/* ==========================================
   APP CHROME — layout, sidebar, tabs, forms, buttons, toasts.
   Complements style.css (design tokens / cards / badges / hero, ported as-is
   from the original Streamlit app) with the UI chrome Streamlit used to
   provide for free.
   ========================================== */

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    transition: background-color 0.15s ease, color 0.15s ease;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); }

a, a:visited { text-decoration: none; }

.app-shell {
    display: flex;
    min-height: 100vh;
    position: relative;
}

.app-sidebar {
    width: 260px;
    flex-shrink: 0;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: var(--space-md);
    position: relative;
    overflow: hidden;
    transition: width 0.18s ease, padding 0.18s ease, border-color 0.18s ease;
}

.sidebar-title {
    font-size: 1.1rem;
    margin-top: 0;
}

.sidebar-caption {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.app-main {
    flex: 1;
    min-width: 0;
    padding: var(--space-lg);
    width: 100%;
}

/* --- Sidebar collapse/expand --- */
.sidebar-collapse-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 1.8rem;
    height: 1.8rem;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sidebar-collapse-btn:hover { color: var(--accent-color); border-color: var(--accent-color); }

.sidebar-expand-btn {
    display: none;
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    width: 1.8rem;
    height: 1.8rem;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    align-items: center;
    justify-content: center;
    z-index: 10;
}
.sidebar-expand-btn:hover { color: var(--accent-color); border-color: var(--accent-color); }

.app-shell.sidebar-collapsed .app-sidebar {
    width: 0;
    padding-left: 0;
    padding-right: 0;
    border-right-color: transparent;
}
.app-shell.sidebar-collapsed .app-sidebar > * { opacity: 0; pointer-events: none; }
.app-shell.sidebar-collapsed .sidebar-expand-btn { display: flex; }

@media screen and (max-width: 900px) {
    .app-shell { flex-direction: column; }
    .app-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
    .app-shell.sidebar-collapsed .app-sidebar { width: 100%; height: 0; padding-top: 0; padding-bottom: 0; border-bottom-color: transparent; }
    .app-main { padding: var(--space-md); }
}

/* --- Night mode toggle switch --- */
.night-toggle {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    user-select: none;
    font-weight: 600;
}
.night-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.night-toggle-track {
    width: 42px;
    height: 24px;
    border-radius: var(--radius-pill);
    background: var(--border-color);
    position: relative;
    transition: background 0.15s ease;
    flex-shrink: 0;
}
.night-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #fff;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease;
}
.night-toggle input:checked + .night-toggle-track { background: var(--accent-color); }
.night-toggle input:checked + .night-toggle-track .night-toggle-thumb { transform: translateX(18px); }

/* ==========================================
   TABS
   ========================================== */
.tabs-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--space-md);
}

.tab-btn {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.85rem 1.1rem;
    cursor: pointer;
}

.tab-btn:hover { color: var(--accent-color); }

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.tab-loading-placeholder {
    color: var(--text-muted);
    padding: var(--space-md) 0;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:hover:not(:disabled) {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
    background-color: var(--primary-color);
    color: #fff !important;
    border-color: var(--primary-color);
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff !important;
}

.btn-danger {
    color: #B91C1C;
    border-color: rgba(185, 28, 28, 0.35);
}
.btn-danger:hover:not(:disabled) {
    background-color: #FEE2E2;
    color: #B91C1C;
    border-color: #B91C1C;
}
body.mode-dark .btn-danger:hover:not(:disabled) { background-color: #450A0A; }

.btn-active {
    background-color: var(--accent-color);
    color: #fff !important;
    border-color: var(--accent-color);
}

.btn-block { display: block; width: 100%; text-align: center; }

.btn-icon { padding: 0.4rem 0.7rem; }

.btn-row {
    display: flex;
    gap: 0.6rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.mode-switch {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

/* ==========================================
   FORMS
   ========================================== */
.field-group {
    margin-bottom: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.field-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

input[type="text"], input[type="password"], input[type="number"], input[type="email"],
input[type="file"], select, textarea {
    font-family: var(--font-body);
    font-size: 0.92rem;
    padding: 0.5rem 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    width: 100%;
}

textarea { resize: vertical; }

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
    font-size: 0.92rem;
}
.checkbox-row input { width: auto; }

/* ==========================================
   ALERTS / TOASTS
   ========================================== */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    margin: 0.5rem 0;
}
.alert-info { background: #E0F2FE; border-color: #BAE6FD; color: #0369A1; }
.alert-warning { background: #FEF3C7; border-color: #FDE68A; color: #92400E; }
.alert-error { background: #FEE2E2; border-color: #FECACA; color: #B91C1C; }

body.mode-dark .alert-info { background: #0C4A6E; border-color: #0369A1; color: #7DD3FC; }
body.mode-dark .alert-warning { background: #78350F; border-color: #B45309; color: #FDE68A; }
body.mode-dark .alert-error { background: #450A0A; border-color: #B91C1C; color: #FCA5A5; }

#toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: 0.7rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: toast-in 0.2s ease, toast-out 0.3s ease 2.7s forwards;
}

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

/* ==========================================
   LOADING OVERLAY (htmx requests in flight)
   ========================================== */
.htmx-loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    z-index: 9998;
    align-items: center;
    justify-content: center;
}
.htmx-loading-overlay.visible { display: flex; }
.htmx-loading-spinner {
    font-size: 4rem;
    animation: gear-spin 1.1s linear infinite;
}
@keyframes gear-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==========================================
   LOGIN
   ========================================== */
.login-wrap {
    display: flex;
    justify-content: center;
    padding-top: 3rem;
}
.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   ADMIN HEADER
   ========================================== */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.admin-header h1 { margin: 0; }

/* ==========================================
   SECTION HEADINGS (ported from style.css's
   [data-testid=stMarkdownContainer] h3 rule)
   ========================================== */
.section-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    padding-bottom: 0.6rem;
    margin-bottom: 1.1rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}
.section-heading::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 44px;
    height: 3px;
    background: var(--accent-color);
    border-radius: var(--radius-pill);
}

/* ==========================================
   TWO-COLUMN SPLIT LAYOUT (Experience/Qualifications, PhD/MTech)
   ========================================== */
.split-columns {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-md);
}
.split-sep { display: flex; justify-content: center; }

@media screen and (max-width: 768px) {
    .split-columns { grid-template-columns: 1fr; }
    .split-sep { display: none; }
}

/* ==========================================
   PUBLICATIONS SEARCH/SORT/PAGINATION CONTROLS
   ========================================== */
.pub-controls-row {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}
.field-grow { flex: 1; min-width: 220px; }
.pub-caption { color: var(--text-muted); font-size: 0.85rem; }
.pub-controls-row-nav { justify-content: space-between; }
.pager { display: flex; align-items: center; gap: 0.6rem; }
.pager-label { font-weight: 700; }

.muted-caption { color: var(--text-muted); font-size: 0.9rem; }

/* ==========================================
   PHOTO CROPPER MOUNT (ported from utils/circle_cropper.py's component CSS)
   ========================================== */
#photo-cropper-mount { margin: 0.75rem 0; }

.cc-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}
.cc-circle {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    background: rgba(148, 163, 184, 0.2);
    border: 3px solid var(--accent-color);
    box-shadow: var(--shadow-lg);
    cursor: grab;
    touch-action: none;
    user-select: none;
}
.cc-circle:active { cursor: grabbing; }
.cc-circle img {
    position: absolute;
    top: 50%;
    left: 50%;
    max-width: none;
    pointer-events: none;
}
.cc-controls {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 240px;
}
.cc-controls input[type="range"] { flex: 1; width: auto; }
.cc-controls button {
    border: 1px solid var(--border-color);
    background: transparent;
    border-radius: 999px;
    width: 1.9rem;
    height: 1.9rem;
    cursor: pointer;
    font-size: 0.95rem;
}
.cc-apply-btn {
    padding: 0.45rem 1.1rem;
    border-radius: 999px;
    border: none;
    background: var(--accent-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
}
.cc-apply-btn:hover { filter: brightness(1.08); }

/* ==========================================
   DARK MODE — high-contrast overrides for chrome not covered by CSS vars
   ========================================== */
body.mode-dark .app-sidebar,
body.mode-dark .login-card {
    background-color: #1E293B;
    border-color: #334155;
}

body.mode-dark input[type="text"], body.mode-dark input[type="password"],
body.mode-dark input[type="number"], body.mode-dark input[type="email"],
body.mode-dark select, body.mode-dark textarea, body.mode-dark input[type="file"] {
    background-color: #1E293B;
    color: #F8FAFC;
    border-color: #334155;
}

body.mode-dark .btn {
    background-color: #334155;
    color: #F8FAFC;
    border-color: #475569;
}
body.mode-dark .btn:hover:not(:disabled) {
    background-color: #2563EB;
    border-color: #38BDF8;
    color: #FFFFFF;
}
body.mode-dark .btn-primary {
    background-color: #2563EB;
    border-color: #2563EB;
}

/* Hero card text — explicit hardcoded colors (not just var(--text-color)),
   matching how the original app's night-mode CSS block hardcoded every
   dark-mode color rather than relying on custom-property inheritance. */
body.mode-dark .profile-hero-banner h1,
body.mode-dark .profile-hero-banner h3,
body.mode-dark .profile-hero-banner h4,
body.mode-dark .profile-hero-banner p,
body.mode-dark .profile-hero-banner strong,
body.mode-dark .profile-hero-banner span:not(.badge) {
    color: #F8FAFC !important;
}
body.mode-dark .profile-hero-banner .hero-bio-col > p:nth-of-type(1) {
    color: #94A3B8 !important; /* department/institution line stays muted-italic */
}