/* THEME VARIABLES */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #10b981;
    --bg-color: #fff;
    --card-bg: #fff;
    --card-border: #e5e7eb;
    --text-primary: #181818;
    --text-secondary: #64748b;
    --input-bg: #fff;
    --surface-secondary: #f3f4f6;
    --active-tab: #e0e7ff;
    --footer-link: #6366f1;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container, .wide-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.panel {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem 1.5rem 1.5rem 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 16px rgba(80,80,80,0.06);
    box-sizing: border-box;
}
.panel form {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}
form {
    border: 1.5px solid var(--card-border);
    border-radius: 10px;
    background: var(--card-bg);
    padding: 1.5rem 1.2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 12px rgba(80,80,80,0.04);
    transition: background 0.3s, border-color 0.3s;
}
.form-group {
    margin-bottom: 0.7rem;
}
.form-label {
    font-weight: 600;
    margin-bottom: 0.4rem;
    display: block;
    color: var(--text-primary);
    font-size: 0.98rem;
}
.form-input, textarea.form-input, select.form-input {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1.5px solid var(--card-border);
    border-radius: 8px;
    font-size: 1rem;
    padding: 0.7rem 1rem;
    transition: border 0.2s, box-shadow 0.2s;
    margin-bottom: 0.1rem;
}
.form-input:focus, textarea.form-input:focus, select.form-input:focus {
    border: 1.5px solid var(--primary-color);
    outline: none;
    background: var(--card-bg);
    box-shadow: 0 0 0 2px #6366f11a;
}
.separator-group, .quotes-group {
    display: flex;
    flex-direction: column;
    flex: 1 1 0;
    min-width: 0;
}
.separator-group .form-input,
.quotes-group .form-input {
    color: var(--text-primary);
    border: 1.5px solid var(--card-border);
}
.separator-group .form-input:focus,
.quotes-group .form-input:focus {
    background: var(--input-bg);
    border: 1.5px solid var(--primary-color);
}
.btn-group {
    display: flex;
    gap: 0.7rem;
    margin-bottom: 0.7rem;
}
.btn {
    flex: 1 1 0;
    padding: 0.7rem 0;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover)) !important;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(100,100,100,0.08);
}
.btn:hover, .btn:focus {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color)) !important;
}
.form-inline {
    display: flex;
    flex-wrap: nowrap;
    align-items: flex-end;
    gap: 0.7rem;
    margin-bottom: 1.2rem;
}

/* Responsive */
@media (max-width: 600px) {
    .hero h1 {
        font-size: 1.2rem;
    }
    .panel {
        padding: 0.7rem 0.2rem;
    }
    .form-input, textarea.form-input, select.form-input {
        font-size: 0.97rem;
        padding: 0.5rem 0.7rem;
    }
    .btn {
        font-size: 0.97rem;
        padding: 0.6rem 0;
    }
    .form-inline {
        flex-direction: column;
        align-items: stretch;
        gap: 0.7rem;
    }
}
@media (max-width: 900px) {
    .form-inline {
        flex-direction: column;
        flex-wrap: wrap;
        align-items: stretch;
        gap: 0.7rem;
    }
}



/* Hidden Class */
.hidden {
    display: none !important;
}

/* Footer */
footer {
    color: #181818 !important;
    background: transparent;
    text-align: center;
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3em;
    margin-top: 0.5em;
}
footer a {
    color: var(--footer-link) !important;
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.2s;
}
footer .copyright {
    color: #222 !important;
    font-size: 0.98em;
    font-weight: 500;
    letter-spacing: 0.01em;
    margin-top: 0.5em;
    margin-bottom: 0;
    display: block;
}
.dark-mode footer {
    color: #e5e7eb !important;
    background: transparent;
}
.dark-mode footer a {
    color: #a5b4fc !important;
}
.dark-mode footer .copyright {
    color: #e5e7eb !important;
}

