/* ═══════════════════════════════════════════
   STUDYPEAK — main.css
   Global styles, base components, utilities
═══════════════════════════════════════════ */

/* ── VARIABLES ── */
:root {
    --bg:           #0d0f14;
    --bg-2:         #13161e;
    --bg-3:         #1a1e28;
    --bg-4:         #212636;
    --border:       #252a38;
    --border-2:     #2e3446;
    --text:         #e8eaf0;
    --text-2:       #8b90a0;
    --text-3:       #555b6e;
    --accent:       #4f8ef7;
    --accent-hover: #3a7be8;
    --accent-soft:  rgba(79, 142, 247, 0.12);
    --accent-glow:  rgba(79, 142, 247, 0.25);
    --success:      #34d399;
    --success-soft: rgba(52, 211, 153, 0.12);
    --danger:       #f87171;
    --danger-soft:  rgba(248, 113, 113, 0.12);
    --warning:      #fbbf24;
    --warning-soft: rgba(251, 191, 36, 0.12);
    --radius:       10px;
    --radius-lg:    16px;
    --radius-xl:    20px;
    --shadow:       0 4px 24px rgba(0,0,0,0.4);
    --shadow-sm:    0 2px 8px rgba(0,0,0,0.3);
    --nav-h:        64px;
    --font-display: 'Syne', sans-serif;
    --font-body:    'DM Sans', sans-serif;
    --transition:   0.2s ease;
}

[data-theme="light"] {
    --bg:           #f0f2f8;
    --bg-2:         #ffffff;
    --bg-3:         #eef0f6;
    --bg-4:         #e4e7f0;
    --border:       #dde0eb;
    --border-2:     #cdd0de;
    --text:         #1a1e2e;
    --text-2:       #5c6070;
    --text-3:       #9ca0b0;
    --accent:       #2563eb;
    --accent-hover: #1d55d4;
    --accent-soft:  rgba(37, 99, 235, 0.1);
    --accent-glow:  rgba(37, 99, 235, 0.2);
    --shadow:       0 4px 24px rgba(0,0,0,0.08);
    --shadow-sm:    0 2px 8px rgba(0,0,0,0.06);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font-body); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
input, textarea, select { font-family: var(--font-body); }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 20px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ─────────────────────────────────────────
   NAVBAR
───────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 0 24px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text);
    flex-shrink: 0;
    letter-spacing: -0.02em;
    transition: opacity var(--transition);
}

.nav-logo-img {
    height: 32px;
    width: 32px;
    object-fit: contain;
    border-radius: 6px;
    filter: brightness(1.05);
}

.nav-logo:hover { opacity: 0.85; }
.logo-icon { font-size: 1.3rem; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 11px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-2);
    transition: all var(--transition);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text);
    background: var(--bg-3);
}

.nav-link.active {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav-link i { font-size: 0.8rem; flex-shrink: 0; }

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Theme toggle */
.theme-toggle {
    width: 36px; height: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-3);
    color: var(--text-2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    font-size: 0.85rem;
}

.theme-toggle:hover {
    color: var(--text);
    border-color: var(--accent);
    background: var(--accent-soft);
}

/* Avatar / dropdown button */
.nav-dropdown { position: relative; }

.nav-avatar-btn {
    width: 36px; height: 36px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-3);
    color: var(--text-2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    font-size: 1rem;
}

.nav-avatar-btn:hover {
    color: var(--text);
    border-color: var(--accent);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 6px;
    min-width: 185px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all var(--transition);
    z-index: 110;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-2);
    transition: all var(--transition);
}

.dropdown-item:hover {
    background: var(--bg-3);
    color: var(--text);
}

.dropdown-item i { width: 16px; font-size: 0.8rem; }

.dropdown-danger:hover {
    color: var(--danger);
    background: var(--danger-soft);
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 6px;
}

/* ─────────────────────────────────────────
   MAIN CONTENT
───────────────────────────────────────── */
.main-content {
    padding-top: var(--nav-h);
    min-height: 100vh;
}

