*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:        #f5f5f7;
    --bg-card:   #ffffff;
    --bg-hover:  #f9fafb;
    --border:    #e5e7eb;
    --accent:    #6c63ff;
    --accent-h:  #5b52ee;
    --text:      #111827;
    --text-2:    #6b7280;
    --text-3:    #9ca3af;
    --text-muted:#9ca3af;
    --success:   #16a34a;
    --danger:    #dc2626;
    --warning:   #d97706;
    --r:         6px;
}

html, body { min-height: 100%; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 15px;
    line-height: 1.5;
}

.container { max-width: 860px; margin: 0 auto; padding: 40px 24px 0; }

/* ── Header ── */
.header {
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 860px;
    margin: 0 auto;
    padding: 14px 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 9px;
    text-decoration: none;
    color: var(--text);
}

.logo-icon {
    width: 28px; height: 28px;
    background: var(--accent);
    border-radius: var(--r);
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; color: #fff;
}

.logo-text { font-size: 15px; font-weight: 700; color: var(--text); }
.logo-text span { color: var(--accent); }

.header-meta { font-size: 12px; color: var(--text-3); }

.header-nav { display: flex; align-items: center; gap: 8px; }

/* ── Upload Zone ── */
.upload-zone {
    border: 2px dashed #d1d5db;
    border-radius: var(--r);
    padding: 72px 40px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    user-select: none;
    background: var(--bg-card);
}

.upload-zone:hover  { border-color: var(--accent); background: #faf9ff; }
.upload-zone.dragover { border-color: var(--accent); background: #f3f1ff; }
.upload-zone input[type="file"] { display: none; }

.upload-zone .upload-icon {
    font-size: 36px;
    color: var(--text-3);
    margin-bottom: 18px;
}

.upload-zone h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.upload-zone p {
    font-size: 13px;
    color: var(--text-2);
    margin-bottom: 24px;
}

.upload-formats {
    font-size: 11px;
    color: var(--text-3);
    margin-top: 16px;
    letter-spacing: 0.3px;
}

/* ── Files View ── */
.files-view { display: none; }

.files-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.files-count { font-size: 13px; color: var(--text-2); }

.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 28px;
}

.file-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
}

.file-card-thumb {
    position: relative;
    height: 110px;
    background: #f3f4f6;
}

.file-card-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}

.file-card-remove {
    position: absolute;
    top: 5px; right: 5px;
    width: 22px; height: 22px;
    background: rgba(0,0,0,0.55);
    border: none;
    border-radius: 4px;
    color: #fff;
    cursor: pointer;
    font-size: 11px;
    display: flex; align-items: center; justify-content: center;
    opacity: 0;
    transition: opacity 0.15s;
    font-family: inherit;
}

.file-card:hover .file-card-remove { opacity: 1; }

.file-card-info { padding: 8px 10px; }

.file-card-name {
    font-size: 11px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
    margin-bottom: 2px;
}

.file-card-size { font-size: 10px; color: var(--text-3); display: block; }

.files-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding-top: 4px;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 10px 20px;
    border-radius: var(--r);
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    transition: background 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.btn-primary  { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-h); box-shadow: 0 4px 16px rgba(108,99,255,.25); }

.btn-secondary { background: var(--bg-card); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-hover); }

.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-outline:hover { background: #f3f1ff; }

.btn-success  { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }

.btn-lg { padding: 13px 36px; font-size: 15px; }
.btn-sm { padding: 7px 14px; font-size: 13px; }

.btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── Progress Overlay ── */
#progress-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(255,255,255,.8);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center; justify-content: center;
}

#progress-overlay.visible { display: flex; }

.progress-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 36px 48px;
    text-align: center;
    min-width: 260px;
    box-shadow: 0 8px 32px rgba(0,0,0,.10);
}

.spinner {
    width: 34px; height: 34px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    margin: 0 auto 16px;
}

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

.progress-box h3 { font-size: 15px; font-weight: 600; margin-bottom: 5px; }
.progress-box p  { font-size: 13px; color: var(--text-2); }

/* ── Email Modal ── */
#email-modal {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.3);
    backdrop-filter: blur(6px);
    z-index: 300;
    align-items: center; justify-content: center;
}

