/* Scholarfy - Design System v3 */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&display=swap');

/* ============================================================
   LIGHT MODE (default)
   ============================================================ */
:root {
    --color-bg:            #f0f2f8;
    --color-bg-card:       #ffffff;
    --color-bg-input:      #f5f6fa;
    --color-bg-sidebar:    #ffffff;
    --color-border:        #e4e8f0;
    --color-border-light:  #edf0f7;
    --color-primary:       #4f46e5;
    --color-primary-dark:  #3730a3;
    --color-primary-light: #818cf8;
    --color-primary-glow:  rgba(79,70,229,0.12);
    --color-primary-soft:  rgba(79,70,229,0.08);
    --color-accent:        #7c3aed;
    --color-accent-soft:   rgba(124,58,237,0.1);
    --color-success:       #10b981;
    --color-success-soft:  rgba(16,185,129,0.1);
    --color-warning:       #f59e0b;
    --color-warning-soft:  rgba(245,158,11,0.1);
    --color-danger:        #ef4444;
    --color-danger-soft:   rgba(239,68,68,0.1);
    --color-info:          #3b82f6;
    --color-info-soft:     rgba(59,130,246,0.1);
    --color-text:          #0f172a;
    --color-text-muted:    #64748b;
    --color-text-dim:      #94a3b8;
    --color-text-inverse:  #ffffff;
    --font-main:           'Sora', -apple-system, sans-serif;
    --radius-xs:           4px;
    --radius-sm:           8px;
    --radius-md:           12px;
    --radius-lg:           16px;
    --radius-xl:           24px;
    --radius-full:         9999px;
    --shadow-xs:           0 1px 3px rgba(15,23,42,0.06);
    --shadow-sm:           0 2px 8px rgba(15,23,42,0.08);
    --shadow-md:           0 4px 16px rgba(15,23,42,0.10);
    --shadow-lg:           0 8px 32px rgba(15,23,42,0.12);
    --shadow-primary:      0 4px 20px rgba(79,70,229,0.25);
    --transition:          all 0.2s ease;
    --transition-slow:     all 0.35s ease;
    --sidebar-width:       240px;
}

/* ============================================================
   DARK MODE
   ============================================================ */
[data-theme="dark"] {
    --color-bg:            #0f172a;
    --color-bg-card:       #1e293b;
    --color-bg-input:      #0f172a;
    --color-bg-sidebar:    #1e293b;
    --color-border:        #334155;
    --color-border-light:  #1e293b;
    --color-primary:       #818cf8;
    --color-primary-dark:  #6366f1;
    --color-primary-light: #a5b4fc;
    --color-primary-glow:  rgba(129,140,248,0.15);
    --color-primary-soft:  rgba(129,140,248,0.1);
    --color-accent:        #a78bfa;
    --color-accent-soft:   rgba(167,139,250,0.1);
    --color-success:       #34d399;
    --color-success-soft:  rgba(52,211,153,0.1);
    --color-warning:       #fbbf24;
    --color-warning-soft:  rgba(251,191,36,0.1);
    --color-danger:        #f87171;
    --color-danger-soft:   rgba(248,113,113,0.1);
    --color-info:          #60a5fa;
    --color-info-soft:     rgba(96,165,250,0.1);
    --color-text:          #f1f5f9;
    --color-text-muted:    #94a3b8;
    --color-text-dim:      #64748b;
    --color-text-inverse:  #0f172a;
    --shadow-xs:           0 1px 3px rgba(0,0,0,0.3);
    --shadow-sm:           0 2px 8px rgba(0,0,0,0.4);
    --shadow-md:           0 4px 16px rgba(0,0,0,0.5);
    --shadow-lg:           0 8px 32px rgba(0,0,0,0.6);
    --shadow-primary:      0 4px 20px rgba(129,140,248,0.3);
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-main); background-color: var(--color-bg); color: var(--color-text); line-height: 1.6; min-height: 100vh; transition: background-color 0.3s ease, color 0.3s ease; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; display: block; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.25; color: var(--color-text); letter-spacing: -0.02em; }
h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.0625rem; }
p  { color: var(--color-text-muted); line-height: 1.7; }
.text-muted    { color: var(--color-text-muted); }
.text-dim      { color: var(--color-text-dim); }
.text-small    { font-size: 0.875rem; }
.text-xs       { font-size: 0.75rem; }
.text-center   { text-align: center; }
.font-bold     { font-weight: 700; }
.font-semibold { font-weight: 600; }

