/* =============================================
   IJCRT APC Payment — Corporate Journal Style
   Inspired by Elsevier / Scopus / AIAA
   ============================================= */

/* ── RESET & BASE ───────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    /* Core palette — deep navy + orange accent (Elsevier-inspired) */
    --navy:           #111111;
    --navy-mid:       #222222;
    --navy-light:     #444444;
    --accent:         #111111;
    --accent-hover:   #333333;
    --accent-light:   #f0f0f0;

    /* Surfaces */
    --bg:             #f2f4f7;
    --surface:        #ffffff;
    --surface-2:      #f7f9fc;
    --border:         #d0d7e3;
    --border-light:   #e5eaf2;

    /* Text */
    --text:           #1a1f2e;
    --text-muted:     #5a6478;
    --text-faint:     #9aa3b5;

    /* Status */
    --success:        #1a6e36;
    --success-bg:     #eaf5ee;
    --error:          #b91c1c;
    --error-bg:       #fef2f2;

    /* Misc */
    --input-bg:       #f9fafc;
    --radius-sm:      4px;
    --radius:         6px;
    --radius-lg:      8px;
    --shadow-card:    0 1px 4px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.05);
    --shadow-sm:      0 1px 3px rgba(0,0,0,0.07);
    --transition:     150ms ease;

    /* Gold rule accent (like journal rule lines) */
    --rule:            #111111;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Source Serif 4', 'Georgia', serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ── TOP UTILITY BAR ────────────────────────── */
.utility-bar {
    background: var(--navy);
    padding: 0 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.utility-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 36px;
    gap: 1rem;
}
.utility-bar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}
.utility-link {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.72rem;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition);
}
.utility-link:hover { color: rgba(255,255,255,0.95); }
.utility-divider-v {
    width: 1px;
    height: 14px;
    background: rgba(255,255,255,0.18);
}
.utility-bar-right {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.72rem;
    color: rgba(255,255,255,0.45);
    letter-spacing: 0.02em;
}

/* ── SITE HEADER ────────────────────────────── */
.site-header {
    background: var(--surface);
    border-bottom: 3px solid var(--navy);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1rem;
}
.journal-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}
.brand-icon {
    flex-shrink: 0;
}
.brand-text {
    display: flex;
    flex-direction: column;
    border-left: 3px solid var(--rule);
    padding-left: 14px;
}
.brand-short {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--navy);
    line-height: 1.15;
    letter-spacing: -0.01em;
}
.brand-full {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.67rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    max-width: 300px;
    line-height: 1.3;
    margin-top: 1px;
}
.header-meta-strip {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.header-meta-item {
    display: flex;
    flex-direction: column;
    padding: 6px 16px;
    border-right: 1px solid var(--border);
    background: var(--surface-2);
}
.header-meta-item:last-child { border-right: none; }
.header-meta-label {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-faint);
    font-weight: 600;
}
.header-meta-value {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--navy);
    line-height: 1.3;
}

/* ── PAGE TITLE BAR ─────────────────────────── */
.page-title-bar {
    background: var(--navy);
    padding: 0 2rem;
    border-bottom: 4px solid var(--accent);
}
.page-title-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.6rem 0;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}
.page-title-bar h1 {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.55rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 0.25rem;
}
.page-title-bar p {
    font-family: 'DM Sans', sans-serif;
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    max-width: 56ch;
}
.page-title-issn {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
    align-items: center;
}
.issn-chip {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    padding: 5px 12px;
    border-radius: 3px;
    border: 1px solid rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.8);
    background: rgba(255,255,255,0.07);
    text-transform: uppercase;
}

/* ── BREADCRUMB ─────────────────────────────── */
.breadcrumb-bar {
    background: var(--surface);
    border-bottom: 1px solid var(--border-light);
    padding: 0 2rem;
}
.breadcrumb-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 6px;
    height: 36px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    color: var(--text-faint);
}
.breadcrumb-inner a {
    color: var(--navy-light);
    text-decoration: none;
    transition: color var(--transition);
}
.breadcrumb-inner a:hover { color: var(--accent); text-decoration: underline; }
.breadcrumb-sep { color: var(--border); }
.breadcrumb-current { color: var(--text-muted); }

/* ── MAIN CONTENT ───────────────────────────── */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2rem 3.5rem;
}

/* ── FORM LAYOUT ────────────────────────────── */
.form-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 1.75rem;
    align-items: start;
}

/* ── SECTION HEADING (inside form) ─────────── */
.section-heading {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--navy);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-light);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-heading::before {
    content: '';
    width: 4px;
    height: 14px;
    background: var(--accent);
    border-radius: 2px;
    flex-shrink: 0;
}

/* ── FORM PANEL ─────────────────────────────── */
.form-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.panel-header {
    background: var(--navy);
    padding: 1.4rem 1.75rem;
    border-bottom: 3px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.panel-header-left h2 {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 3px;
}
.panel-header-left p {
    font-family: 'DM Sans', sans-serif;
    color: rgba(255,255,255,0.55);
    font-size: 0.8rem;
}
.panel-header-step {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-light);
    background: rgba(0,0,0,0.08);
    border: 1px solid rgb(255, 255, 255);
    padding: 4px 12px;
    border-radius: 3px;
    flex-shrink: 0;
}

form {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}
.form-row.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
label {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.01em;
}
.req { color: var(--error); margin-left: 2px; }

