/* =========================================================
   Owned Notes — Blue & White Design System
   文字以黑/白为主；蓝色仅作点缀，避免大面积深蓝底与刺眼蓝字
   ========================================================= */

@import url('google-fonts.css');

:root {
    --on-blue-50: #F5F8FC;
    --on-blue-100: #EAF1FA;
    --on-blue-200: #D5E3F4;
    --on-blue-300: #B4CAE6;
    --on-blue-500: #3B6FBF;   /* 仅用于小面积强调：按钮、描边 */
    --on-blue-600: #2F5FA8;
    --on-ink: #1A1A1A;
    --on-ink-soft: #2C2C2C;
    --on-muted: #666666;
    --on-line: #E6EAF0;
    --on-surface: #FFFFFF;
    --on-bg: #F7F9FC;
    --on-radius: 14px;
    --on-radius-sm: 10px;
    --on-shadow: 0 8px 24px rgba(20, 32, 51, 0.06);
    --on-shadow-sm: 0 3px 12px rgba(20, 32, 51, 0.05);
    --on-font: 'Noto Sans SC', 'Microsoft YaHei UI', sans-serif;
    --on-display: 'Outfit', 'Noto Sans SC', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--on-font);
    background: var(--on-bg);
    color: var(--on-ink);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .hero-title, .display-font {
    font-family: var(--on-display);
    letter-spacing: -0.02em;
    color: var(--on-ink);
}

a {
    color: var(--on-ink-soft);
    text-decoration: none;
}
a:hover {
    color: var(--on-ink);
}

/* ---------- Public Navbar ---------- */
.site-navbar {
    background: rgba(255, 255, 255, 0.92) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--on-line);
}
.site-navbar .navbar-brand {
    font-family: var(--on-display);
    font-weight: 700;
    color: var(--on-ink) !important;
    letter-spacing: -0.02em;
}
.site-navbar .nav-link {
    color: var(--on-muted) !important;
    font-weight: 500;
    border-radius: 999px;
    padding: 0.45rem 0.9rem !important;
    margin: 0 0.1rem;
    transition: background .18s ease, color .18s ease;
}
.site-navbar .nav-link:hover,
.site-navbar .nav-link:focus,
.site-navbar .nav-link.active {
    color: var(--on-ink) !important;
    background: #F0F1F3;
}
.site-navbar .dropdown-menu {
    border: 1px solid var(--on-line);
    border-radius: var(--on-radius-sm);
    box-shadow: var(--on-shadow);
    padding: 0.4rem;
}
.site-navbar .dropdown-item {
    border-radius: 8px;
    font-weight: 500;
    color: var(--on-ink);
}
.site-navbar .dropdown-item:hover,
.site-navbar .dropdown-item:focus {
    background: #F0F1F3;
    color: var(--on-ink);
}
.site-navbar .navbar-toggler {
    border-color: var(--on-line);
}
.site-navbar .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2826, 26, 26, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ---------- Footer ---------- */
.site-footer {
    background: #FFFFFF;
    border-top: 1px solid var(--on-line);
    color: var(--on-muted);
    padding: 1.75rem 0 !important;
}
.site-footer p {
    font-size: 0.92rem;
}

/* ---------- Page shells ---------- */
.page-shell {
    padding: 2.5rem 0 3.5rem;
}
.page-header {
    margin-bottom: 1.75rem;
}
.page-header h1,
.page-header h2 {
    font-weight: 700;
    color: var(--on-ink);
    margin-bottom: 0.4rem;
}
.page-header p {
    color: var(--on-muted);
    margin-bottom: 0;
}

.surface-card {
    background: var(--on-surface);
    border: 1px solid var(--on-line);
    border-radius: var(--on-radius);
    box-shadow: var(--on-shadow-sm);
}