/* ============================================================
   LAYOUT
   ============================================================ */
.app-wrapper { display: flex; min-height: 100vh; }

.app-sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-sidebar);
    border-right: 1px solid var(--color-border);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; height: 100vh;
    z-index: 100; box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease;
}

.app-main { margin-left: var(--sidebar-width); flex: 1; padding: 2rem 2.5rem; max-width: 1280px; }

.app-topbar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 2rem; padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar-logo { padding: 1.25rem 1.5rem 1rem; border-bottom: 1px solid var(--color-border); }
.sidebar-logo-text { font-size: 1.375rem; font-weight: 800; color: var(--color-text); letter-spacing: -0.04em; }
.sidebar-logo-text span { color: var(--color-primary); }

.sidebar-nav { flex: 1; padding: 0.75rem 0.75rem; overflow-y: auto; }
.sidebar-nav-item {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.6rem 0.875rem; border-radius: var(--radius-md);
    color: var(--color-text-muted); font-size: 0.875rem; font-weight: 500;
    transition: var(--transition); margin-bottom: 0.2rem; cursor: pointer;
}
.sidebar-nav-item:hover  { background: var(--color-primary-soft); color: var(--color-primary); }
.sidebar-nav-item.active { background: var(--color-primary-glow); color: var(--color-primary); font-weight: 600; }
.sidebar-nav-item svg    { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--color-border); background: var(--color-bg); }

/* Theme/Lang toggles in sidebar */
.sidebar-toggles { padding: 0.75rem; border-top: 1px solid var(--color-border); display: flex; gap: 0.5rem; }
.toggle-btn {
    flex: 1; display: flex; align-items: center; justify-content: center; gap: 0.375rem;
    padding: 0.4rem 0.5rem; border-radius: var(--radius-sm); border: 1.5px solid var(--color-border);
    background: var(--color-bg-input); color: var(--color-text-muted);
    font-size: 0.75rem; font-weight: 600; cursor: pointer; transition: var(--transition);
    font-family: var(--font-main);
}
.toggle-btn:hover  { border-color: var(--color-primary); color: var(--color-primary); }
.toggle-btn.active { background: var(--color-primary-glow); border-color: var(--color-primary); color: var(--color-primary); }
.toggle-btn svg    { width: 14px; height: 14px; }

/* ============================================================
   CARDS
   ============================================================ */
.card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow-xs); transition: var(--transition); }
.card:hover { box-shadow: var(--shadow-sm); }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.25rem; }
.card-title { font-size: 0.9375rem; font-weight: 600; color: var(--color-text); }
.card-subtitle { font-size: 0.8rem; color: var(--color-text-dim); margin-top: 0.2rem; }
.card-primary { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); border: none; }
.card-primary .card-title, .card-primary p { color: white; }

/* ============================================================
   SCORE CARDS
   ============================================================ */
.score-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.5rem 1.25rem; text-align: center; transition: var(--transition); position: relative; overflow: hidden; }
.score-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.score-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.score-value { font-size: 2.75rem; font-weight: 800; line-height: 1; margin-bottom: 0.35rem; letter-spacing: -0.04em; }
.score-label { font-size: 0.7rem; color: var(--color-text-dim); text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; }
.score-high    { color: var(--color-success); }
.score-medium  { color: var(--color-warning); }
.score-low     { color: var(--color-danger); }
.score-primary { color: var(--color-primary); }