.main-content.no-nav { padding-top: 0; }

/* ─────────────────────────────────────────
   TOAST MESSAGES
───────────────────────────────────────── */
.messages-container {
    position: fixed;
    top: calc(var(--nav-h) + 12px);
    right: 16px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 380px;
    pointer-events: none;
}

.message {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--bg-2);
    box-shadow: var(--shadow);
    animation: slideInMsg 0.25s ease;
    pointer-events: all;
}

@keyframes slideInMsg {
    from { opacity: 0; transform: translateX(16px); }
    to   { opacity: 1; transform: translateX(0); }
}

.message-success { border-color: var(--success); color: var(--success); }
.message-error   { border-color: var(--danger);  color: var(--danger);  }
.message-warning { border-color: var(--warning); color: var(--warning); }
.message-info    { border-color: var(--accent);  color: var(--accent);  }

.message-close {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    opacity: 0.6;
    padding: 0;
    font-size: 0.8rem;
    line-height: 1;
    flex-shrink: 0;
}

.message-close:hover { opacity: 1; }

/* ─────────────────────────────────────────
   CONTAINERS
───────────────────────────────────────── */
.container    { max-width: 1280px; margin: 0 auto; padding: 32px 24px; }
.container-sm { max-width: 560px;  margin: 0 auto; padding: 32px 24px; }
.container-md { max-width: 860px;  margin: 0 auto; padding: 32px 24px; }

/* ─────────────────────────────────────────
   PAGE HEADER
───────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    gap: 16px;
    flex-wrap: wrap;
}

.page-title {
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.page-subtitle {
    font-size: 0.9rem;
    color: var(--text-2);
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

/* ─────────────────────────────────────────
   CARDS
───────────────────────────────────────── */
.card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: border-color var(--transition);
}

.card-sm { padding: 16px; }
.card-lg { padding: 32px; }

.card-title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-title i { color: var(--text-3); font-size: 0.85rem; }

/* Danger zone */
.danger-zone { border-color: rgba(248, 113, 113, 0.2); }

/* ─────────────────────────────────────────
   GRID
───────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ─────────────────────────────────────────
   BUTTONS
───────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1;
    text-decoration: none;
    user-select: none;
}

.btn i { font-size: 0.85em; }

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

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-3);
    color: var(--text-2);
    border-color: var(--border);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

.btn-danger {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: rgba(248,113,113,0.3);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

.btn-success {
    background: var(--success-soft);
    color: var(--success);
    border-color: rgba(52,211,153,0.3);
}

.btn-success:hover {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}

.btn-ghost {
    background: transparent;
    color: var(--text-2);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--bg-3);
    color: var(--text);
    border-color: var(--border);
}

.btn-warning {
    background: var(--warning-soft);
    color: var(--warning);
    border-color: rgba(251,191,36,0.3);
}

.btn-warning:hover {
    background: var(--warning);
    color: #fff;
    border-color: var(--warning);
}

.btn-sm    { padding: 6px 12px; font-size: 0.8rem; }
.btn-xs    { padding: 4px 9px;  font-size: 0.75rem; }
.btn-lg    { padding: 12px 24px; font-size: 0.95rem; }
.btn-block { width: 100%; justify-content: center; }

.btn:disabled,
.btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
    pointer-events: none;
}

/* ─────────────────────────────────────────
   FORMS
───────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-2);
    margin-bottom: 7px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-3); }

.form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238b90a0' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.6;
}

.form-checkbox {
    width: 16px; height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

.form-file {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-2);
    font-size: 0.875rem;
    cursor: pointer;
    transition: border-color var(--transition);
}

.form-file:hover { border-color: var(--accent); }

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.form-check-label {
    font-size: 0.875rem;
    color: var(--text-2);
    cursor: pointer;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-3);
    margin-top: 6px;
    line-height: 1.5;
}

.form-hint-link {
    color: var(--accent);
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 6px;
    transition: opacity var(--transition);
}

