/* PalletVision Design System */
:root {
    --pv-primary: #0f4c81;
    --pv-primary-dark: #0a3559;
    --pv-primary-light: #e8f1f8;
    --pv-accent: #1a7f5a;
    --pv-bg: #f0f4f8;
    --pv-surface: #ffffff;
    --pv-text: #1e293b;
    --pv-text-muted: #64748b;
    --pv-border: #e2e8f0;
    --pv-radius: 12px;
    --pv-radius-sm: 8px;
    --pv-shadow: 0 4px 24px rgba(15, 76, 129, 0.08);
    --pv-shadow-lg: 0 12px 40px rgba(15, 76, 129, 0.12);
    --pv-font: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}

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

body {
    margin: 0;
    font-family: var(--pv-font);
    color: var(--pv-text);
    background: var(--pv-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--pv-primary); }
a:hover { color: var(--pv-primary-dark); }

/* Layout */
.pv-layout { min-height: 100vh; display: flex; flex-direction: column; }
.pv-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.875rem 1.5rem; background: var(--pv-surface);
    border-bottom: 1px solid var(--pv-border);
    position: sticky; top: 0; z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.pv-brand { display: flex; align-items: center; gap: 0.625rem; }
.pv-brand a {
    font-weight: 700; font-size: 1.2rem; text-decoration: none;
    color: var(--pv-primary); letter-spacing: -0.02em;
}

.pv-brand img {
    height: 56px;
    width: auto;
    display: block;
}
.pv-nav { display: flex; gap: 0.25rem; flex-wrap: wrap; align-items: center; }
.pv-nav a {
    text-decoration: none; color: var(--pv-text-muted);
    padding: 0.5rem 0.875rem; border-radius: var(--pv-radius-sm);
    font-size: 0.9375rem; font-weight: 500; transition: all 0.15s;
}
.pv-nav a:hover { color: var(--pv-primary); background: var(--pv-primary-light); }
.pv-main { flex: 1; padding: 2rem 1.5rem; max-width: 1140px; width: 100%; margin: 0 auto; }
.pv-footer {
    padding: 1.25rem 1.5rem; text-align: center;
    color: var(--pv-text-muted); font-size: 0.875rem;
    border-top: 1px solid var(--pv-border); background: var(--pv-surface);
}

/* Auth layout */
.pv-auth-layout {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, #e8f1f8 0%, #f0f4f8 50%, #e8f4ef 100%);
}
.pv-auth-card {
    width: 100%; max-width: 440px; background: var(--pv-surface);
    border-radius: var(--pv-radius); padding: 2rem;
    box-shadow: var(--pv-shadow-lg); border: 1px solid var(--pv-border);
}
.pv-auth-logo { text-align: center; margin-bottom: 1.5rem; }
.pv-auth-logo img { height: 56px; }
.pv-auth-title { text-align: center; margin: 0 0 0.25rem; font-size: 1.5rem; font-weight: 700; }
.pv-auth-subtitle { text-align: center; color: var(--pv-text-muted); margin: 0 0 1.5rem; font-size: 0.9375rem; }

/* Typography */
.pv-page-title { font-size: 1.75rem; font-weight: 700; margin: 0 0 0.5rem; letter-spacing: -0.02em; }
.pv-page-subtitle { color: var(--pv-text-muted); margin: 0 0 1.5rem; }
.pv-section-title { font-size: 1.125rem; font-weight: 600; margin: 0 0 0.75rem; }

/* Cards */
.pv-card {
    background: var(--pv-surface); border: 1px solid var(--pv-border);
    border-radius: var(--pv-radius); padding: 1.5rem;
    margin-bottom: 1rem; box-shadow: var(--pv-shadow);
}
.pv-card-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem; margin-bottom: 1rem;
}
.pv-card-highlight {
    border-color: var(--pv-primary); background: linear-gradient(180deg, #fff 0%, var(--pv-primary-light) 100%);
}

/* Hero */
.pv-hero {
    text-align: center; padding: 2.5rem 1rem; margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--pv-primary) 0%, var(--pv-primary-dark) 100%);
    border-radius: var(--pv-radius); color: #fff;
    box-shadow: var(--pv-shadow-lg);
}
.pv-hero h1 { font-size: 2.25rem; margin: 0 0 0.75rem; font-weight: 800; letter-spacing: -0.03em; }
.pv-hero p { font-size: 1.125rem; opacity: 0.92; max-width: 560px; margin: 0 auto 1.5rem; }
.pv-hero .pv-btn { background: #fff; color: var(--pv-primary); font-weight: 600; }
.pv-hero .pv-btn:hover { background: var(--pv-primary-light); }

/* Buttons */
.pv-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.625rem 1.25rem; background: var(--pv-primary); color: #fff;
    border: none; border-radius: var(--pv-radius-sm); cursor: pointer;
    text-decoration: none; font-size: 0.9375rem; font-weight: 600;
    transition: background 0.15s, transform 0.1s; font-family: inherit;
}
.pv-btn:hover { background: var(--pv-primary-dark); color: #fff; }
.pv-btn:active { transform: scale(0.98); }
.pv-btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }
.pv-btn-secondary { background: var(--pv-text-muted); }
.pv-btn-secondary:hover { background: #475569; color: #fff; }
.pv-btn-outline {
    background: transparent; color: var(--pv-primary);
    border: 1.5px solid var(--pv-primary);
}
.pv-btn-outline:hover { background: var(--pv-primary-light); }
.pv-btn-sm { padding: 0.4rem 0.875rem; font-size: 0.875rem; }
.pv-btn-block { width: 100%; }
.pv-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin: 1rem 0; }