/* DARK MODE SUPPORT */
.dark-mode {
    --bg-color: #181c1f;
    --card-bg: #23272b;
    --card-border: #2d3237;
    --text-primary: #e5e7eb;
    --text-secondary: #94a3b8;
    --input-bg: #181c1f;
    --surface-secondary: #23272b;
    --active-tab: #23272b;
    --footer-link: #a5b4fc;
}
.dark-mode body {
    background: var(--bg-color);
    color: var(--text-primary);
}
.dark-mode .container, .dark-mode .wide-container {
    background: none;
}
.dark-mode form {
    background: var(--card-bg);
    border-color: var(--card-border);
}
.dark-mode .form-input, .dark-mode textarea.form-input, .dark-mode select.form-input {
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1.5px solid var(--card-border);
}
.dark-mode .separator-group .form-input,
.dark-mode .quotes-group .form-input {
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1.5px solid var(--card-border);
}
.dark-mode .separator-group .form-input:focus,
.dark-mode .quotes-group .form-input:focus {
    background: var(--input-bg);
    border: 1.5px solid var(--primary-color);
}
.dark-mode .btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover)) !important;
    color: #fff;
}
.dark-mode .btn:hover, .dark-mode .btn:focus {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color)) !important;
}
.dark-mode .tabs, .dark-mode .file-drop-zone, .dark-mode .copy-btn, .dark-mode .download-btn {
    background: var(--surface-secondary);
    border: 1.5px solid var(--card-border);
}
.dark-mode .tabs .tab-btn.active {
    background: var(--active-tab) !important;
    color: var(--text-primary) !important;
    border-color: var(--primary-color) !important;
}
.dark-mode .file-drop-zone.dragover {
    background: rgba(99, 102, 241, 0.15) !important;
}

.dark-mode header h1,
.dark-mode header p,
.dark-mode .tab-btn,
.dark-mode .tab-btn.active,
.dark-mode .output-actions button,
.dark-mode .action-btn,
.dark-mode .copy-btn,
.dark-mode .download-btn,
.dark-mode .file-info .filename,
.dark-mode .file-info .filesize,
.dark-mode .file-info .filetype,
.dark-mode .status,
.dark-mode footer,
.dark-mode footer a {
    color: #fff !important;
}
.dark-mode .tab-btn.active {
    background: #333 !important;
    border-color: #6366f1 !important;
}
.dark-mode .tab-btn {
    background: #222 !important;
    border-color: #333 !important;
}
.dark-mode .action-btn {
    background: linear-gradient(135deg, #6366f1, #4f46e5) !important;
}
.dark-mode .file-drop-zone {
    background: #222 !important;
    border-color: #333 !important;
}
.dark-mode .file-drop-zone .drop-content p,
.dark-mode .file-drop-zone .drop-content small {
    color: #e5e7eb !important;
}
.dark-mode .file-drop-zone .icon {
    color: #a5b4fc !important;
}
.dark-mode .file-drop-zone.dragover {
    background: rgba(99, 102, 241, 0.2) !important;
}
.dark-mode textarea,
.dark-mode input[type="text"],
.dark-mode input[type="file"] {
    background: var(--input-bg);
    color: var(--text-primary);
    border-color: 1.5px solid var(--card-border);
}
footer a {
    color: var(--footer-link) !important;
}
.dark-mode footer a {
    color: var(--footer-link) !important;
}

.visually-hidden {
    position: absolute !important;
    height: 1px; width: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}
.topbar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1.2rem;
    margin-top: 1.2rem;
    padding: 0 20px;
}
.theme-toggle {
    display: flex;
    align-items: center;
}
.theme-toggle-btn {
    background: none;
    border: none;
    padding: 0.2em 0.2em;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    outline: none;
    min-width: 36px;
    min-height: 36px;
}
.theme-toggle-btn:focus {
    box-shadow: 0 0 0 2px var(--primary-color);
    outline: none;
}
#theme-icon svg {
    display: block;
    width: 28px;
    height: 28px;
}
.github-link {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}
.github-link:hover .github-icon {
    color: var(--primary-color);
}
.github-icon {
    width: 28px;
    height: 28px;
    display: block;
    color: var(--text-primary);
    transition: color 0.2s;
}
.github-link, .github-icon, #theme-icon svg {
    color: #181818 !important;
    fill: #181818 !important;
    transition: color 0.2s, fill 0.2s;
}
.dark-mode .github-link, .dark-mode .github-icon, .dark-mode #theme-icon svg {
    color: #f1f5f9 !important;
    fill: #f1f5f9 !important;
}

.client-side-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 10px;
    padding: 8px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    display: inline-block;
}

.dark-mode .client-side-note {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
}