/* ═══════════════════════════════════════════════════════════════
   QUESTO HUB – ACADEMIC CITATION GENERATOR
   Consistent with Luxury Dark Clinical System:
   Solid Charcoal (#1C1F26), Deep Inner (#14171E), Signature Gold (#D4AF37),
   Emerald Teal (#00C2A8), Floating Elevation Shadows, Minimal Executive Buttons
   ═══════════════════════════════════════════════════════════════ */

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

* {
    padding: 0;
    margin: 0;
    -webkit-tap-highlight-color: transparent !important;
}

html, body {
    background-color: #0F1115 !important;
    background: #0F1115 !important;
    background-image: none !important;
    color: #E2E8F0;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden !important;
    max-width: 100vw !important;
    width: 100% !important;
}

/* ═══════════════════════════════════════════════════════════════
   BULLETPROOF FONT AWESOME 6 ICON PROTECTION
   ═══════════════════════════════════════════════════════════════ */
.fa,
.fas,
.fa-solid {
    font-family: "Font Awesome 6 Free" !important;
    font-weight: 900 !important;
    font-style: normal !important;
}

.far,
.fa-regular {
    font-family: "Font Awesome 6 Free" !important;
    font-weight: 400 !important;
    font-style: normal !important;
}

.fab,
.fa-brands,
[class*="fa-brands"] {
    font-family: "Font Awesome 6 Brands" !important;
    font-weight: 400 !important;
    font-style: normal !important;
}

.fa::before,
.fas::before,
.far::before,
.fab::before,
.fa-solid::before,
.fa-regular::before,
.fa-brands::before,
[class*="fa-"]::before {
    font-family: inherit !important;
    font-style: inherit !important;
}

/* ═══════════════════════════════════════════════════════════════
   DESIGN TOKENS
   ═══════════════════════════════════════════════════════════════ */
:root {
    --cit-bg: #0F1115;
    --cit-surface: #1C1F26;
    --cit-surface-inner: #14171E;
    --cit-surface-hover: #222630;
    --cit-border: #252830;
    --cit-border-hover: rgba(212, 175, 55, 0.45);

    --cit-text: #FFFFFF;
    --cit-text-secondary: #E2E8F0;
    --cit-text-muted: #94A3B8;
    --cit-text-dim: #64748B;

    --cit-gold: #D4AF37;
    --cit-gold-bright: #F5D77F;
    --cit-gold-dim: rgba(212, 175, 55, 0.1);
    --cit-gold-border: rgba(212, 175, 55, 0.28);
    --cit-gold-glow: rgba(212, 175, 55, 0.14);

    --cit-teal: #00C2A8;
    --cit-teal-bright: #2DD4BF;
    --cit-teal-dim: rgba(0, 194, 168, 0.1);
    --cit-teal-border: rgba(0, 194, 168, 0.28);
    --cit-teal-glow: rgba(0, 194, 168, 0.14);

    --cit-danger: #FF4D6A;
    --cit-danger-dim: rgba(255, 77, 106, 0.1);
    --cit-danger-border: rgba(255, 77, 106, 0.28);

    --cit-radius: 18px;
    --cit-radius-sm: 8px;
    --cit-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --cit-shadow-card: 0 16px 38px -4px rgba(0, 0, 0, 0.72), 0 6px 16px -2px rgba(0, 0, 0, 0.50);
}

/* Custom Faint Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.18);
}

/* Zero Button & Number Shadows */
button, .btn, .btn-sm, #generateBtn, #doiGenerateBtn, #resetBtn, .btn-fetch-doi, .btn-add-author, .btn-action {
    text-shadow: none !important;
    box-shadow: none !important;
}

/* ═══════════════════════════════════════════════════════════════
   PAGE LAYOUT & PREMIUM HERO
   ═══════════════════════════════════════════════════════════════ */
.citation-page {
    min-height: calc(100vh - 64px);
    padding-top: 64px;
    background-color: var(--cit-bg);
}