/* Forms */
.form-group { margin-bottom: 1.125rem; }
.form-group label {
    display: block; margin-bottom: 0.375rem;
    font-weight: 600; font-size: 0.875rem; color: var(--pv-text);
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--pv-border); border-radius: var(--pv-radius-sm);
    font-size: 0.9375rem; font-family: inherit; background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus, .form-group select:focus {
    outline: none; border-color: var(--pv-primary);
    box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.15);
}
.pv-code {
    display: inline-block; padding: 0.5rem 1rem; background: var(--pv-primary-light);
    border: 1px dashed var(--pv-primary); border-radius: var(--pv-radius-sm);
    font-family: "Cascadia Code", Consolas, monospace; font-size: 1.125rem;
    font-weight: 700; letter-spacing: 0.15em; color: var(--pv-primary);
}

/* Alerts */
.pv-alert-error {
    color: #991b1b; background: #fef2f2; border: 1px solid #fecaca;
    padding: 0.875rem 1rem; border-radius: var(--pv-radius-sm); margin-bottom: 1rem;
}
.pv-alert-success {
    color: #166534; background: #f0fdf4; border: 1px solid #bbf7d0;
    padding: 0.875rem 1rem; border-radius: var(--pv-radius-sm); margin-bottom: 1rem;
}
.pv-alert-info {
    color: #1e40af; background: #eff6ff; border: 1px solid #bfdbfe;
    padding: 0.875rem 1rem; border-radius: var(--pv-radius-sm); margin-bottom: 1rem;
}
.pv-hint { color: var(--pv-text-muted); font-size: 0.875rem; }

/* OAuth */
.pv-oauth-divider {
    display: flex; align-items: center; gap: 1rem;
    margin: 1.25rem 0; color: var(--pv-text-muted); font-size: 0.8125rem;
}
.pv-oauth-divider::before, .pv-oauth-divider::after {
    content: ""; flex: 1; height: 1px; background: var(--pv-border);
}
.pv-oauth-buttons { display: flex; flex-direction: column; gap: 0.625rem; }
.pv-oauth-btn {
    display: flex; align-items: center; justify-content: center; gap: 0.625rem;
    padding: 0.625rem 1rem; border-radius: var(--pv-radius-sm);
    border: 1.5px solid var(--pv-border); background: #fff;
    text-decoration: none; color: var(--pv-text); font-weight: 600;
    font-size: 0.9375rem; transition: all 0.15s;
}
.pv-oauth-btn:hover { border-color: var(--pv-primary); background: var(--pv-primary-light); color: var(--pv-primary); }
.pv-oauth-google:hover { border-color: #ea4335; background: #fef2f2; color: #c5221f; }
.pv-oauth-yandex:hover { border-color: #fc3f1d; background: #fff5f3; color: #fc3f1d; }
.pv-oauth-vk:hover { border-color: #0077ff; background: #eff6ff; color: #0077ff; }
.pv-oauth-mailru:hover { border-color: #005ff9; background: #eff6ff; color: #005ff9; }
.pv-vkid-block {
    margin-top: 0.5rem;
    padding: 1rem;
    border: 1px solid var(--pv-border);
    border-radius: var(--pv-radius-sm);
    background: #fff;
}

/* Table */
table.pv-table { width: 100%; border-collapse: collapse; background: var(--pv-surface); border-radius: var(--pv-radius-sm); overflow: hidden; }
table.pv-table th, table.pv-table td { border-bottom: 1px solid var(--pv-border); padding: 0.75rem 1rem; text-align: left; }
table.pv-table th { background: #f8fafc; font-weight: 600; font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--pv-text-muted); }
table.pv-table tr:last-child td { border-bottom: none; }
table.pv-table tr:hover td { background: #f8fafc; }

.pv-link-btn {
    background: none; border: none; color: var(--pv-primary);
    cursor: pointer; text-decoration: underline; padding: 0; font-family: inherit;
}
.pv-file-input { display: block; margin-top: 0.5rem; }
.pv-delta { margin: 0.75rem 0; padding: 0.875rem; border-radius: var(--pv-radius-sm); border: 1px solid var(--pv-border); background: #f8fafc; }
.pv-delta-up { border-color: #86efac; background: #f0fdf4; color: #166534; }
.pv-delta-down { border-color: #fecaca; background: #fef2f2; color: #991b1b; }
.pv-delta-neutral { border-color: var(--pv-border); background: #f8fafc; }

/* Steps */
.pv-steps { list-style: none; padding: 0; margin: 0; counter-reset: step; }
.pv-steps li {
    counter-increment: step; padding: 0.75rem 0 0.75rem 2.5rem;
    position: relative; border-bottom: 1px solid var(--pv-border);
}
.pv-steps li:last-child { border-bottom: none; }
.pv-steps li::before {
    content: counter(step); position: absolute; left: 0; top: 0.75rem;
    width: 1.75rem; height: 1.75rem; background: var(--pv-primary); color: #fff;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 0.8125rem; font-weight: 700;
}

/* Badge */
.pv-badge {
    display: inline-block; padding: 0.2rem 0.625rem; border-radius: 999px;
    font-size: 0.75rem; font-weight: 600; background: var(--pv-primary-light); color: var(--pv-primary);
}
.pv-badge-success { background: #dcfce7; color: #166534; }

/* Responsive */
@media (max-width: 640px) {
    .pv-header { flex-direction: column; gap: 0.75rem; padding: 1rem; }
    .pv-nav { justify-content: center; }
    .pv-hero h1 { font-size: 1.75rem; }
    .pv-main { padding: 1.25rem 1rem; }
}