/* ---------- Buttons（蓝色仅用于按钮等小面积控件） ---------- */
.btn-primary {
    --bs-btn-bg: var(--on-blue-600);
    --bs-btn-border-color: var(--on-blue-600);
    --bs-btn-hover-bg: var(--on-blue-500);
    --bs-btn-hover-border-color: var(--on-blue-500);
    --bs-btn-active-bg: #274F8F;
    --bs-btn-active-border-color: #274F8F;
    --bs-btn-color: #FFFFFF;
    --bs-btn-hover-color: #FFFFFF;
    --bs-btn-font-weight: 600;
    border-radius: 999px;
    box-shadow: 0 6px 14px rgba(47, 95, 168, 0.18);
}
.btn-outline-primary {
    --bs-btn-color: var(--on-ink);
    --bs-btn-border-color: var(--on-blue-300);
    --bs-btn-hover-bg: var(--on-blue-100);
    --bs-btn-hover-border-color: var(--on-blue-300);
    --bs-btn-hover-color: var(--on-ink);
    border-radius: 999px;
    font-weight: 600;
}
.btn-light {
    border-radius: 999px;
    font-weight: 600;
    color: var(--on-ink);
}
.btn-outline-light {
    border-radius: 999px;
    font-weight: 600;
    color: var(--on-ink);
    border-color: var(--on-line);
    background: #fff;
}
.btn-outline-light:hover {
    color: var(--on-ink);
    background: var(--on-blue-50);
    border-color: var(--on-blue-200);
}
.btn-secondary,
.btn-outline-secondary {
    border-radius: 999px;
}
.btn-dark {
    background: var(--on-ink);
    border-color: var(--on-ink);
    border-radius: 999px;
    font-weight: 600;
    color: #FFFFFF;
}
.btn-dark:hover {
    background: #333;
    border-color: #333;
    color: #FFFFFF;
}

/* ---------- Cards / lists ---------- */
.card {
    border: 1px solid var(--on-line);
    border-radius: var(--on-radius);
    box-shadow: var(--on-shadow-sm);
    background: var(--on-surface);
}
.card-header {
    background: #FFFFFF;
    border-bottom: 1px solid var(--on-line);
    font-weight: 600;
    color: var(--on-ink);
}

.list-group-item {
    border-color: var(--on-line);
    padding: 1rem 1.15rem;
    color: var(--on-ink);
}
.list-group-item-action:hover,
.list-group-item-action:focus {
    background: var(--on-blue-50);
    color: var(--on-ink);
}
.list-group-item.active {
    background: var(--on-blue-100);
    border-color: var(--on-blue-200);
    color: var(--on-ink);
}

.form-control,
.form-select {
    border-color: var(--on-line);
    border-radius: var(--on-radius-sm);
    padding: 0.65rem 0.9rem;
    background-color: #FBFCFE;
    color: var(--on-ink);
}
.form-control:focus,
.form-select:focus {
    border-color: var(--on-blue-300);
    box-shadow: 0 0 0 0.2rem rgba(59, 111, 191, 0.12);
}
.form-label {
    font-weight: 600;
    color: var(--on-ink);
    font-size: 0.92rem;
}

.table {
    --bs-table-bg: transparent;
    color: var(--on-ink);
}
.table > :not(caption) > * > * {
    border-bottom-color: var(--on-line);
}
.table thead th {
    color: var(--on-ink);
    font-weight: 600;
    background: var(--on-blue-50);
}
.table-striped > tbody > tr:nth-of-type(odd) > * {
    --bs-table-bg-type: rgba(245, 248, 252, 0.8);
}
.table-hover > tbody > tr:hover > * {
    --bs-table-bg-state: rgba(234, 241, 250, 0.9);
}

.badge.bg-primary {
    background-color: var(--on-blue-100) !important;
    color: var(--on-ink) !important;
}
.badge.bg-secondary {
    background-color: #EEEEEE !important;
    color: var(--on-muted) !important;
}
.alert {
    border-radius: var(--on-radius-sm);
    border: 1px solid transparent;
}
.alert-info {
    background: var(--on-blue-50);
    border-color: var(--on-blue-200);
    color: var(--on-ink);
}
.text-primary {
    color: var(--on-ink) !important;
}