#email-modal.visible { display: flex; }

.modal-box {
    background: #fff;
    border-radius: 8px;
    padding: 32px 28px;
    box-shadow: 0 20px 60px rgba(0,0,0,.18);
    width: 100%; max-width: 360px;
    animation: modal-in .2s ease;
}

@keyframes modal-in {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.modal-icon {
    width: 38px; height: 38px;
    background: #f0effe;
    border-radius: var(--r);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 14px;
    color: #6c63ff; font-size: 15px;
}

.modal-box h2 {
    font-size: 18px; font-weight: 700;
    text-align: center; margin-bottom: 6px;
    color: #111827;
}

.modal-box > p {
    text-align: center; color: #6b7280;
    font-size: 13px; margin-bottom: 20px; line-height: 1.6;
}

.form-group { margin-bottom: 12px; }

.form-group label {
    display: block; font-size: 11px; font-weight: 700;
    color: #374151; margin-bottom: 6px;
    text-transform: uppercase; letter-spacing: .6px;
}

.form-group input {
    width: 100%;
    background: #f9fafb; border: 1.5px solid #e5e7eb;
    border-radius: var(--r); padding: 10px 12px;
    font-size: 14px; color: #111827; outline: none;
    transition: border-color .15s, box-shadow .15s;
    font-family: inherit;
}

.form-group input:focus {
    border-color: #6c63ff;
    box-shadow: 0 0 0 3px rgba(108,99,255,.1);
    background: #fff;
}

.form-group input::placeholder { color: #9ca3af; }

.modal-error {
    color: #ef4444; font-size: 12px;
    text-align: center; margin-top: 10px; min-height: 16px;
}

/* ── Convert page ── */
.page-title { margin-bottom: 24px; }
.page-title h1 { font-size: 24px; font-weight: 700; letter-spacing: -.4px; margin-bottom: 4px; }
.page-title p  { font-size: 13px; color: var(--text-2); }

.stats-bar {
    display: flex; gap: 20px;
    margin-bottom: 20px; padding: 11px 16px;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r);
}

.stat { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-2); }
.stat strong { color: var(--text); }

.actions-bar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px; gap: 12px; flex-wrap: wrap;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px; margin-bottom: 40px;
}

.image-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--r); overflow: hidden;
    transition: border-color .15s, transform .15s;
}

.image-card:hover      { border-color: var(--accent); transform: translateY(-2px); }
.image-card.converting { border-color: var(--warning); }
.image-card.done       { border-color: var(--success); }
.image-card.error      { border-color: var(--danger); }

.card-thumb { width: 100%; height: 130px; object-fit: cover; display: block; background: #f3f4f6; }
.card-body  { padding: 9px 11px; }

.card-name {
    font-size: 12px; font-weight: 500;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 2px;
}

.card-size { font-size: 11px; color: var(--text-3); }

.card-status {
    display: flex; align-items: center; gap: 6px;
    font-size: 11px; font-weight: 500;
    margin-top: 7px; padding-top: 7px; border-top: 1px solid var(--border);
}

.status-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--text-3); flex-shrink: 0;
}

.image-card.converting .status-dot { background: var(--warning); animation: pulse 1s infinite; }
.image-card.done        .status-dot { background: var(--success); }
.image-card.error       .status-dot { background: var(--danger); }

@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }

.card-download {
    display: inline-flex; align-items: center; gap: 4px;
    margin-top: 6px; font-size: 12px; color: var(--accent);
    text-decoration: none; font-weight: 500;
}

.card-download:hover { text-decoration: underline; }

.progress-bar-wrap { display: none; margin-bottom: 16px; }
.progress-bar-wrap.visible { display: block; }

.progress-bar-label {
    display: flex; justify-content: space-between;
    font-size: 12px; color: var(--text-2); margin-bottom: 5px;
}

.progress-bar-track { background: var(--bg-hover); border-radius: 2px; height: 3px; overflow: hidden; }
.progress-bar-fill  { height: 100%; background: var(--accent); border-radius: 2px; width: 0%; transition: width .3s ease; }

.done-banner {
    display: none;
    background: rgba(22,163,74,.08); border: 1px solid rgba(22,163,74,.2);
    border-radius: var(--r); padding: 11px 16px; margin-bottom: 16px;
    align-items: center; gap: 10px; font-size: 13px; color: var(--success); font-weight: 500;
}

