/* ============================================
   EMIR AI LAB KNOWLEDGE UI — MATCH SCREENSHOT 100%
   ============================================ */

:root {
    --bg-main: #F7F6F0;
    --bg-card: #FFFFFF;
    --bg-circle-icon: #ECEFEA;
    
    --text-dark: #1E252B;
    --text-sage: #6B7B66;
    --text-muted: #8E9B8A;
    --text-secondary: #526050;
    
    --accent-sage: #7C8B76;
    --accent-sage-light: #E2E9E0;
    --accent-green-shape: #D6E0D3;
    
    --border-light: rgba(0, 0, 0, 0.06);
    --border-hover: #7C8B76;
    --shadow-soft: 0 6px 20px rgba(0, 0, 0, 0.035);
    --shadow-hover: 0 12px 30px rgba(0, 0, 0, 0.08);
    
    --radius-pill: 100px;
    --radius-card: 20px;
    --radius-modal: 24px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-main);
    color: var(--text-dark);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* Organic Background Shapes */
.bg-shapes {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.shape-top-right {
    position: absolute;
    top: -120px;
    right: -100px;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: var(--accent-green-shape);
    opacity: 0.55;
    filter: blur(40px);
}

.shape-bottom-left {
    position: absolute;
    bottom: -150px;
    left: -120px;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    background: #E4ECE2;
    opacity: 0.6;
    filter: blur(50px);
}

/* App Container */
.app-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 5rem;
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* Page Views Switcher */
.page-view {
    display: none;
    animation: fadeInView 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-view.active {
    display: block;
}

@keyframes fadeInView {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============ PAGE 1: HOME (MATCH SCREENSHOT) ============ */
.hero-center {
    text-align: center;
    padding: 2.5rem 1rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.brand-top-tag {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.28em;
    color: var(--text-sage);
    text-transform: uppercase;
    margin-bottom: 1.25rem;
    position: relative;
}

.brand-top-tag::after {
    content: '';
    display: block;
    width: 32px;
    height: 3px;
    background: var(--text-sage);
    border-radius: 100px;
    margin: 0.6rem auto 0;
    opacity: 0.8;
}

.hero-giant-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 3.8rem;
    font-weight: 900;
    line-height: 1.05;
    color: var(--text-dark);
    letter-spacing: -0.035em;
    margin-bottom: 2rem;
}

.highlight-sage {
    color: var(--text-sage);
    font-weight: 800;
}

.subtitle-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.div-line {
    flex: 1;
    height: 1px;
    background: rgba(107, 123, 102, 0.25);
    position: relative;
}

.div-line::before {
    content: '';
    position: absolute;
    top: -3px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-sage);
}

.div-line:first-child::before { right: 0; }
.div-line:last-child::before { left: 0; }

.div-text {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-sage);
    white-space: nowrap;
}

/* Category Pill Grid */
.categories-pill-grid {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.95rem;
    max-width: 680px;
    margin: 2.5rem auto 3rem;
}

.cat-pill-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1.4rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-soft);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    user-select: none;
}

.cat-icon-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-circle-icon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
    transition: transform 0.25s;
}

.cat-pill-btn:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-hover);
}

.cat-pill-btn:hover .cat-icon-circle {
    transform: scale(1.1) rotate(-8deg);
    background: var(--accent-sage-light);
}

.cat-pill-btn:active {
    transform: translateY(-1px) scale(0.98);
}

/* Home Bottom Action */
.home-bottom-actions {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

.btn-create-post {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.9rem 2.2rem;
    background: var(--text-dark);
    color: white;
    border: none;
    border-radius: var(--radius-pill);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(30, 37, 43, 0.25);
    transition: all 0.25s ease;
}

.btn-create-post:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 35px rgba(30, 37, 43, 0.35);
    background: #0F1418;
}

.btn-icon-plus {
    font-size: 1.3rem;
    line-height: 1;
    font-weight: 800;
}

/* ============ PAGE 2: ARTICLES LIST BY CATEGORY ============ */
.nav-bar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.category-header-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.btn-nav-back {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 1.15rem;
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-pill);
    color: var(--text-dark);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    user-select: none;
}