/* ---------- Hero / Features（浅色底，黑字） ---------- */
.hero-section {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #FFFFFF 0%, #F5F6F8 100%);
    color: var(--on-ink);
    padding: 5rem 0 4.25rem;
    text-align: center;
    border-bottom: 1px solid var(--on-line);
}
.hero-section::after {
    display: none;
}
.hero-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    background: #FFFFFF;
    border: 1px solid var(--on-line);
    border-radius: 999px;
    padding: 0.35rem 0.9rem 0.35rem 0.4rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
    color: var(--on-ink);
}
.hero-brand img {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}
.hero-title {
    font-weight: 800;
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    margin-bottom: 0.85rem;
    color: var(--on-ink);
    text-shadow: none;
}
.hero-section .lead {
    max-width: 640px;
    margin: 0 auto;
    color: var(--on-muted);
    font-size: 1.12rem;
}
.hero-section .btn-light {
    color: var(--on-ink);
    border: 1px solid var(--on-line);
    box-shadow: var(--on-shadow-sm);
}

.feature-section {
    padding: 2rem 0;
    border-bottom: 1px solid var(--on-line);
    background: #FFFFFF;
}
.feature-section:nth-child(even) {
    background: #FAFBFC;
}
.feature-title {
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--on-ink);
    font-size: 1.55rem;
}
.feature-description {
    font-size: 1.02rem;
    color: var(--on-muted);
    margin-bottom: 0;
    line-height: 1.65;
}
.feature-kicker {
    color: var(--on-muted);
    letter-spacing: 0.08em;
}

/* 轮播：随列宽 16:10 定高（接近初始 w-100）；cover 居中裁剪 */
.feature-carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background: #F3F4F6;
    border: 1px solid var(--on-line);
    border-radius: var(--on-radius);
    box-shadow: var(--on-shadow-sm);
    overflow: hidden;
}
.feature-carousel .carousel-inner {
    position: absolute;
    inset: 0;
    height: 100%;
}
.feature-carousel .carousel-item {
    height: 100%;
    background: #F3F4F6;
}
.feature-carousel .carousel-item.active,
.feature-carousel .carousel-item-next,
.feature-carousel .carousel-item-prev {
    display: block;
}
.feature-carousel .carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    cursor: zoom-in;
    border-radius: 0;
    box-shadow: none;
    border: 0;
}
.feature-carousel .carousel-control-prev,
.feature-carousel .carousel-control-next {
    width: 12%;
}
.feature-carousel .carousel-control-prev-icon,
.feature-carousel .carousel-control-next-icon {
    filter: none;
    background-color: rgba(255, 255, 255, 0.88);
    border-radius: 999px;
    background-size: 55% 55%;
    width: 2.25rem;
    height: 2.25rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231A1A1A'%3e%3cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e");
}
.feature-carousel .carousel-control-next-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231A1A1A'%3e%3cpath d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.welcome-panel {
    background: var(--on-surface);
    border: 1px solid var(--on-line);
    border-radius: calc(var(--on-radius) + 4px);
    box-shadow: var(--on-shadow);
    padding: 3rem 2rem;
    max-width: 720px;
    margin: 3rem auto;
    text-align: center;
}
.welcome-panel h2 {
    color: var(--on-ink);
    font-weight: 700;
}

.download-item,
.help-item {
    border-radius: var(--on-radius-sm) !important;
    margin-bottom: 0.75rem;
    border: 1px solid var(--on-line) !important;
    background: var(--on-surface);
    box-shadow: var(--on-shadow-sm);
}
.buy-card {
    max-width: 520px;
    border: 1px solid var(--on-line);
    overflow: hidden;
}
.buy-card .card-body {
    background: #FFFFFF;
}
.buy-card .card-title {
    color: var(--on-ink);
    font-weight: 700;
}
.buy-card .buy-plan-title {
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    color: var(--on-ink);
}
.buy-card .buy-plan-info {
    white-space: pre-wrap;
    color: var(--on-ink);
    font-size: 1.08rem;
    font-weight: 600;
    line-height: 2;
    margin-bottom: 0;
}
.buy-card .btn {
    min-width: 10rem;
    font-weight: 700;
}

