/* ═══════════════════════════════════════════════════════════════════════════
   THE COPYWRITING BLACK BOOK - Premium Theme
   Dark, mysterious, and high-value aesthetic.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   CSS VARIABLES - Design Tokens
   ───────────────────────────────────────────────────────────────────────────── */
:root {
    /* لوحة «كتاب التسعير» — ورقي فاتح وأخضر مزرقّ */
    --color-bg: #f7f9f8;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #edf2f1;

    --color-primary: #4f46e5;
    --color-primary-light: #818cf8;
    --color-primary-dark: #3730a3;

    --color-accent: #1e1b4b;
    --color-success: #16794a;
    --color-warning: #b45309;
    --color-error: #b91c1c;

    --color-text: #1e1b4b;
    --color-text-secondary: #4a5c58;
    --color-text-muted: #85918e;

    --color-border: #dde5e3;
    --color-shadow: rgba(12, 26, 23, 0.12);

    /* Typography */
    --font-family: 'Cairo', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    /* Sharper corners for serious look */
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 var(--color-shadow);
    --shadow-md: 0 4px 6px -1px var(--color-shadow);
    --shadow-lg: 0 10px 15px -3px var(--color-shadow);
    --shadow-xl: 0 20px 25px -5px var(--color-shadow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --content-max-width: 720px;
    --topbar-height: 60px;
    --nav-footer-height: 70px;

    /* أسماء موحَّدة تحتاجها مكتبة viz المشتركة */
    --color-primary-hover: var(--color-primary-dark);
    --font-sans: var(--font-family);
    --font-mono: 'Fira Code', 'Courier New', monospace;
    --shadow-soft: 0 6px 24px -6px rgba(0, 0, 0, .55);
}

/* الوضع الليلي */
body.dark-mode {
    --color-bg: #0c1413;
    --color-bg-secondary: #121b19;
    --color-bg-tertiary: #182421;

    --color-text: #eef0fd;
    --color-text-secondary: #a3b2ae;
    --color-text-muted: #6b7a76;

    --color-border: #24322e;
    --color-shadow: rgba(0, 0, 0, .5);

    --color-primary: #818cf8;
    --color-primary-dark: #4f46e5;
    --shadow-soft: 0 6px 24px -6px rgba(0, 0, 0, .55);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
}

p {
    margin-bottom: var(--space-4);
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ─────────────────────────────────────────────────────────────────────────────
   LANDING SCREEN
   ───────────────────────────────────────────────────────────────────────────── */
.landing {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.landing__container {
    text-align: center;
    max-width: 500px;
    z-index: 1;
}

.landing__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

.landing__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.landing__cover {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-8);
}

.book-cover-placeholder {
    width: 160px;
    height: 240px;
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    color: var(--color-primary);
    box-shadow: 0 20px 40px -10px rgba(212, 175, 55, 0.2);
    transform: rotate(-3deg);
    transition: transform var(--transition-base);
}

.book-cover-placeholder:hover {
    transform: rotate(0deg) scale(1.05);
}

.book-cover-placeholder span {
    font-size: var(--font-size-sm);
    font-weight: 700;
}

.landing__stats {
    display: flex;
    justify-content: center;
    gap: var(--space-10);
    margin-bottom: var(--space-8);
}

.stat {
    text-align: center;
}

.stat__number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.landing__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg), 0 4px 20px -4px var(--color-primary);
    transition: all var(--transition-base);
}

.landing__cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), 0 8px 30px -4px var(--color-primary);
}

.landing__cta i {
    transition: transform var(--transition-base);
}

.landing__cta:hover i {
    transform: translateX(-4px);
}

.landing__continue {
    margin-top: var(--space-6);
}

.btn-link {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: color var(--transition-fast);
}

.btn-link:hover {
    color: var(--color-primary);
}

/* Decorative Circles */
.landing__decor {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.05;
}

.circle--1 {
    width: 400px;
    height: 400px;
    background: var(--color-primary);
    top: -100px;
    right: -100px;
}

.circle--2 {
    width: 300px;
    height: 300px;
    background: var(--color-accent);
    bottom: -50px;
    left: -50px;
}

.circle--3 {
    width: 200px;
    height: 200px;
    background: var(--color-primary);
    top: 50%;
    left: 10%;
}

/* ─────────────────────────────────────────────────────────────────────────────
   READER VIEW
   ───────────────────────────────────────────────────────────────────────────── */
.reader {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
}

/* Top Bar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--topbar-height);
    padding: 0 var(--space-4);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar__right,
.topbar__left {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.topbar__btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.topbar__btn:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.topbar__title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar__center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.topbar__progress {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 500;
}

.topbar__divider {
    margin: 0 var(--space-1);
    opacity: 0.5;
}

/* Progress Bar - HIDDEN as per user request */
.progress-bar {
    display: none;
}

/* Progress Text */
.topbar__progress {
    font-size: var(--font-size-base);
    /* Slightly larger */
    color: var(--color-text-muted);
    font-weight: 700;
    /* Bold numbers */
    background: var(--color-bg-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

/* Main Content */
.content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-8) var(--space-4);
    padding-bottom: calc(var(--nav-footer-height) + var(--space-8));
}