/* ============================================================
   METRICS
   ============================================================ */
.metric-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1rem; }
.metric-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.25rem; transition: var(--transition); }
.metric-card:hover { border-color: var(--color-primary-light); box-shadow: var(--shadow-sm); }
.metric-value { font-size: 1.875rem; font-weight: 800; color: var(--color-text); letter-spacing: -0.03em; line-height: 1; margin-bottom: 0.375rem; }
.metric-label { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 500; }
.metric-source { font-size: 0.7rem; color: var(--color-text-dim); margin-top: 0.375rem; display: flex; align-items: center; gap: 0.25rem; }
.metric-source::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary-light); }
.metric-desc { font-size: 0.7rem; color: var(--color-text-dim); margin-top: 0.375rem; line-height: 1.4; }

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.8125rem; font-weight: 600; color: var(--color-text); margin-bottom: 0.5rem; letter-spacing: 0.01em; }
.form-input, .form-select, .form-textarea {
    width: 100%; background: var(--color-bg-input); border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md); color: var(--color-text); font-size: 0.9rem;
    padding: 0.7rem 1rem; transition: var(--transition); outline: none; font-family: var(--font-main);
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--color-primary); background: var(--color-bg-card); box-shadow: 0 0 0 3px var(--color-primary-glow); }
.form-input::placeholder { color: var(--color-text-dim); }
.form-textarea { resize: vertical; min-height: 100px; }
.form-hint  { font-size: 0.775rem; color: var(--color-text-dim); margin-top: 0.375rem; }
.form-error { font-size: 0.775rem; color: var(--color-danger); margin-top: 0.375rem; font-weight: 500; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.65rem 1.375rem; border-radius: var(--radius-full); font-size: 0.875rem; font-weight: 600; cursor: pointer; border: none; transition: var(--transition); text-decoration: none; font-family: var(--font-main); white-space: nowrap; letter-spacing: 0.01em; }
.btn-primary { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); color: white; box-shadow: var(--shadow-primary); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(79,70,229,0.35); color: white; }
.btn-secondary { background: var(--color-bg-card); color: var(--color-text-muted); border: 1.5px solid var(--color-border); }
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-soft); }
.btn-danger { background: var(--color-danger); color: white; }
.btn-danger:hover { opacity: 0.9; color: white; }
.btn-ghost { background: transparent; color: var(--color-text-muted); border: none; }
.btn-ghost:hover { background: var(--color-bg-input); color: var(--color-text); }
.btn-sm  { padding: 0.4rem 1rem; font-size: 0.8rem; }
.btn-lg  { padding: 0.875rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

/* ============================================================
   ALERTS
   ============================================================ */
.alert { padding: 0.875rem 1.125rem; border-radius: var(--radius-md); font-size: 0.875rem; margin-bottom: 1rem; border: 1px solid transparent; font-weight: 500; display: flex; align-items: flex-start; gap: 0.625rem; }
.alert-success { background: var(--color-success-soft); border-color: rgba(16,185,129,0.2); color: var(--color-success); }
.alert-warning { background: var(--color-warning-soft); border-color: rgba(245,158,11,0.2); color: var(--color-warning); }
.alert-danger  { background: var(--color-danger-soft);  border-color: rgba(239,68,68,0.2);  color: var(--color-danger); }
.alert-info    { background: var(--color-info-soft);    border-color: rgba(59,130,246,0.2);  color: var(--color-info); }

/* ============================================================
   BADGES
   ============================================================ */
.badge { display: inline-flex; align-items: center; padding: 0.25rem 0.75rem; border-radius: var(--radius-full); font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.badge-success { background: var(--color-success-soft); color: var(--color-success); }
.badge-warning { background: var(--color-warning-soft); color: var(--color-warning); }
.badge-danger  { background: var(--color-danger-soft);  color: var(--color-danger); }
.badge-primary { background: var(--color-primary-glow); color: var(--color-primary); }
.badge-accent  { background: var(--color-accent-soft);  color: var(--color-accent); }
.badge-dim     { background: var(--color-bg-input);     color: var(--color-text-dim); }