/* ---------- Admin layout ---------- */
.admin-shell {
    min-height: calc(100vh - 64px);
}
.admin-sidebar {
    background: #FFFFFF;
    border-right: 1px solid var(--on-line);
    min-height: calc(100vh - 64px);
    padding-top: 1rem;
}
.admin-sidebar .nav-link {
    color: var(--on-muted);
    font-weight: 600;
    border-radius: 10px;
    margin: 0.2rem 0.75rem;
    padding: 0.7rem 0.95rem;
    transition: all .15s ease;
}
.admin-sidebar .nav-link:hover {
    background: #F3F4F6;
    color: var(--on-ink);
}
.admin-sidebar .nav-link.active,
.admin-sidebar .nav-link[aria-current="page"] {
    background: #F0F1F3;
    color: var(--on-ink) !important;
    box-shadow: none;
    border: 1px solid var(--on-line);
}
.admin-main {
    background: transparent;
}
.admin-page-title {
    color: var(--on-ink);
    font-family: var(--on-display);
    font-weight: 700;
}
.admin-toolbar {
    background: var(--on-surface);
    border: 1px solid var(--on-line);
    border-radius: var(--on-radius-sm);
    box-shadow: var(--on-shadow-sm);
}
.admin-welcome-card {
    background: #FFFFFF;
    border: 1px solid var(--on-line);
    color: var(--on-ink);
    border-radius: var(--on-radius);
    box-shadow: var(--on-shadow-sm);
    border-left: 4px solid var(--on-blue-500);
}
.admin-welcome-card .card-title {
    font-family: var(--on-display);
    font-weight: 700;
    color: var(--on-ink);
}
.admin-welcome-card .card-text {
    color: var(--on-muted);
}

.login-wrap {
    min-height: calc(100vh - 180px);
    display: flex;
    align-items: center;
}
.login-card {
    border: 1px solid var(--on-line);
    border-radius: calc(var(--on-radius) + 4px);
    box-shadow: var(--on-shadow);
    overflow: hidden;
}
.login-card .login-accent {
    height: 4px;
    background: var(--on-blue-500);
}

/* Markdown help body */
.markdown-body {
    color: var(--on-ink);
    line-height: 1.75;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
    color: var(--on-ink);
    font-family: var(--on-display);
    border-bottom: 1px solid var(--on-line);
    padding-bottom: 0.35rem;
}
.markdown-body a {
    color: var(--on-ink-soft);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.markdown-body code {
    background: var(--on-blue-50);
    color: var(--on-ink);
    border-radius: 6px;
    padding: 0.1rem 0.35rem;
}
.markdown-body pre {
    background: #1A1A1A;
    color: #FFFFFF;
    border-radius: var(--on-radius-sm);
    padding: 1rem;
}
.markdown-body img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1rem 0;
    border-radius: var(--on-radius-sm);
}
.markdown-body ul,
.markdown-body ol {
    padding-left: 1.75rem;
    margin: 0.75rem 0 1.1rem;
}
.markdown-body ul {
    list-style-type: disc;
}
.markdown-body ol {
    list-style-type: decimal;
}
.markdown-body li {
    margin: 0.4rem 0;
    line-height: 1.75;
}
.markdown-body li > p {
    margin-bottom: 0.4rem;
}
.markdown-body li > ul,
.markdown-body li > ol {
    margin-top: 0.35rem;
    margin-bottom: 0.35rem;
}

@media (max-width: 768px) {
    .hero-section { padding: 3.25rem 0 2.75rem; }
    .feature-section { padding: 1.5rem 0; }
    .admin-sidebar { min-height: auto; border-right: 0; border-bottom: 1px solid var(--on-line); }
}