.form-hint-link:hover { opacity: 0.8; }

.form-required { color: var(--danger); margin-left: 2px; }

.form-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* Input with icon */
.input-icon-wrap {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-3);
    font-size: 0.85rem;
    pointer-events: none;
}

.input-with-icon { padding-left: 40px; }

.input-with-icon-right { padding-right: 40px; }

.input-icon-right {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-3);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 4px;
    transition: color var(--transition);
}

.input-icon-right:hover { color: var(--text-2); }

/* File drop zone */
.file-drop-zone {
    border: 2px dashed var(--border-2);
    border-radius: var(--radius);
    background: var(--bg-3);
    cursor: pointer;
    transition: all var(--transition);
    overflow: hidden;
    position: relative;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.file-drop-zone.has-file { border-style: solid; border-color: var(--success); }

.file-drop-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 24px;
    gap: 8px;
    text-align: center;
}

.file-drop-icon {
    font-size: 2rem;
    color: var(--text-3);
    margin-bottom: 4px;
}

.file-drop-title {
    font-size: 0.9rem;
    color: var(--text-2);
    font-weight: 500;
}

.file-drop-sub { color: var(--text-3); }

.file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.file-name-preview {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    color: var(--text-2);
}

/* ─────────────────────────────────────────
   TABLES
───────────────────────────────────────── */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead { background: var(--bg-3); }

th {
    padding: 11px 16px;
    text-align: left;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    color: var(--text);
    vertical-align: middle;
}

tr:hover td { background: var(--bg-3); }

.table-link {
    color: var(--accent);
    font-weight: 500;
    transition: opacity var(--transition);
}

.table-link:hover { opacity: 0.8; text-decoration: underline; }

/* ─────────────────────────────────────────
   BADGES
───────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.badge i { font-size: 0.7em; }

.badge-blue   { background: var(--accent-soft);   color: var(--accent);  }
.badge-green  { background: var(--success-soft);  color: var(--success); }
.badge-red    { background: var(--danger-soft);   color: var(--danger);  }
.badge-yellow { background: var(--warning-soft);  color: var(--warning); }
.badge-gray   { background: var(--bg-4);          color: var(--text-2);  }

/* ─────────────────────────────────────────
   EMPTY STATE
───────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 56px 24px;
}

.empty-state i,
.empty-state-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
    display: block;
    color: var(--text-3);
    opacity: 0.6;
}

.empty-state p,
.empty-state-title {
    font-size: 0.9rem;
    margin-bottom: 16px;
    color: var(--text-2);
}

/* ─────────────────────────────────────────
   STAT CARDS
───────────────────────────────────────── */
.stat-card-inner {
    display: flex;
    align-items: center;
    gap: 14px;
}

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

.stat-icon-blue   { background: var(--accent-soft);   color: var(--accent);  }
.stat-icon-green  { background: var(--success-soft);  color: var(--success); }
.stat-icon-red    { background: var(--danger-soft);   color: var(--danger);  }
.stat-icon-yellow { background: var(--warning-soft);  color: var(--warning); }
.stat-icon-accent { background: var(--accent-soft);   color: var(--accent);  }

.stat-value {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-2);
    margin-top: 4px;
}

/* ─────────────────────────────────────────
   PAGE WRAPPER (materials / form pages)
───────────────────────────────────────── */
.page-wrapper {
    max-width: 1280px;
    margin: 0 auto;
    padding: 32px 24px;
}

.page-header-left  { display: flex; align-items: center; gap: 16px; }
.page-header-right { display: flex; align-items: center; gap: 8px; }
.page-header-sub   { font-size: 0.8rem; color: var(--text-3); margin-bottom: 2px; }

.breadcrumb-link {
    color: var(--text-2);
    transition: color var(--transition);
}
.breadcrumb-link:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--text-3); margin: 0 4px; font-size: 0.75rem; }

.btn-back {
    width: 36px; height: 36px;
    border-radius: var(--radius);
    background: var(--bg-3);
    border: 1px solid var(--border);
    color: var(--text-2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    font-size: 0.85rem;
    flex-shrink: 0;
}