/* ============================================================
   TABLES
   ============================================================ */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.table th { background: var(--color-bg); color: var(--color-text-dim); font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--color-border); }
.table td { padding: 0.875rem 1rem; border-bottom: 1px solid var(--color-border-light); color: var(--color-text-muted); vertical-align: middle; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--color-bg); }

/* ============================================================
   AUTH
   ============================================================ */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 2rem; background: linear-gradient(135deg, #eef2ff 0%, #f0f2f8 50%, #ede9fe 100%); }
[data-theme="dark"] .auth-page { background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%); }
.auth-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 2.5rem; width: 100%; max-width: 440px; box-shadow: var(--shadow-lg); }
.auth-logo { text-align: center; margin-bottom: 2rem; }
.auth-logo-text { font-size: 1.875rem; font-weight: 800; letter-spacing: -0.04em; color: var(--color-text); }
.auth-logo-text span { color: var(--color-primary); }
.auth-title { font-size: 1.375rem; font-weight: 700; margin-bottom: 0.375rem; text-align: center; }
.auth-subtitle { font-size: 0.875rem; color: var(--color-text-muted); text-align: center; margin-bottom: 2rem; }

/* ============================================================
   ANALYSIS STATUS
   ============================================================ */
.analysis-status-card { text-align: center; padding: 3rem 2rem; }
.analysis-status-title { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--color-text); }

/* ============================================================
   LOCKED
   ============================================================ */
.locked-section { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.locked-overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 0%, rgba(240,242,248,0.95) 50%); display: flex; flex-direction: column; align-items: center; justify-content: flex-end; padding: 2rem; text-align: center; }
[data-theme="dark"] .locked-overlay { background: linear-gradient(to bottom, transparent 0%, rgba(15,23,42,0.95) 50%); }
.locked-cta { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); color: white; padding: 0.75rem 2rem; border-radius: var(--radius-full); font-weight: 700; font-size: 0.875rem; display: inline-block; margin-top: 1rem; transition: var(--transition); box-shadow: var(--shadow-primary); cursor: pointer; }
.locked-cta:hover { transform: translateY(-2px); color: white; }

/* ============================================================
   SPINNER
   ============================================================ */
.spinner { width: 40px; height: 40px; border: 3px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ============================================================
   SOURCE PILLS
   ============================================================ */
.source-pill { display: inline-flex; align-items: center; gap: 0.375rem; padding: 0.35rem 0.875rem; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600; border: 1.5px solid var(--color-border); background: var(--color-bg-card); color: var(--color-text-muted); transition: var(--transition); }
.source-pill.ok      { border-color: rgba(16,185,129,0.3); background: var(--color-success-soft); color: var(--color-success); }
.source-pill.fail    { border-color: rgba(239,68,68,0.3);  background: var(--color-danger-soft);  color: var(--color-danger); }
.source-pill.loading { border-color: rgba(79,70,229,0.3);  background: var(--color-primary-glow); color: var(--color-primary); }
.source-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

/* ============================================================
   PROFILE
   ============================================================ */
.profile-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 2rem; box-shadow: var(--shadow-sm); display: flex; align-items: flex-start; gap: 1.5rem; }
.profile-avatar { width: 72px; height: 72px; border-radius: var(--radius-xl); background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: 800; color: white; flex-shrink: 0; box-shadow: var(--shadow-primary); }
.profile-avatar-fallback { width: 72px; height: 72px; border-radius: var(--radius-xl); background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); display: flex; align-items: center; justify-content: center; font-size: 1.375rem; font-weight: 800; color: white; flex-shrink: 0; box-shadow: var(--shadow-primary); }
.profile-name { font-size: 1.375rem; font-weight: 700; color: var(--color-text); letter-spacing: -0.02em; margin-bottom: 0.25rem; }
.profile-institution { font-size: 0.875rem; color: var(--color-text-muted); font-weight: 500; margin-bottom: 0.75rem; }
.profile-tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.profile-tag { background: var(--color-primary-soft); color: var(--color-primary); border-radius: var(--radius-full); padding: 0.2rem 0.7rem; font-size: 0.7rem; font-weight: 600; }