.done-banner.visible { display: flex; }

.breadcrumb {
    display: flex; align-items: center; gap: 8px;
    font-size: 13px; color: var(--text-3); margin-bottom: 22px;
}

.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.empty-state { text-align: center; padding: 64px 24px; color: var(--text-2); }
.empty-state .empty-icon { font-size: 30px; margin-bottom: 14px; color: var(--text-3); }
.empty-state h2 { font-size: 16px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.empty-state p  { font-size: 13px; margin-bottom: 20px; }

/* ── Footer ── */
.footer {
    text-align: center; padding: 24px 0 20px;
    color: var(--text-3); font-size: 12px;
    border-top: 1px solid var(--border); margin-top: 48px;
}

.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ── Auth Pages ── */
.auth-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 57px);
    padding: 40px 24px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 36px 32px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 4px 24px rgba(0,0,0,.06);
}

.auth-card h1 {
    font-size: 22px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 5px;
    color: var(--text);
}

.auth-subtitle {
    text-align: center;
    font-size: 13px;
    color: var(--text-2);
    margin-bottom: 26px;
    line-height: 1.5;
}

.auth-card .form-group { margin-bottom: 14px; }

.input-wrap { position: relative; }

.input-wrap input { padding-right: 42px; }

.input-toggle {
    position: absolute;
    right: 11px; top: 50%;
    transform: translateY(-50%);
    background: none; border: none;
    cursor: pointer; color: var(--text-3);
    font-size: 13px; padding: 4px;
    font-family: inherit;
    line-height: 1;
}
.input-toggle:hover { color: var(--text-2); }

.auth-submit {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 14px;
    margin-top: 6px;
}

.auth-footer-link {
    text-align: center;
    font-size: 13px;
    color: var(--text-3);
    margin-top: 20px;
}

.auth-footer-link a { color: var(--accent); text-decoration: none; font-weight: 500; }
.auth-footer-link a:hover { text-decoration: underline; }

.alert {
    border-radius: var(--r);
    font-size: 13px;
    padding: 10px 12px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-error   { background: #fef2f2; border: 1px solid #fecaca; color: var(--danger); }
.alert-success { background: #f0fdf4; border: 1px solid #bbf7d0; color: var(--success); }

.user-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 6px 10px;
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.expiry-note {
    font-size: 12px;
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 4px;
}

.expiry-note.warn { color: var(--warning); }
.expiry-note.ok   { color: var(--success); }

/* ── Converter Title ── */
.converter-title {
    text-align: center;
    margin-bottom: 28px;
    padding: 4px 0;
}

.format-badge {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    background: #f0effe;
    border: 1px solid #ddd9ff;
    border-radius: 20px;
    padding: 5px 16px;
    margin-bottom: 18px;
    font-size: 12px;
    font-weight: 600;
}

.fmt-tag { color: var(--text-2); letter-spacing: .5px; }
.fmt-tag--dest { color: var(--accent); }
.fmt-arrow { color: var(--text-3); font-size: 10px; }

.converter-title h1 {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -.6px;
    color: var(--text);
    margin-bottom: 10px;
    line-height: 1.2;
}

.converter-title > p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
}

/* ── Format Section ── */
.format-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 36px;
}

.format-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 20px 22px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.format-card-icon {
    width: 38px; height: 38px;
    background: #f0effe;
    border-radius: var(--r);
    display: flex; align-items: center; justify-content: center;
    color: var(--accent);
    font-size: 15px;
    flex-shrink: 0;
    margin-top: 2px;
}

.format-card-icon--dest {
    background: #fffbeb;
    color: #d97706;
}

.format-card-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
    color: var(--text);
}

.format-card-sub {
    font-size: 10px;
    color: var(--text-3);
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .6px;
}

.format-card-desc {
    font-size: 12.5px;
    color: var(--text-2);
    line-height: 1.65;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .upload-zone { padding: 48px 24px; }
    .files-grid  { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
    .image-grid  { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
    .modal-box   { margin: 16px; }
    .stats-bar      { flex-wrap: wrap; gap: 10px; }
    .header-nav     { gap: 6px; }
    .btn-sm         { padding: 6px 10px; font-size: 12px; }
    .format-section { grid-template-columns: 1fr; }
    .converter-title h1 { font-size: 24px; }
}