.btn-back:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

/* ─────────────────────────────────────────
   SECTION HEADER
───────────────────────────────────────── */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ─────────────────────────────────────────
   FORM PAGE LAYOUT (2-col form + side)
───────────────────────────────────────── */
.form-page-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 24px;
    align-items: start;
}

.form-card { padding: 28px; }

.form-side { display: flex; flex-direction: column; gap: 16px; }

.side-card { padding: 18px; }

.side-card-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.side-card-value {
    font-size: 0.9rem;
    color: var(--text);
    font-weight: 500;
}

.side-card-link {
    font-size: 0.875rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: opacity var(--transition);
}

.side-card-link:hover { opacity: 0.8; }

.side-tips-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.side-tips-list li {
    font-size: 0.8rem;
    color: var(--text-2);
    padding-left: 14px;
    position: relative;
    line-height: 1.5;
}

.side-tips-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.side-card-danger { border-color: rgba(248,113,113,0.2); }

.side-info-list { display: flex; flex-direction: column; gap: 8px; }

.side-info-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.side-info-row:last-child { border-bottom: none; padding-bottom: 0; }

/* ─────────────────────────────────────────
   AVATAR UPLOAD
───────────────────────────────────────── */
.avatar-upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius);
    background: var(--bg-3);
    border: 1px solid var(--border);
    color: var(--text-2);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 12px;
}

.avatar-upload-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

.avatar-upload-hint {
    font-size: 0.75rem;
    color: var(--text-3);
    margin-top: 6px;
}

/* Cover image preview */
.cover-preview-wrap { position: relative; }
.cover-preview-img {
    width: 100%;
    border-radius: var(--radius);
    object-fit: cover;
    max-height: 200px;
}

.cover-preview-remove {
    position: absolute;
    top: 8px; right: 8px;
    width: 28px; height: 28px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition);
}

.cover-preview-remove:hover {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: var(--danger);
}

/* Current file preview */
.current-file-preview,
.current-file-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 8px;
}

.current-file-icon {
    width: 40px; height: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.current-image-wrap img {
    max-height: 160px;
    border-radius: var(--radius);
    object-fit: cover;
}

/* ─────────────────────────────────────────
   TYPE SELECTOR (materials)
───────────────────────────────────────── */
.type-selector {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.type-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 18px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-3);
    cursor: pointer;
    transition: all var(--transition);
    min-width: 80px;
    font-size: 0.78rem;
    color: var(--text-2);
    font-weight: 500;
    user-select: none;
}

.type-option:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.type-option.selected {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.type-option-icon {
    width: 36px; height: 36px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

/* Material type colors */
.type-icon-pdf    .type-option-icon,
.type-icon-pdf    { color: var(--danger); }
.type-icon-link   .type-option-icon,
.type-icon-link   { color: var(--accent); }
.type-icon-text   .type-option-icon,
.type-icon-text   { color: var(--text-2); }
.type-icon-image  .type-option-icon,
.type-icon-image  { color: var(--success); }
.type-icon-video  .type-option-icon,
.type-icon-video  { color: var(--warning); }

.type-badge-current {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-3);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-2);
}

/* ─────────────────────────────────────────
   MESSAGES INLINE (form pages)
───────────────────────────────────────── */
.messages-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    border: 1px solid var(--border);
}

.alert-success { border-color: var(--success); color: var(--success); background: var(--success-soft); }
.alert-error   { border-color: var(--danger);  color: var(--danger);  background: var(--danger-soft);  }
.alert-warning { border-color: var(--warning); color: var(--warning); background: var(--warning-soft); }

/* ─────────────────────────────────────────
   UTILITIES
───────────────────────────────────────── */
.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-col      { flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }
.items-center  { align-items: center; }
.items-start   { align-items: flex-start; }
.d-inline      { display: inline; }