/* ============================================================
   TOPIC TAGS
   ============================================================ */
.topic-tag { display: inline-flex; align-items: center; padding: 0.375rem 0.875rem; border-radius: var(--radius-full); font-size: 0.775rem; font-weight: 600; background: var(--color-bg-input); color: var(--color-text-muted); border: 1px solid var(--color-border); transition: var(--transition); }
.topic-tag:hover { background: var(--color-primary-soft); color: var(--color-primary); border-color: var(--color-primary-light); }

/* ============================================================
   WIKIDATA
   ============================================================ */
.wikidata-card { background: linear-gradient(135deg, #faf5ff 0%, #ede9fe 100%); border: 1px solid rgba(124,58,237,0.2); border-radius: var(--radius-lg); padding: 1.5rem; }
[data-theme="dark"] .wikidata-card { background: linear-gradient(135deg, #1e1b4b 0%, #2e1065 100%); border-color: rgba(167,139,250,0.2); }
.wikidata-row { display: flex; align-items: baseline; justify-content: space-between; padding: 0.625rem 0; border-bottom: 1px solid rgba(124,58,237,0.1); font-size: 0.875rem; }
.wikidata-row:last-child { border-bottom: none; }
.wikidata-key   { color: var(--color-text-dim); font-weight: 500; min-width: 140px; font-size: 0.8rem; }
.wikidata-value { color: var(--color-text); font-weight: 600; text-align: right; }

/* ============================================================
   GAPS / RECS
   ============================================================ */
.gap-item { display: flex; align-items: flex-start; gap: 0.875rem; padding: 1rem; border-radius: var(--radius-md); border: 1px solid var(--color-border); background: var(--color-bg-card); margin-bottom: 0.75rem; transition: var(--transition); }
.gap-item:hover { box-shadow: var(--shadow-sm); }
.gap-icon { width: 36px; height: 36px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.gap-icon.critical { background: var(--color-danger-soft); color: var(--color-danger); }
.gap-icon.warning  { background: var(--color-warning-soft); color: var(--color-warning); }
.gap-icon.info     { background: var(--color-info-soft); color: var(--color-info); }
.gap-title { font-size: 0.875rem; font-weight: 600; color: var(--color-text); margin-bottom: 0.2rem; }
.gap-desc  { font-size: 0.8rem; color: var(--color-text-muted); }

.rec-item { display: flex; align-items: flex-start; gap: 0.875rem; padding: 1.125rem; border-radius: var(--radius-md); border: 1px solid var(--color-border); background: var(--color-bg-card); margin-bottom: 0.75rem; transition: var(--transition); }
.rec-item:hover { border-color: var(--color-primary-light); box-shadow: var(--shadow-sm); }
.rec-priority { width: 32px; height: 32px; border-radius: var(--radius-sm); background: var(--color-primary-soft); color: var(--color-primary); display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 800; flex-shrink: 0; }
.rec-title { font-size: 0.875rem; font-weight: 600; color: var(--color-text); margin-bottom: 0.25rem; }
.rec-desc  { font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.5; }

/* ============================================================
   STAT CARDS
   ============================================================ */
.stat-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.375rem 1.5rem; display: flex; align-items: center; gap: 1rem; transition: var(--transition); box-shadow: var(--shadow-xs); }
.stat-card:hover { box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.stat-icon { width: 48px; height: 48px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.stat-icon.primary { background: var(--color-primary-glow); color: var(--color-primary); }
.stat-icon.success { background: var(--color-success-soft); color: var(--color-success); }
.stat-icon.warning { background: var(--color-warning-soft); color: var(--color-warning); }
.stat-icon.accent  { background: var(--color-accent-soft);  color: var(--color-accent); }
.stat-value { font-size: 1.625rem; font-weight: 800; color: var(--color-text); letter-spacing: -0.03em; line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 500; margin-top: 0.2rem; }