.btn-nav-back svg {
    transition: transform 0.2s ease;
}

.btn-nav-back:hover {
    background: var(--accent-sage-light);
    border-color: var(--accent-sage);
    transform: translateX(-3px);
    box-shadow: 0 6px 16px rgba(124, 139, 118, 0.18);
}

.btn-nav-back:hover svg {
    transform: translateX(-3px);
}

.btn-nav-back:active {
    transform: translateX(0) scale(0.96);
}

.category-header-title {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    position: relative;
}

.category-header-title.clickable {
    cursor: pointer;
    padding: 0.35rem 0.75rem;
    border-radius: 14px;
    transition: all 0.2s ease;
}

.category-header-title.clickable:hover {
    background: rgba(0, 0, 0, 0.05);
    transform: translateY(-1px);
}

.cat-edit-indicator {
    font-size: 0.85rem;
    opacity: 0.4;
    transition: opacity 0.2s;
    margin-left: 0.2rem;
}

.category-header-title.clickable:hover .cat-edit-indicator {
    opacity: 0.9;
}

/* Plus Circle Action Button */
.btn-plus-action {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--text-dark);
    color: white;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(30, 37, 43, 0.2);
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-plus-action .plus-icon {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

.btn-plus-action:hover {
    transform: scale(1.12) rotate(90deg);
    box-shadow: 0 8px 22px rgba(30, 37, 43, 0.35);
    background: #0F1418;
}

.btn-plus-action:active {
    transform: scale(0.95);
}

/* Option Choice Buttons inside Modal */
.btn-option-choice {
    display: flex;
    align-items: center;
    gap: 0.95rem;
    padding: 0.95rem 1.25rem;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    background: var(--bg-main);
    cursor: pointer;
    text-align: left;
    transition: all 0.25s ease;
    width: 100%;
}

.btn-option-choice:hover {
    background: var(--accent-sage-light);
    border-color: var(--accent-sage);
    transform: translateY(-2px);
}

.btn-option-choice.danger:hover {
    background: rgba(232, 56, 79, 0.12);
    border-color: rgba(232, 56, 79, 0.3);
}

.choice-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
}

.choice-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.choice-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-dark);
}

.choice-desc {
    font-size: 0.78rem;
    color: var(--text-sage);
}

.cat-icon-badge {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--accent-sage-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.category-header-title h2 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-dark);
}

.search-category-row {
    margin-bottom: 2rem;
}

.search-input-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    transition: border-color 0.2s;
}

.search-input-box:focus-within {
    border-color: var(--accent-sage);
    box-shadow: 0 0 0 3px rgba(124, 139, 118, 0.2);
}

.search-input-box input {
    border: none;
    background: none;
    outline: none;
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-dark);
    font-family: inherit;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 1.25rem;
    padding-bottom: 3rem;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card);
    padding: 1.35rem;
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-sage);
}

.card-top-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-sage);
    font-weight: 600;
}

.article-card-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.35;
}

.article-card-excerpt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-top: auto;
    padding-top: 0.5rem;
}

.tag-chip {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    background: var(--accent-sage-light);
    color: var(--text-sage);
}

.empty-articles-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-emoji {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.empty-articles-state h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.empty-articles-state p {
    color: var(--text-sage);
    margin-bottom: 1.5rem;
}

/* ============ PAGE 3: FULL ARTICLE READER ============ */
.reader-container {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--shadow-hover);
    margin-top: 1rem;
}

.reader-meta-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.cat-pill-badge {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 0.35rem 0.9rem;
    border-radius: 100px;
    background: var(--accent-sage-light);
    color: var(--text-sage);
}

.reader-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.reader-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.25;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.reader-tags-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.reader-content-body {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text-dark);
    word-break: break-word;
}

.reader-content-body p { margin-bottom: 1.25rem; }
.reader-content-body h2 { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 1.5rem; margin: 1.75rem 0 0.85rem; }
.reader-content-body ul, .reader-content-body ol { margin-left: 1.5rem; margin-bottom: 1.25rem; }
.reader-content-body code { background: var(--bg-main); padding: 0.2rem 0.5rem; border-radius: 6px; font-family: monospace; font-size: 0.9em; }
.reader-content-body pre { background: #1E252B; color: #F7F6F0; padding: 1.25rem; border-radius: 12px; overflow-x: auto; margin-bottom: 1.5rem; }