.gap-4  { gap: 4px; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }

.mt-8   { margin-top: 8px; }
.mt-12  { margin-top: 12px; }
.mt-16  { margin-top: 16px; }
.mt-24  { margin-top: 24px; }
.mb-8   { margin-bottom: 8px; }
.mb-12  { margin-bottom: 12px; }
.mb-16  { margin-bottom: 16px; }
.mb-24  { margin-bottom: 24px; }
.mb-32  { margin-bottom: 32px; }

.text-sm      { font-size: 0.8rem !important; }
.text-muted   { color: var(--text-2) !important; }
.text-accent  { color: var(--accent) !important; }
.text-danger  { color: var(--danger) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }

.font-display { font-family: var(--font-display); }
.font-bold    { font-weight: 700; }

.w-full   { width: 100%; }
.h-full   { height: 100%; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Spacing shorthands for inline use */
.mb-8   { margin-bottom: 8px; }
.mb-16  { margin-bottom: 16px; }
.mt-8   { margin-top: 8px; }
.mt-16  { margin-top: 16px; }

/* ─────────────────────────────────────────
   AUTH PAGES — reusable auth.css base
───────────────────────────────────────── */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(79,142,247,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(52,211,153,0.04) 0%, transparent 50%),
        var(--bg);
}

.auth-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px 36px;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow);
}

.auth-card-wide { max-width: 520px; }

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 28px;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text);
    letter-spacing: -0.02em;
}

.auth-logo-icon { font-size: 1.5rem; }

.auth-header { text-align: center; margin-bottom: 28px; }

.auth-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.auth-subtitle {
    font-size: 0.9rem;
    color: var(--text-2);
    margin-top: 6px;
    line-height: 1.5;
}

.auth-form { display: flex; flex-direction: column; gap: 0; }

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    font-size: 0.8rem;
    color: var(--text-3);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-link {
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 500;
    transition: opacity var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.auth-link:hover { opacity: 0.8; }

.auth-footer {
    text-align: center;
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.auth-verify-icon {
    width: 64px; height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}

.auth-icon-warning {
    background: var(--warning-soft);
    color: var(--warning);
}

.auth-icon-success {
    background: var(--success-soft);
    color: var(--success);
}

.auth-hint {
    font-size: 0.8rem;
    margin-top: 6px;
    min-height: 18px;
}

.auth-hint-success { color: var(--success); }
.auth-hint-error   { color: var(--danger);  }

/* Role selector */
.role-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.role-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}

.role-option:hover,
.role-option.active {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.role-icon {
    width: 36px; height: 36px;
    border-radius: var(--radius);
    background: var(--bg-3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-2);
    flex-shrink: 0;
}

.role-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
}

.role-check {
    margin-left: auto;
    width: 18px; height: 18px;
    border-radius: 50%;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    color: transparent;
    transition: all var(--transition);
}

.role-option.active .role-check {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Password strength */
.password-strength { margin-top: 8px; }

.strength-track {
    height: 4px;
    background: var(--bg-4);
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 4px;
}

.strength-fill {
    height: 100%;
    width: 0%;
    border-radius: 20px;
    transition: width 0.3s ease, background 0.3s ease;
}

.strength-label {
    font-size: 0.75rem;
    font-weight: 600;
}

/* OTP inputs */
.otp-inputs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 8px;
}

.otp-input {
    width: 52px; height: 56px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-display);
    background: var(--bg-3);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    outline: none;
    transition: all var(--transition);
}

.otp-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.otp-input-filled { border-color: var(--accent); }

.otp-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-2);
    margin: 16px 0;
}

.otp-timer-count {
    font-weight: 700;
    font-family: var(--font-display);
    color: var(--accent);
    min-width: 48px;
}
.nav-notif-btn {
    position: relative;
    width: 38px; height: 38px;
    border-radius: 10px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    color: var(--text-2);
    display: flex; align-items: center; justify-content: center;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.2s;
}
.nav-notif-btn:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
}
.nav-notif-badge {
    position: absolute;
    top: -4px; right: -4px;
    background: #ef4444;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    min-width: 16px; height: 16px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    padding: 0 3px;
    border: 2px solid var(--bg);
}