.citation-hero {
    background: linear-gradient(180deg, #151922 0%, #0F1115 100%) !important;
    border-bottom: 1px solid var(--cit-border);
    padding: 50px 0 42px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.citation-hero::before {
    content: "";
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 720px;
    height: 250px;
    background: radial-gradient(ellipse at center, rgba(212, 175, 55, 0.08) 0%, rgba(0, 194, 168, 0.035) 45%, transparent 75%);
    pointer-events: none;
    filter: blur(24px);
}

.citation-hero-inner {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

.citation-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 16px;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 700;
    background: var(--cit-gold-dim) !important;
    color: var(--cit-gold) !important;
    border: 1px solid var(--cit-gold-border) !important;
    margin-bottom: 16px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.citation-badge i {
    font-size: 0.74rem;
    color: var(--cit-gold);
}

.citation-hero h1 {
    font-size: clamp(2rem, 3.8vw, 2.7rem);
    font-weight: 800;
    color: #FFFFFF !important;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    line-height: 1.22;
}

.citation-hero h1 .accent-gold {
    background: linear-gradient(135deg, #D4AF37 0%, #F5D77F 50%, #E6C555 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.citation-hero-desc {
    font-size: 0.96rem;
    color: var(--cit-text-muted) !important;
    line-height: 1.65;
    max-width: 620px;
    margin: 0 auto 20px;
}

/* Hero Quick Interactive Style Tags */
.citation-hero-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.citation-hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 999px;
    background: #14171E !important;
    border: 1px solid #252830 !important;
    font-size: 0.76rem;
    font-weight: 600;
    color: #94A3B8 !important;
    text-decoration: none;
    transition: var(--cit-transition);
}

.citation-hero-tag i {
    color: var(--cit-gold);
    font-size: 0.72rem;
}

.citation-hero-tag:hover {
    background: #1C1F26 !important;
    border-color: rgba(212, 175, 55, 0.45) !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

.citation-hero-tag.tag-teal {
    border-color: rgba(0, 194, 168, 0.3) !important;
    color: #E2E8F0 !important;
}

.citation-hero-tag.tag-teal i {
    color: var(--cit-teal);
}

.citation-hero-tag.tag-teal:hover {
    border-color: var(--cit-teal) !important;
    background: rgba(0, 194, 168, 0.1) !important;
    color: #FFFFFF !important;
}

/* ═══════════════════════════════════════════════════════════════
   CONTAINER & SECTION CARDS
   ═══════════════════════════════════════════════════════════════ */
.citation-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 34px 20px 80px;
}

.citation-section {
    background: var(--cit-surface) !important;
    border: 1px solid var(--cit-border) !important;
    border-radius: var(--cit-radius);
    padding: 32px;
    margin-bottom: 30px;
    box-shadow: var(--cit-shadow-card) !important;
    transition: var(--cit-transition);
    position: relative;
    overflow: hidden;
    animation: fadeSlideUp 0.35s ease both;
}

#manualSection {
    border-top: 2.5px solid var(--cit-gold) !important;
}

#doiSection {
    border-top: 2.5px solid var(--cit-teal) !important;
    animation-delay: 0.1s;
}

.citation-section:hover {
    border-color: rgba(255, 255, 255, 0.13) !important;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ═══════════════════════════════════════════════════════════════
   SECTION HEADERS
   ═══════════════════════════════════════════════════════════════ */
.section-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--cit-border);
}

.section-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}

#manualSection .section-icon {
    background: var(--cit-gold-dim) !important;
    border: 1px solid var(--cit-gold-border) !important;
    color: var(--cit-gold) !important;
}

#doiSection .section-icon {
    background: var(--cit-teal-dim) !important;
    border: 1px solid var(--cit-teal-border) !important;
    color: var(--cit-teal) !important;
}

.section-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #FFFFFF !important;
    margin: 0 0 3px;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 0.86rem;
    color: var(--cit-text-muted) !important;
    margin: 0;
    line-height: 1.5;
}