.input-wrap { position: relative; }
.input-icon {
    position: absolute;
    left: 11px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-faint);
    pointer-events: none;
    display: flex;
    align-items: center;
}
.input-wrap textarea ~ .input-icon,
.input-wrap textarea + .input-icon {
    top: 13px;
    transform: none;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
textarea {
    width: 100%;
    padding: 9px 12px 9px 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.875rem;
    color: var(--text);
    background: var(--input-bg);
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    outline: none;
    line-height: 1.5;
}
textarea {
    resize: vertical;
    min-height: 68px;
}
input:focus, textarea:focus {
    border-color: var(--navy-light);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}
input.no-icon, textarea.no-icon { padding-left: 12px; }

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
input[type="number"] { -moz-appearance: textfield; }

/* ── OPTIONAL TAG ────────────────────────────── */
.optional-tag {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.68rem;
    font-weight: 500;
    color: var(--text-faint);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 1px 7px;
    margin-left: 6px;
    letter-spacing: 0.04em;
    vertical-align: middle;
    text-transform: uppercase;
}

/* ── UTR HELP LINK ───────────────────────────── */
.utr-help-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.76rem;
    color: var(--navy-light);
    text-decoration: none;
    margin-top: 5px;
    font-weight: 500;
    transition: color var(--transition);
}
.utr-help-link:hover { color: var(--accent); text-decoration: underline; }

/* ── OPT-IN CHECKBOXES ───────────────────────── */
.section-label {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}
.optin-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--input-bg);
    transition: border-color var(--transition), background var(--transition);
    user-select: none;
}
.checkbox-item:hover {
    border-color: var(--navy-light);
    background: #f5f5f5;
}
.checkbox-item:has(input:checked) {
    border-color: var(--navy-light);
    background: #f5f5f5;
}
.checkbox-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.checkbox-box {
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--border);
    border-radius: 3px;
    background: var(--surface);
    flex-shrink: 0;
    position: relative;
    transition: background var(--transition), border-color var(--transition);
}
.checkbox-item input[type="checkbox"]:checked ~ .checkbox-box {
    background: var(--navy);
    border-color: var(--navy);
}
.checkbox-item input[type="checkbox"]:checked ~ .checkbox-box::after {
    display: block;
}
.checkbox-box::after {
    content: '';
    display: none;
    position: absolute;
    left: 3px;
    top: 0px;
    width: 6px;
    height: 10px;
    border: 2px solid #fff;
    border-top: none;
    border-left: none;
    transform: rotate(40deg);
}
.checkbox-label {
    display: flex;
    align-items: center;
    flex-direction: row;
    gap: 8px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    flex: 1;
}
.checkbox-label i { color: var(--navy-light); flex-shrink: 0; }
.checkbox-desc {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: auto;
}

/* ── FILE UPLOAD ────────────────────────────── */
.upload-zone {
    position: relative;
    border: 1.5px dashed var(--border);
    border-radius: var(--radius);
    background: var(--input-bg);
    transition: border-color var(--transition), background var(--transition);
    cursor: pointer;
    overflow: hidden;
}
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--navy-light);
    background: #f5f5f5;
}
.upload-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
    padding: 0;
    border: none;
    background: transparent;
}
.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 1.5rem;
    color: var(--text-muted);
    pointer-events: none;
}
.upload-text {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
}
.upload-text span {
    color: var(--navy-light);
    font-weight: 600;
    text-decoration: underline;
}
.upload-hint {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    color: var(--text-faint);
}
.upload-preview {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--success-bg);
    border-top: 1px solid #bbdfc9;
}
.upload-preview span {
    flex: 1;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.84rem;
    color: var(--success);
    font-weight: 500;
    word-break: break-all;
}
.remove-file {
    background: none;
    border: none;
    color: var(--error);
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 3px;
    transition: background var(--transition);
    display: flex;
    align-items: center;
}
.remove-file:hover { background: rgba(185,28,28,0.08); }

/* ── SUBMIT BUTTON ──────────────────────────── */
.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 28px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    margin-top: 0.5rem;
    letter-spacing: 0.01em;
}
.submit-btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 14px rgba(0,0,0,0.28);
    transform: translateY(-1px);
}
.submit-btn:active { transform: translateY(0); }
.submit-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-icon { display: flex; align-items: center; }

.form-disclaimer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    color: var(--text-faint);
    justify-content: center;
}

/* ── ALERTS ─────────────────────────────────── */
.error-alert {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--error-bg);
    border: 1px solid #fca5a5;
    border-left: 4px solid var(--error);
    border-radius: var(--radius);
    padding: 10px 14px;
    color: var(--error);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    margin: 1.25rem 1.75rem 0;
}