.notif-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}
.notif-row:last-child { border-bottom: none; }
.notif-unread { background: var(--accent-soft); border-radius: 10px; padding: 14px; }
.notif-icon {
    width: 42px; height: 42px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; flex-shrink: 0;
}
.notif-body { flex: 1; min-width: 0; }
.notif-text { font-size: 0.875rem; color: var(--text); margin: 0 0 3px; }
.notif-time { font-size: 0.75rem; color: var(--text-3); margin: 0; }
.notif-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* ═══════════════════════════════════════════════════
   FRIENDS DROPDOWN (Navbar)
   Добавь в конец main.css
═══════════════════════════════════════════════════ */

.nav-friends-wrap {
    position: relative;
}

/* Dropdown panel */
.friends-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 320px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    z-index: 200;
    overflow: hidden;

    /* Скрыт по умолчанию */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.friends-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Header */
.friends-dropdown-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 10px;
    border-bottom: 1px solid var(--border);
}

.friends-dropdown-title {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
}

.friends-dropdown-link {
    font-size: 0.78rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: opacity 0.15s;
}

.friends-dropdown-link:hover { opacity: 0.75; }

/* Search input */
.friends-search-wrap {
    position: relative;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

.friends-search-icon {
    position: absolute;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-3);
    font-size: 0.8rem;
    pointer-events: none;
}

.friends-search-input {
    width: 100%;
    padding: 8px 12px 8px 34px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.875rem;
    font-family: var(--font-body);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.friends-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.friends-search-input::placeholder { color: var(--text-3); }

/* Results list */
.friends-search-results {
    max-height: 280px;
    overflow-y: auto;
    padding: 6px 0;
}

.friends-search-results::-webkit-scrollbar { width: 3px; }
.friends-search-results::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* Hint (empty / loading) */
.friends-search-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 28px 16px;
    color: var(--text-3);
    font-size: 0.82rem;
    text-align: center;
}

.friends-search-hint i { font-size: 1.4rem; opacity: 0.5; }
.friends-search-hint p { margin: 0; }

/* Each result row */
.friends-result-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    transition: background 0.15s;
}

.friends-result-item:hover { background: var(--bg-3); }

/* Avatar */
.friends-result-av {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-soft);
    border: 1px solid var(--border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    overflow: hidden;
}

.friends-result-av img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Info */
.friends-result-info { flex: 1; min-width: 0; }

.friends-result-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.friends-result-role {
    font-size: 0.72rem;
    color: var(--text-3);
    text-transform: capitalize;
    margin: 0;
}

/* Add button */
.friends-add-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    transition: all 0.15s;
    white-space: nowrap;
}

.friends-add-btn:hover:not(:disabled) {
    background: var(--accent);
    color: #fff;
}

.friends-add-btn--pending {
    border-color: var(--border);
    background: var(--bg-3);
    color: var(--text-3);
    cursor: default;
}

.friends-add-btn--done {
    border-color: rgba(52,211,153,0.3);
    background: rgba(52,211,153,0.1);
    color: #34d399;
    cursor: default;
}

/* ─────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────── */
@media (max-width: 1024px) {
    .form-page-layout { grid-template-columns: 1fr; }
    .form-side { display: grid; grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links span { display: none; }
    .nav-link { padding: 8px; }
    .nav-link i { font-size: 0.95rem; }

    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .container,
    .container-sm,
    .container-md,
    .page-wrapper { padding: 20px 16px; }

    .page-title { font-size: 1.4rem; }

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

    .messages-container { max-width: calc(100vw - 32px); }

    .auth-card { padding: 28px 20px; }

    .otp-input { width: 44px; height: 50px; font-size: 1.1rem; }
}

@media (max-width: 480px) {
    .role-selector { grid-template-columns: 1fr; }
    .otp-inputs { gap: 6px; }
    .otp-input { width: 40px; height: 46px; font-size: 1rem; }
}