/* ============================================================
   GRIDS & UTILITIES
   ============================================================ */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-start   { display: flex; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.w-full  { width: 100%; }
.hidden  { display: none !important; }
.pointer { cursor: pointer; }
.divider { height: 1px; background: var(--color-border); margin: 1.5rem 0; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .app-main { padding: 1.5rem; }
    .grid-4   { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
    body { overflow-x: hidden; }
    .app-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 200;
        box-shadow: var(--shadow-lg);
    }
    .app-sidebar.open { transform: translateX(0); }
    .app-main { margin-left: 0 !important; padding: 0.875rem !important; width: 100%; overflow-x: hidden; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr !important; gap: 0.875rem; }
    .auth-card { padding: 1.5rem; }
    .profile-card { flex-direction: column; gap: 0.875rem; }
    .app-topbar { flex-direction: column; align-items: flex-start; gap: 0.625rem; padding-bottom: 0.875rem; margin-bottom: 1rem; }
    .mobile-menu-btn { display: flex !important; }
    .table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .table { min-width: 480px; font-size: 0.8rem; }
    .table th, .table td { padding: 0.5rem 0.625rem; }
    .metric-grid { grid-template-columns: repeat(2,1fr) !important; gap: 0.75rem; }
    .eeat-grid { grid-template-columns: repeat(2,1fr) !important; gap: 0.75rem; }
    .identifier-grid { grid-template-columns: repeat(2,1fr) !important; gap: 0.5rem; }
    .kg-grid { grid-template-columns: 1fr !important; }
    .score-value { font-size: 2.25rem; }
    .wikidata-row { flex-direction: column; gap: 0.2rem; }
    .wikidata-key { min-width: unset; }
    .wikidata-value { text-align: left; }
    canvas { max-width: 100% !important; }
    .card { padding: 1rem; }
    .card-header { flex-wrap: wrap; gap: 0.5rem; }
    .pv-stat { font-size: 1.25rem; }
    h1 { font-size: 1.375rem; }
    .profile-av-fallback { width: 56px !important; height: 56px !important; font-size: 1rem !important; }
}

.mobile-menu-btn { display: none; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: var(--radius-md); border: 1.5px solid var(--color-border); background: var(--color-bg-card); cursor: pointer; color: var(--color-text-muted); }

/* Mobile overlay */
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; }
@media (max-width: 768px) {
    .sidebar-overlay.active { display: block; }
}

/* ============================================================
   COMPREHENSIVE MOBILE — everything stacks, nothing overflows
   ============================================================ */
@media (max-width: 768px) {

    /* Prevent horizontal overflow on everything */
    *, *::before, *::after { max-width: 100%; box-sizing: border-box; }
    body, html { overflow-x: hidden; }

    /* App layout */
    .app-wrapper { position: relative; }
    .app-main { margin-left: 0 !important; padding: 0.875rem !important; width: 100%; overflow-x: hidden; }

    /* Sidebar */
    .app-sidebar { width: 280px; transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: var(--shadow-lg); }
    .app-sidebar.open { transform: translateX(0); }
    .sidebar-toggles { flex-wrap: wrap; }

    /* Topbar */
    .app-topbar { flex-direction: column; align-items: flex-start; gap: 0.75rem; padding-bottom: 1rem; margin-bottom: 1.25rem; }
    .app-topbar > div:last-child { display: flex; flex-wrap: wrap; gap: 0.5rem; width: 100%; }

    /* All grids collapse to single column */
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr !important; gap: 0.875rem; }

