/* general*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", Roboto, sans-serif;
    background: #fdfdfd;
    color: #1c1c1e;
    line-height: 1.6;
}

/* navbar */
header {
    top: 0;
    position: sticky;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 1px 300px #aaaaaa;
}

nav {
    display: flex;
    justify-content: center;
    gap: 16px;
    align-items: center;
    padding: 0.8rem 2rem;
}

nav a {
    color: #1c1c1e;
    text-decoration: none;
    margin: 0 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #ff9500;
}

.sign-in a {
    background: #ff9500;
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 12px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(255, 149, 0, 0.3);
}

/* section*/
section {
    padding: 3rem 2rem;
    text-align: center;
}

/* upload*/
#upload {
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

input[type="file"], input[type="submit"], input[type="reset"] {
    margin-top: 1rem;
}

input[type="submit"], input[type="reset"] {
    background: #ff9500;
    color: white;
    border: none;
    padding: 0.5rem 1.2rem;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 500;
    margin: 0.5rem;
    transition: 0.3s ease;
}

input[type="submit"]:hover, input[type="reset"]:hover {
    background: #e07e00;
}

/* photo*/
#gallery h2 {
    color: #ff9500;
    margin-bottom: 1rem;
}

.image-grid {
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.image-grid figure {
    background: rgba(255, 255, 255, 0.65);
    border-radius: 15px;
    padding: 0.8rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.image-grid img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 12px;
}

.image-grid figure:hover {
    transform: scale(1.03);
}

.image-grid figcaption {
    margin-top: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: #1c1c1e;
}

/* contact */
#contact {
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    max-width: 900px;
    margin: 2rem auto;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

#contact-info {
    text-align: center;
    margin-bottom: 2rem;
}

#contact-info i {
    color: #ff9500;
    margin-right: 0.5rem;
}

.social-link a {
    margin: 0 0.5rem;
    font-size: 1.5rem;
    color: #ff9500;
    transition: color 0.3s ease;
}

#contact-form input, #contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    margin-top: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.8);
    outline: none;
}

#contact-form button {
    background: #ff9500;
    color: white;
    padding: 0.6rem 1.5rem;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 500;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(255, 149, 0, 0.3);
}

#contact-form button:hover {
    background: #e07e00;
}

/* footer */
footer {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    padding: 1.5rem 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
}

#footer-link a {
    color: #1c1c1e;
    margin: 0 1rem;
    text-decoration: none;
    font-weight: 500;
}

#footer-link a:hover {
    color: #ff9500;
}

.footer-copyright {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: #6e6e73;
}

/* detail for each photo*/
.photo-detail {
    max-width: 900px;
    margin: 2rem auto;
    text-align: center;
}

.large-photo {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    margin-bottom: 1rem;
}

.back-btn {
    display: inline-block;
    margin-top: 1rem;
    background: #ff9500;
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(255, 149, 0, 0.3);
}

.back-btn:hover {
    background: #e07e00;
}