:root {
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --background-dark: #1a1a2e;
    --text-light: #f0f0f0;
    --card-bg-dark: #2a2a45;
    --border-color-dark: #404066;
    --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.4);
    --font-family: 'Poppins', sans-serif;
}

body {
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    background-color: var(--background-dark);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.8rem;
}

/* Main Container */
.container {
    background-color: var(--card-bg-dark);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-dark);
    text-align: center;
    max-width: 550px;
    width: 90%;
    margin: 2rem auto;
}

.intro-text h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0;
}

.intro-text p {
    color: var(--text-light);
    opacity: 0.8;
    margin-bottom: 2rem;
}

/* Form */
.form-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

#image-upload-area {
    border: 2px dashed var(--border-color-dark);
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: border-color 0.3s, background-color 0.3s;
}

#image-upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(74, 144, 226, 0.05);
}

.custom-file-upload {
    display: block;
}

#upload-placeholder {
    padding: 2rem 0;
}

#upload-placeholder i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

#upload-placeholder p {
    margin: 0;
    color: var(--text-light);
    opacity: 0.7;
}

#upload-placeholder span {
    font-weight: 600;
    color: var(--primary-color);
}

#image-preview-container {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}

#image-preview {
    max-width: 100%;
    max-height: 300px;
    display: block;
}

#aspect-ratio-selector {
    margin-top: 1rem;
    animation: fadeIn 0.5s;
}

#aspect-ratio-selector label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-align: left;
}

.aspect-ratio-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.aspect-ratio-btn {
    flex: 1;
    padding: 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--border-color-dark);
    background-color: var(--card-bg-dark);
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s, border-color 0.3s;
}

.aspect-ratio-btn:hover {
    background-color: rgba(74, 144, 226, 0.1);
    border-color: var(--primary-color);
}

.aspect-ratio-btn.selected {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    font-weight: 600;
}

.style-selector label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-align: left;
}

.select-wrapper {
    position: relative;
}

#style-select {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color-dark);
    background-color: var(--card-bg-dark);
    color: var(--text-light);
    font-family: var(--font-family);
    font-size: 1rem;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.select-wrapper::after {
    content: '\f078';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    right: 1rem;
    transform: translateY(-50%);
    color: var(--primary-color);
    pointer-events: none;
}

#generate-btn, .btn-download {
    padding: 1rem;
    border-radius: 8px;
    border: none;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-family);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
}

#generate-btn:hover, .btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#generate-btn:disabled {
    background: #a0b3d1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Status & Result */
#status-container {
    margin-top: 1.5rem;
    min-height: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#status-message {
    font-weight: 500;
    font-size: 0.9rem;
}

#loader {
    border: 4px solid rgba(0,0,0,0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#result-container {
    margin-top: 2rem;
    animation: fadeIn 0.5s;
}

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

#result-container h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.result-image-wrapper {
    border: 2px solid var(--border-color-dark);
    border-radius: 12px;
    padding: 0.5rem;
    margin-bottom: 1.5rem;
    background-color: var(--background-dark);
}

#result-image {
    max-width: 100%;
    border-radius: 8px;
}

/* Footer */
footer {
    margin-top: 2rem;
    padding: 1rem 0;
    font-size: 0.9rem;
    color: var(--text-light);
    opacity: 0.7;
}

.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        width: 100%;
        margin: 0;
        border-radius: 0;
        min-height: 100vh;
        box-shadow: none;
    }

    .intro-text h2 {
        font-size: 1.8rem;
    }

    #upload-placeholder {
        padding: 1rem 0;
    }
}