/* Simple Image Tool - Global Styles */

:root {
    --bg-color: #f4f7f9;
    --text-color: #1a1a1a;
    --card-bg-color: #ffffff;
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --secondary-color: #6c757d;
    --button-text-color: #ffffff;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --active-button-bg: #e9ecef;
    --active-button-color: #1a1a1a;
    --modal-overlay-color: rgba(0, 0, 0, 0.4);

    /* Translucent Gradients */
    --gradient-primary: linear-gradient(135deg, rgba(0, 123, 255, 0.85), rgba(0, 86, 179, 0.85));
    --gradient-primary-hover: linear-gradient(135deg, rgba(0, 123, 255, 0.95), rgba(0, 86, 179, 0.95));
}

html.dark-mode {
    --bg-color: #1a1c1e;
    --text-color: #e3e3e3;
    --card-bg-color: #25282c;
    --primary-color: #3b82f6;
    --primary-hover-color: #2563eb;
    --secondary-color: #a0a0a0;
    --border-color: #374151;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --active-button-bg: #374151;
    --active-button-color: #ffffff;
    --modal-overlay-color: rgba(0, 0, 0, 0.6);

    --gradient-primary: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(37, 99, 235, 0.8));
    --gradient-primary-hover: linear-gradient(135deg, rgba(59, 130, 246, 0.9), rgba(37, 99, 235, 0.9));
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0 1em 2em 1em;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
}

header {
    width: 100%;
    max-width: 1000px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1.5em 0;
    gap: 0.8em;
}

.header-btn {
    background-color: var(--card-bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5em 1em;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: 500;
    transition: all 0.2s;
    width: auto;
}
.header-btn:hover {
    background-color: var(--active-button-bg);
    border-color: var(--primary-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0; top: 0;
    width: 100%; height: 100%;
    align-items: center;
    justify-content: center;
}
.modal.open { display: flex; }
.modal-overlay {
    position: absolute; width: 100%; height: 100%;
    background-color: var(--modal-overlay-color);
    backdrop-filter: blur(2px);
}
.modal-content {
    position: relative;
    background-color: var(--card-bg-color);
    padding: 2.5em;
    border-radius: 16px;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}
.modal-content h2 { margin: 0 0 1.2em 0; font-size: 1.4em; }
.modal-options { display: flex; flex-direction: column; gap: 0.6em; }
.modal-options button {
    width: 100%;
    padding: 1em;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    border-radius: 10px;
    text-align: left;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.2s;
}
.modal-options button.active {
    background: var(--gradient-primary);
    color: var(--button-text-color);
    border-color: transparent;
}

.close-modal-btn {
    position: absolute; top: 1em; right: 1em;
    background: none; border: none; font-size: 1.8em;
    cursor: pointer; color: var(--secondary-color);
    line-height: 1; padding: 4px;
}

/* Button & UI Components */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 700;
}
.btn-primary:hover { transform: scale(1.02); background: var(--gradient-primary-hover); }

.btn-toggle-group { 
    display: flex; 
    background: var(--bg-color); 
    padding: 4px; 
    border-radius: 10px; 
    border: 1px solid var(--border-color); 
}
.btn-toggle {
    padding: 0.5em 1em;
    border: none;
    background: none;
    color: var(--text-color);
    cursor: pointer;
    border-radius: 7px;
    font-size: 0.9em;
    font-weight: 500;
    transition: all 0.2s;
}
.btn-toggle.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* Tool Container */
#main-container {
    width: 100%;
    max-width: 1000px;
    background-color: var(--card-bg-color);
    padding: 2.5em;
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow-color);
}

/* Language-specific tweaks */
:lang(ja) .header-btn { font-size: 0.8em; }

/* --- Description Section (AdSense Content) --- */
.description-section {
    max-width: 1000px;
    width: 100%;
    margin: 3em auto 1em;
    padding: 2em;
    background: var(--card-bg-color);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-color);
    text-align: left;
}

.description-section h2 {
    font-size: 1.4em;
    margin-bottom: 0.8em;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.3em;
}

.description-section h3 {
    font-size: 1.1em;
    margin: 1.5em 0 0.5em;
    color: var(--primary-color);
    font-weight: 700;
}

.description-section p {
    line-height: 1.7;
    margin-bottom: 1em;
    color: var(--secondary-color);
}

.description-section ul {
    list-style: none;
    padding: 0;
}

.description-section ul li {
    padding-left: 1.5em;
    position: relative;
    margin-bottom: 0.5em;
    line-height: 1.6;
    color: var(--secondary-color);
}

.description-section ul li::before {
    content: "✔";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
    font-size: 0.9em;
}

/* --- Footer --- */
footer {
    width: 100%;
    max-width: 1000px;
    margin-top: 3em;
    padding: 2em 0;
    text-align: center;
    font-size: 0.85em;
    color: var(--secondary-color);
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--secondary-color);
    text-decoration: none;
    margin: 0 1em;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--primary-color);
}

footer .copyright {
    display: block;
    margin-top: 1em;
    opacity: 0.7;
}

/* --- Cookie Consent Banner --- */
#cookie-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 600px;
    background: var(--card-bg-color);
    padding: 1.2em 2em;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: space-between;
    gap: 1.5em;
    z-index: 9999;
    border: 1px solid var(--border-color);
}

#cookie-banner p {
    font-size: 0.9em;
    margin: 0;
    color: var(--secondary-color);
}

#cookie-btn {
    flex-shrink: 0;
    padding: 0.6em 1.5em;
    border-radius: 8px;
    font-size: 0.85em;
}

@media (max-width: 600px) {
    #cookie-banner {
        flex-direction: column;
        text-align: center;
        padding: 1.5em;
    }
}

@media (max-width: 850px) {
    .description-section { margin: 2em 0; padding: 1.5em; }
    footer { padding: 1.5em 0; }
}