/* ═══════════════════════════════════════════════════════════════
   FORMS & INPUTS
   ═══════════════════════════════════════════════════════════════ */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}

.form-grid > * {
    min-width: 0;
}

.form-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 14px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--cit-text-secondary) !important;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.required {
    color: var(--cit-danger) !important;
    font-weight: 700;
}

.optional {
    color: var(--cit-text-dim) !important;
    font-weight: 400;
    font-size: 0.74rem;
    margin-left: 4px;
}

.form-group input,
.form-group select {
    background: var(--cit-surface-inner) !important;
    border: 1px solid var(--cit-border) !important;
    border-radius: 8px;
    padding: 10px 14px;
    height: 40px;
    width: 100%;
    min-width: 0;
    font-size: 0.88rem;
    font-family: "Inter", sans-serif;
    color: #FFFFFF !important;
    transition: var(--cit-transition);
    outline: none;
    box-shadow: none !important;
}

.form-group input::placeholder {
    color: var(--cit-text-dim) !important;
    opacity: 0.8;
}

#manualSection .form-group input:focus,
#manualSection .form-group select:focus {
    border-color: var(--cit-gold) !important;
    background: #171B24 !important;
    box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.15) !important;
}

#doiSection .form-group input:focus,
#doiSection .form-group select:focus {
    border-color: var(--cit-teal) !important;
    background: #171B24 !important;
    box-shadow: 0 0 0 2px rgba(0, 194, 168, 0.15) !important;
}

.form-group input.input-error {
    border-color: var(--cit-danger) !important;
    box-shadow: 0 0 0 2px rgba(255, 77, 106, 0.2) !important;
    background: rgba(255, 77, 106, 0.05) !important;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='7' viewBox='0 0 10 7' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L5 5.5L9 1.5' stroke='%23D4AF37' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 14px center !important;
    padding-right: 36px;
}

#doiSection .form-group select {
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='7' viewBox='0 0 10 7' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L5 5.5L9 1.5' stroke='%2300C2A8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") !important;
}

.form-group select option {
    background: #14171E !important;
    color: #FFFFFF !important;
    padding: 10px;
}

/* ═══════════════════════════════════════════════════════════════
   AUTHORS MANAGEMENT
   ═══════════════════════════════════════════════════════════════ */
.authors-group {
    margin-bottom: 18px;
}

.author-row {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.author-row input {
    flex: 1;
    background: var(--cit-surface-inner) !important;
    border: 1px solid var(--cit-border) !important;
    border-radius: 8px;
    padding: 10px 14px;
    height: 40px;
    font-size: 0.88rem;
    font-family: "Inter", sans-serif;
    color: #FFFFFF !important;
    transition: var(--cit-transition);
    outline: none;
    box-shadow: none !important;
}

.author-row input::placeholder {
    color: var(--cit-text-dim) !important;
    opacity: 0.8;
}

.author-row input:focus {
    border-color: var(--cit-gold) !important;
    background: #171B24 !important;
    box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.15) !important;
}

.btn-remove-author {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    border: 1px solid var(--cit-danger-border) !important;
    background: var(--cit-danger-dim) !important;
    color: var(--cit-danger) !important;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--cit-transition);
    flex-shrink: 0;
    box-shadow: none !important;
}

.btn-remove-author:hover {
    background: rgba(255, 77, 106, 0.22) !important;
    border-color: var(--cit-danger) !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

.btn-add-author {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 15px;
    border-radius: 8px;
    border: 1px dashed var(--cit-gold-border) !important;
    background: var(--cit-gold-dim) !important;
    color: var(--cit-gold) !important;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--cit-transition);
    font-family: "Inter", sans-serif;
    margin-top: 4px;
    box-shadow: none !important;
}

.btn-add-author:hover {
    background: rgba(212, 175, 55, 0.18) !important;
    border-color: var(--cit-gold) !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