    /* Cards */
    .card { padding: 1rem; border-radius: var(--radius-md); }
    .card-header { flex-wrap: wrap; gap: 0.5rem; }

    /* Profile card */
    .profile-card { flex-direction: column; align-items: flex-start; gap: 1rem; padding: 1rem; }
    .profile-av-fallback { width: 60px !important; height: 60px !important; font-size: 1.1rem !important; }
    .profile-name { font-size: 1.125rem; }

    /* Score cards */
    .score-card { padding: 1rem; }
    .score-value { font-size: 2rem; }

    /* Metrics grid */
    .metric-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 0.75rem; }
    .metric-value { font-size: 1.5rem; }

    /* Tables — horizontal scroll */
    .table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-sm); }
    .table { min-width: 500px; font-size: 0.8rem; }
    .table th, .table td { padding: 0.5rem 0.625rem; }

    /* EEAT grid */
    .eeat-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 0.75rem; }
    .eeat-value { font-size: 1.75rem; }

    /* Identifier grid */
    .identifier-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 0.5rem; }

    /* KG grid */
    .kg-grid { grid-template-columns: 1fr !important; }

    /* Stat cards */
    .stat-card { padding: 1rem; }
    .stat-value { font-size: 1.375rem; }

    /* Rec/gap items */
    .rec-item { flex-wrap: wrap; }
    .gap-item { flex-wrap: wrap; }

    /* Charts */
    canvas { max-width: 100% !important; }

    /* Source pills */
    .source-pill { font-size: 0.7rem; padding: 0.25rem 0.625rem; }

    /* Buttons */
    .btn { padding: 0.55rem 1rem; font-size: 0.825rem; }
    .btn-full { width: 100%; }

    /* Auth */
    .auth-card { padding: 1.25rem; margin: 0.5rem; }
    .auth-page { padding: 1rem; align-items: flex-start; padding-top: 2rem; }

    /* RVS prominent card */
    .card[style*="gradient"] .flex-between { flex-direction: column; align-items: flex-start; gap: 0.75rem; }

    /* Wikidata rows */
    .wikidata-row { flex-direction: column; gap: 0.25rem; }
    .wikidata-key { min-width: unset; }
    .wikidata-value { text-align: left; }

    /* Similar researchers buttons */
    td[style*="white-space:nowrap"] { white-space: normal !important; }

    /* PV cards */
    .pv-card { padding: 0.875rem; }
    .pv-stat { font-size: 1.25rem; }

    /* Mobile menu button */
    .mobile-menu-btn { display: flex !important; margin-bottom: 0.75rem; }

    /* Admin topbar */
    h1 { font-size: 1.375rem; }
    h2 { font-size: 1.125rem; }

    /* Toggle buttons in sidebar */
    .toggle-btn { font-size: 0.7rem; padding: 0.35rem 0.4rem; }

    /* Form */
    .form-input, .form-select { font-size: 0.9rem; }
    details summary { font-size: 0.875rem; }

    /* Ambiguity entities */
    .ambiguity-entity { flex-wrap: wrap; }
    .ambiguity-entity .btn { margin-left: 0; margin-top: 0.5rem; }

    /* Coauthor items */
    .coauthor-item { gap: 0.625rem; }

    /* Topic tags */
    .topic-tag { font-size: 0.7rem; padding: 0.25rem 0.625rem; }

    /* Locked overlay */
    .locked-cta { font-size: 0.8rem; padding: 0.625rem 1.25rem; }
}

@media (max-width: 480px) {
    .app-main { padding: 0.625rem !important; }
    .metric-grid { grid-template-columns: 1fr 1fr !important; }
    .eeat-grid { grid-template-columns: 1fr 1fr !important; }
    .identifier-grid { grid-template-columns: 1fr 1fr !important; }
    .table { min-width: 420px; }
    .score-value { font-size: 1.75rem; }
    .grid-2, .grid-3, .grid-4 { gap: 0.625rem; }
    .card { padding: 0.875rem; }
}