/* ── SUCCESS CARD ───────────────────────────── */
.success-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 3.5rem 2rem;
    text-align: center;
    max-width: 540px;
    margin: 0 auto;
    animation: fadeInUp 0.4s ease;
}
.success-icon { margin-bottom: 1.25rem; }
.success-card h2 {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.4rem;
    color: var(--navy);
    margin-bottom: 0.8rem;
}
.success-card p {
    font-family: 'DM Sans', sans-serif;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.75rem;
    max-width: 42ch;
    margin-inline: auto;
}
.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--navy);
    color: #fff;
    border-radius: var(--radius);
    text-decoration: none;
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 0.875rem;
    transition: background var(--transition);
}
.btn-back:hover { background: var(--navy-light); }

/* ── INFO PANEL ─────────────────────────────── */
.info-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* QR Card */
.qr-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.qr-header {
    background: var(--navy);
    padding: 1rem 1.4rem;
    border-bottom: 3px solid var(--accent);
}
.qr-header h3 {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1rem;
    color: #fff;
    margin-bottom: 2px;
}
.qr-header p {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.76rem;
    color: rgba(255,255,255,0.55);
}
.qr-image-wrap {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    background: var(--surface-2);
}
.qr-image {
    width: 180px;
    height: 180px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 8px;
    background: #fff;
}
.qr-apps {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    justify-content: center;
}
.app-tag {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 9px;
    border-radius: 3px;
    background: var(--surface);
    color: var(--navy);
    border: 1px solid var(--border);
    letter-spacing: 0.02em;
}
.qr-footer {
    padding: 0.7rem 1.4rem;
    border-top: 1px solid var(--border-light);
    background: var(--surface);
}
.qr-footer p {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.76rem;
    color: var(--text-muted);
    text-align: center;
}

/* Info Card */
.info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.info-card-header {
    background: var(--surface-2);
    padding: 0.85rem 1.4rem;
    border-bottom: 1px solid var(--border-light);
}
.info-card h3 {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 0.95rem;
    color: var(--navy);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 7px;
}
.info-list {
    list-style: none;
    display: flex;
    flex-direction: column;
}
.info-list li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
    padding: 0.75rem 1.4rem;
    border-bottom: 1px solid var(--border-light);
}
.info-list li:last-child { border-bottom: none; }
.info-icon {
    flex-shrink: 0;
    margin-top: 1px;
    color: var(--navy-light);
}
.info-list strong { color: var(--text); font-weight: 600; }

/* Contact Card */
.contact-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.contact-card-header {
    background: var(--surface-2);
    padding: 0.85rem 1.4rem;
    border-bottom: 1px solid var(--border-light);
}
.contact-card h3 {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 0.95rem;
    color: var(--navy);
    font-weight: 700;
}
.contact-card > p {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.78rem;
    color: var(--text-muted);
    padding: 0.6rem 1.4rem 0;
}
.contact-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--navy-light);
    text-decoration: none;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.84rem;
    font-weight: 500;
    padding: 0.65rem 1.4rem;
    border-top: 1px solid var(--border-light);
    transition: color var(--transition), background var(--transition);
}
.contact-link:hover { color: var(--accent); background: var(--accent-light); }

/* ── FOOTER ─────────────────────────────────── */
.site-footer {
    background: var(--navy);
    color: rgba(255,255,255,0.5);
    padding: 1.5rem 2rem;
    margin-top: 1.5rem;
    border-top: 3px solid var(--accent);
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.76rem;
    flex-wrap: wrap;
}
.footer-legal a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color var(--transition);
}
.footer-legal a:hover { color: var(--accent); text-decoration: underline; }

/* ── ANIMATIONS ─────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
.form-panel, .qr-card, .info-card, .contact-card {
    animation: fadeInUp 0.35s ease both;
}
.qr-card    { animation-delay: 0.05s; }
.info-card  { animation-delay: 0.1s; }
.contact-card { animation-delay: 0.15s; }

/* ── LOADING STATE ──────────────────────────── */
.submit-btn.loading .btn-text::after {
    content: '...';
    display: inline-block;
    animation: dots 1s infinite;
}
@keyframes dots {
    0%,100% { content: '.'; }
    33%      { content: '..'; }
    66%      { content: '...'; }
}

/* ── RESPONSIVE ─────────────────────────────── */
@media (max-width: 960px) {
    .form-layout {
        grid-template-columns: 1fr;
    }
    .info-panel {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    .qr-card { grid-column: 1 / -1; }
    .header-meta-strip { display: none; }
    .utility-bar { display: none; }
}
@media (max-width: 640px) {
    .page-title-bar h1 { font-size: 1.2rem; }
    .page-title-issn { display: none; }
    .form-row.two-col { grid-template-columns: 1fr; }
    .info-panel { grid-template-columns: 1fr; }
    form { padding: 1.25rem; }
    .main-content { padding: 1.25rem 1rem 2.5rem; }
    .footer-inner { flex-direction: column; text-align: center; }
    .header-inner { padding: 0 1rem; }
    .page-title-bar { padding: 0 1rem; }
    .breadcrumb-bar { padding: 0 1rem; }
    .checkbox-desc { display: none; }
}