/* ═══════════════════════════════════════════════════════════════
   DOI AUTO-FILL BUTTON
   ═══════════════════════════════════════════════════════════════ */
.input-with-button {
    display: flex;
    gap: 8px;
    align-items: center;
}

.input-with-button input {
    flex: 1;
    height: 40px;
}

.btn-fetch-doi {
    padding: 0 14px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--cit-teal-border) !important;
    background: var(--cit-teal-dim) !important;
    color: var(--cit-teal) !important;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: "Inter", sans-serif;
    cursor: pointer;
    transition: var(--cit-transition);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: none !important;
}

.btn-fetch-doi:hover {
    background: rgba(0, 194, 168, 0.22) !important;
    border-color: var(--cit-teal) !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

.btn-fetch-doi:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-fetch-doi i.fa-spinner {
    animation: spin 1s linear infinite;
}

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

/* ═══════════════════════════════════════════════════════════════
   ACTION BUTTONS (Basic, Sleek, Chic, Compact – Drug Recalls Style)
   ═══════════════════════════════════════════════════════════════ */
.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 14px;
    align-items: center;
}

/* Generate Manual Citation Button (Subtle Gold Tint, Clean & Compact) */
#generateBtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 7px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: "Inter", sans-serif;
    border-radius: 8px;
    border: 1px solid rgba(212, 175, 55, 0.35) !important;
    background: rgba(212, 175, 55, 0.12) !important;
    color: #D4AF37 !important;
    cursor: pointer;
    transition: var(--cit-transition);
    text-shadow: none !important;
    box-shadow: none !important;
    line-height: 1.35;
}

#generateBtn:hover {
    background: rgba(212, 175, 55, 0.24) !important;
    border-color: #D4AF37 !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

/* Generate DOI Citation Button (Subtle Teal Tint, Clean & Compact) */
#doiGenerateBtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 7px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: "Inter", sans-serif;
    border-radius: 8px;
    border: 1px solid rgba(0, 194, 168, 0.35) !important;
    background: rgba(0, 194, 168, 0.12) !important;
    color: #00C2A8 !important;
    cursor: pointer;
    transition: var(--cit-transition);
    text-shadow: none !important;
    box-shadow: none !important;
    line-height: 1.35;
}

#doiGenerateBtn:hover {
    background: rgba(0, 194, 168, 0.24) !important;
    border-color: #00C2A8 !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

/* Reset Button */
#resetBtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 7px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: "Inter", sans-serif;
    border-radius: 8px;
    border: 1px solid #252830 !important;
    background: #14171E !important;
    color: var(--cit-text-muted) !important;
    cursor: pointer;
    transition: var(--cit-transition);
    text-shadow: none !important;
    box-shadow: none !important;
    line-height: 1.35;
}

#resetBtn:hover {
    background: #222630 !important;
    border-color: rgba(212, 175, 55, 0.4) !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

#generateBtn:disabled,
#doiGenerateBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Fallback .btn-sm & .btn-success */
.btn-sm {
    padding: 7px 15px;
    font-size: 0.82rem;
    border-radius: 8px;
    border: 1px solid var(--cit-border);
    background: var(--cit-surface-inner);
    color: var(--cit-text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 7px;
    transition: var(--cit-transition);
    cursor: pointer;
    font-family: "Inter", sans-serif;
}

.btn-sm.btn-success,
.btn-success {
    background: var(--cit-teal-dim) !important;
    border-color: var(--cit-teal-border) !important;
    color: var(--cit-teal) !important;
}

.btn-sm.btn-success:hover,
.btn-success:hover {
    background: rgba(0, 194, 168, 0.22) !important;
    border-color: var(--cit-teal) !important;
    color: #FFFFFF !important;
}

/* ═══════════════════════════════════════════════════════════════
   DOI INFO BOX
   ═══════════════════════════════════════════════════════════════ */
.doi-info-box {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 16px 20px;
    background: var(--cit-surface-inner) !important;
    border: 1px solid var(--cit-border) !important;
    border-left: 3px solid var(--cit-gold) !important;
    border-radius: 10px;
    margin-bottom: 22px;
}