.article-actions-top {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.btn-action-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 1.15rem;
    border-radius: 100px;
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.08);
    color: var(--text-dark);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    user-select: none;
}

.btn-action-icon svg {
    transition: transform 0.2s ease, stroke 0.2s ease;
    stroke: var(--text-dark);
}

.btn-action-icon:hover {
    background: var(--accent-sage-light);
    border-color: var(--accent-sage);
    color: var(--text-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(124, 139, 118, 0.22);
}

.btn-action-icon:hover svg {
    transform: rotate(-10deg) scale(1.1);
    stroke: var(--text-dark);
}

.btn-action-icon:active {
    transform: translateY(0) scale(0.96);
}

/* Red Delete Action Button */
.btn-action-icon.btn-danger {
    background: rgba(232, 56, 79, 0.06);
    border: 1px solid rgba(232, 56, 79, 0.16);
    color: #D9384E;
}

.btn-action-icon.btn-danger svg {
    stroke: #D9384E;
}

.btn-action-icon.btn-danger:hover {
    background: #D9384E;
    border-color: #D9384E;
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217, 56, 78, 0.35);
}

.btn-action-icon.btn-danger:hover svg {
    stroke: #FFFFFF;
    transform: scale(1.15) rotate(8deg);
}

.btn-action-icon.btn-danger:active {
    transform: translateY(0) scale(0.96);
}

/* ============ BUTTONS & MODALS ============ */
.btn-primary-sm {
    padding: 0.55rem 1.1rem;
    background: var(--text-dark);
    color: white;
    border: none;
    border-radius: 100px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary-sm:hover { background: #0F1418; transform: translateY(-1px); }

.btn-primary {
    padding: 0.75rem 1.6rem;
    background: var(--text-dark);
    color: white;
    border: none;
    border-radius: 100px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
}

.btn-secondary {
    padding: 0.75rem 1.6rem;
    background: var(--bg-main);
    color: var(--text-dark);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    font-weight: 600;
    cursor: pointer;
}

.btn-danger-fill {
    padding: 0.75rem 1.6rem;
    background: #e8384f;
    color: white;
    border: none;
    border-radius: 100px;
    font-weight: 700;
    cursor: pointer;
}

.btn-inline-secondary {
    padding: 0.5rem 0.85rem;
    background: var(--accent-sage-light);
    color: var(--text-sage);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
}

.category-selection-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-selection-box select {
    flex: 1;
    padding: 0.75rem;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    background: var(--bg-main);
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-dark);
    outline: none;
}

/* Modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(26, 35, 42, 0.45);
    backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    padding: 1.5rem;
}

.modal-overlay.show { opacity: 1; visibility: visible; }

.modal {
    width: 100%;
    max-width: 520px;
    background: var(--bg-card);
    border-radius: var(--radius-modal);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    transform: scale(0.94);
    transition: transform 0.3s ease;
}

.modal-overlay.show .modal { transform: scale(1); }
.modal.modal-lg { max-width: 660px; }
.modal.modal-sm { max-width: 420px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.35rem 1.75rem;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.modal-header h2 { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 1.25rem; font-weight: 800; }

.modal-close { border: none; background: none; font-size: 1.5rem; cursor: pointer; color: var(--text-sage); }

.modal-body { padding: 1.75rem; }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.75rem; padding: 1.25rem 1.75rem; border-top: 1px solid rgba(0,0,0,0.06); }

.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 700; color: var(--text-sage); margin-bottom: 0.45rem; text-transform: uppercase; letter-spacing: 0.04em; }

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    background: var(--bg-main);
    color: var(--text-dark);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group textarea:focus { border-color: var(--accent-sage); }

.emoji-picker { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.emoji-option { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; border: 2px solid var(--border-light); border-radius: 12px; background: transparent; cursor: pointer; }
.emoji-option.selected { border-color: var(--accent-sage); background: var(--accent-sage-light); }

#toast-container { position: fixed; bottom: 2rem; right: 2rem; z-index: 2000; display: flex; flex-direction: column; gap: 0.75rem; }
.toast { padding: 0.9rem 1.4rem; background: var(--text-dark); color: white; border-radius: 100px; font-weight: 600; font-size: 0.88rem; box-shadow: 0 10px 30px rgba(0,0,0,0.2); }