method-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.method-option span {
    display: inline-block;
    padding: 10px 22px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #888888;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Active State */
.method-option input[type="radio"]:checked + span {
    background-color: var(--text-color);
    color: var(--hover-text);
}

/* Hover state for inactive options */
.method-option:hover span {
    color: var(--text-color);
}

.results-count {
    text-align: center;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #666;
    margin-bottom: 2rem;
}

/* Image Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.image-card {
    position: relative;
    cursor: pointer;
    overflow: hidden;
    border: 1px solid var(--border-color);
    aspect-ratio: 1 / 1;
    background-color: #111;
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s ease;
    filter: grayscale(20%);
}

.image-card:hover img {
    transform: scale(1.08);
    filter: grayscale(0%);
}

.overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-card:hover .overlay {
    opacity: 1;
}

.overlay span {
    border: 1px solid var(--text-color);
    padding: 12px 24px;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 2px;
    background: rgba(0, 0, 0, 0.5);
}

.no-results {
    text-align: center;
    color: #666;
    font-size: 1.2rem;
}

/* Toast Notification */
#toast {
    visibility: hidden;
    min-width: 250px;
    background-color: var(--text-color);
    color: var(--hover-text);
    text-align: center;
    padding: 16px;
    position: fixed;
    z-index: 100;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    font-size: 14px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    box-shadow: 0px 4px 15px rgba(255, 255, 255, 0.1);
}

#toast.show {
    visibility: visible;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

@keyframes fadein {
    from {bottom: 0; opacity: 0;} 
    to {bottom: 30px; opacity: 1;}
}
@keyframes fadeout {
    from {bottom: 30px; opacity: 1;} 
    to {bottom: 0; opacity: 0;}
}