.doi-info-box > i {
    color: var(--cit-gold) !important;
    font-size: 1.15rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.doi-info-box strong {
    font-size: 0.88rem;
    color: #FFFFFF !important;
    display: block;
    margin-bottom: 3px;
}

.doi-info-box p {
    font-size: 0.82rem;
    color: var(--cit-text-muted) !important;
    margin: 0;
    line-height: 1.6;
}

.doi-info-box code {
    background: rgba(212, 175, 55, 0.12) !important;
    border: 1px solid rgba(212, 175, 55, 0.25) !important;
    padding: 2px 7px;
    border-radius: 5px;
    font-size: 0.78rem;
    color: var(--cit-gold-bright) !important;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* ═══════════════════════════════════════════════════════════════
   CITATION OUTPUT BOX
   ═══════════════════════════════════════════════════════════════ */
.citation-output {
    margin-top: 24px;
    background: var(--cit-surface-inner) !important;
    border: 1px solid var(--cit-border) !important;
    border-radius: 12px;
    padding: 22px;
    animation: fadeSlideUp 0.3s ease;
}

#manualOutput {
    border-left: 3px solid var(--cit-gold) !important;
}

#doiOutput {
    border-left: 3px solid var(--cit-teal) !important;
}

.output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    gap: 10px;
    flex-wrap: wrap;
}

.output-header h3 {
    font-size: 0.98rem;
    font-weight: 700;
    color: #FFFFFF !important;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

#manualOutput .output-header h3 i {
    color: var(--cit-gold) !important;
}

#doiOutput .output-header h3 i {
    color: var(--cit-teal) !important;
}

.output-style-badge {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    background: var(--cit-gold-dim) !important;
    color: var(--cit-gold) !important;
    border: 1px solid var(--cit-gold-border) !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#doiOutputStyleBadge {
    background: var(--cit-teal-dim) !important;
    color: var(--cit-teal) !important;
    border: 1px solid var(--cit-teal-border) !important;
}

.citation-result {
    font-size: 0.92rem;
    line-height: 1.8;
    color: #F8FAFC !important;
    padding: 16px 18px;
    background: #0F1115 !important;
    border-radius: 8px;
    border: 1px solid var(--cit-border) !important;
    word-wrap: break-word;
    user-select: text;
    font-family: "Inter", sans-serif;
}

.citation-result i {
    font-style: italic;
    color: #FFFFFF;
}

.output-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 8px;
    border: 1px solid var(--cit-border) !important;
    background: var(--cit-surface) !important;
    color: var(--cit-text-secondary) !important;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: "Inter", sans-serif;
    cursor: pointer;
    transition: var(--cit-transition);
    box-shadow: none !important;
}

.btn-action:hover {
    background: var(--cit-surface-hover) !important;
    border-color: rgba(255, 255, 255, 0.25) !important;
    color: #FFFFFF !important;
    transform: translateY(-1px);
}

.btn-copy {
    background: var(--cit-gold-dim) !important;
    border-color: var(--cit-gold-border) !important;
    color: var(--cit-gold) !important;
}

.btn-copy:hover {
    background: rgba(212, 175, 55, 0.22) !important;
    border-color: var(--cit-gold) !important;
    color: #FFFFFF !important;
}

.btn-download-pdf {
    background: var(--cit-danger-dim) !important;
    border-color: var(--cit-danger-border) !important;
    color: var(--cit-danger) !important;
}

.btn-download-pdf:hover {
    background: rgba(255, 77, 106, 0.2) !important;
    border-color: var(--cit-danger) !important;
    color: #FFFFFF !important;
}

/* ═══════════════════════════════════════════════════════════════
   DOI METADATA PREVIEW
   ═══════════════════════════════════════════════════════════════ */
.metadata-preview {
    margin-top: 16px;
    border-top: 1px solid var(--cit-border) !important;
    padding-top: 12px;
}

.btn-toggle-meta {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 0;
    border: none;
    background: none;
    color: var(--cit-teal) !important;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: "Inter", sans-serif;
    cursor: pointer;
    transition: color 0.2s;
    box-shadow: none !important;
}

.btn-toggle-meta:hover {
    color: var(--cit-teal-bright) !important;
}

.btn-toggle-meta.open i {
    transform: rotate(180deg);
}

.btn-toggle-meta i {
    transition: transform 0.2s ease;
    font-size: 0.7rem;
}

.meta-details {
    padding-top: 12px;
}

.meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    background: #0F1115 !important;
    border: 1px solid var(--cit-border) !important;
    border-radius: 10px;
    padding: 14px;
}

.meta-item {
    font-size: 0.8rem;
}

.meta-item .meta-label {
    color: var(--cit-text-dim) !important;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.68rem;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.meta-item .meta-value {
    color: #FFFFFF !important;
    font-weight: 500;
    word-break: break-word;
}

/* ═══════════════════════════════════════════════════════════════
   DOI LOADING & ERROR STATES
   ═══════════════════════════════════════════════════════════════ */
.doi-loading {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    margin-top: 14px;
    color: var(--cit-teal) !important;
    font-size: 0.86rem;
    background: var(--cit-teal-dim) !important;
    border: 1px solid var(--cit-teal-border) !important;
    border-radius: 8px;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(0, 194, 168, 0.2);
    border-top-color: var(--cit-teal) !important;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

.doi-error {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    margin-top: 14px;
    background: var(--cit-danger-dim) !important;
    border: 1px solid var(--cit-danger-border) !important;
    border-radius: 8px;
    color: var(--cit-danger) !important;
    font-size: 0.85rem;
    animation: fadeIn 0.3s ease;
}

.doi-error i {
    font-size: 1rem;
    flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   TOAST NOTIFICATION
   ═══════════════════════════════════════════════════════════════ */
.citation-toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.86rem;
    color: #FFFFFF !important;
    background: var(--cit-surface) !important;
    border: 1px solid rgba(0, 194, 168, 0.4) !important;
    box-shadow: var(--cit-shadow-card) !important;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.citation-toast i {
    color: var(--cit-teal) !important;
    font-size: 1rem;
}

.citation-toast.error {
    border-color: rgba(255, 77, 106, 0.4) !important;
}

.citation-toast.error i {
    color: var(--cit-danger) !important;
}

.citation-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .citation-hero {
        padding: 42px 0 32px;
    }

    .citation-hero h1 {
        font-size: 1.8rem;
    }

    .citation-hero-desc {
        font-size: 0.9rem;
    }

    .citation-container {
        padding: 22px 14px 60px;
    }

    .citation-section {
        padding: 22px 16px;
        border-radius: 14px;
        margin-bottom: 22px;
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .form-grid-4 {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .section-header {
        gap: 12px;
    }

    .form-actions {
        flex-direction: row;
        flex-wrap: wrap;
    }

    #generateBtn,
    #doiGenerateBtn,
    #resetBtn {
        flex: 1;
        justify-content: center;
    }

    .output-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .meta-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .citation-hero {
        padding: 34px 0 26px;
    }

    .citation-hero h1 {
        font-size: 1.5rem;
    }

    .citation-badge {
        font-size: 0.7rem;
        padding: 4px 12px;
    }

    .citation-container {
        padding: 18px 10px 50px;
    }

    .citation-section {
        padding: 18px 12px;
        border-radius: 10px;
    }

    .form-grid-4 {
        grid-template-columns: 1fr;
    }

    .author-row {
        flex-wrap: wrap;
    }

    .output-actions {
        flex-direction: column;
    }

    .btn-action {
        width: 100%;
        justify-content: center;
    }

    .input-with-button {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-fetch-doi {
        justify-content: center;
        width: 100%;
    }
}