.page {
    max-width: var(--content-max-width);
    margin: 0 auto;
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page Content Styling */
.page h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--color-border);
}

.page h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
    color: var(--color-primary);
}

.page h4 {
    font-size: var(--font-size-lg);
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}

.page p {
    font-size: var(--font-size-lg);
    line-height: 1.9;
    color: var(--color-text-secondary);
}

.page ul,
.page ol {
    margin: var(--space-4) 0;
    padding-right: var(--space-6);
}

.page li {
    margin-bottom: var(--space-2);
    line-height: 1.8;
}

.page code {
    background: var(--color-bg-tertiary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: 'Courier New', monospace;
}

.page pre {
    background: var(--color-bg-tertiary);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--space-4) 0;
}

.page pre code {
    background: none;
    padding: 0;
}

/* Content Boxes */
.highlight-box,
.info-box,
.warning-box,
.success-box {
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    margin: var(--space-6) 0;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.08));
    border-right: 4px solid var(--color-primary);
}

.info-box {
    background: rgba(6, 182, 212, 0.08);
    border-right: 4px solid var(--color-accent);
}

.warning-box {
    background: rgba(245, 158, 11, 0.08);
    border-right: 4px solid var(--color-warning);
}

.success-box {
    background: rgba(16, 185, 129, 0.08);
    border-right: 4px solid var(--color-success);
}

.highlight-box h4,
.info-box h4,
.warning-box h4,
.success-box h4 {
    margin-top: 0;
    margin-bottom: var(--space-3);
    font-size: var(--font-size-lg);
}

.highlight-box p:last-child,
.info-box p:last-child,
.warning-box p:last-child,
.success-box p:last-child {
    margin-bottom: 0;
}

/* Navigation Footer */
.nav-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--nav-footer-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-4);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    z-index: 100;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.nav-btn:hover:not(:disabled) {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

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

.nav-btn--next {
    background: var(--color-primary);
    color: white;
}

.nav-btn--next:hover:not(:disabled) {
    background: var(--color-primary-dark);
    color: white;
}

.nav-dots {
    display: flex;
    gap: var(--space-2);
}

.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.nav-dot:hover {
    background: var(--color-text-muted);
}

.nav-dot.active {
    background: var(--color-primary);
    width: 24px;
    border-radius: var(--radius-full);
}

/* Side Menu */
.side-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    z-index: 200;
    transition: right var(--transition-base);
    display: flex;
    flex-direction: column;
}

.side-menu.open {
    right: 0;
}

.side-menu__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
}

.side-menu__header h3 {
    font-size: var(--font-size-lg);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.side-menu__close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
}

.side-menu__close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.side-menu__nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
}

.toc-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-1);
}

.toc-item:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.toc-item.active {
    background: var(--color-primary);
    color: white;
}

.toc-item i {
    width: 20px;
    text-align: center;
    font-size: var(--font-size-xs);
    opacity: 0.7;
}

/* Overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 150;
}

.overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* ─────────────────────────────────────────────────────────────────────────────
   RESPONSIVE DESIGN
   ───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --topbar-height: 56px;
        --nav-footer-height: 64px;
    }

    .landing__title {
        font-size: var(--font-size-3xl);
    }

    .landing__stats {
        gap: var(--space-8);
    }

    .stat__number {
        font-size: var(--font-size-2xl);
    }

    .topbar__title {
        display: none;
    }

    .nav-dots {
        display: none;
    }

    .nav-btn span {
        display: none;
    }

    .nav-btn {
        width: 44px;
        height: 44px;
        padding: 0;
        justify-content: center;
    }

    .nav-btn i {
        margin: 0;
    }
}

@media (max-width: 480px) {
    .landing {
        padding: var(--space-6);
    }

    .landing__title {
        font-size: var(--font-size-2xl);
    }

    .landing__cta {
        width: 100%;
        justify-content: center;
    }

    .content {
        padding: var(--space-6) var(--space-4);
    }

    .page h2 {
        font-size: var(--font-size-xl);
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   ANIMATIONS
   ───────────────────────────────────────────────────────────────────────────── */
@keyframes slideInFromRight {
    from {
        transform: translateX(100%);
    }

    to {
        transform: translateX(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* Smooth page transitions */
.page-enter {
    animation: fadeIn var(--transition-base);
}

/* Button press effect */
.nav-btn:active:not(:disabled) {
    transform: scale(0.95);
}

/* ─────────────────────────────────────────────────────────────────────────────
   PRINT STYLES
   ───────────────────────────────────────────────────────────────────────────── */
@media print {

    .topbar,
    .nav-footer,
    .side-menu,
    .overlay {
        display: none !important;
    }

    .content {
        padding: 0;
    }

    .page {
        max-width: 100%;
    }
}

/* ILLUSTRATIONS */
.illustration-container {
    margin: 2rem 0;
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.illustration-img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.illustration-caption {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-align: center;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    background: var(--color-bg-tertiary);
}

/* ═══════════════════════════════════════════════════════════════════════════
   عناوين ثنائية اللغة — عربي كبير وتحته إنجليزي مباعد
   ═══════════════════════════════════════════════════════════════════════════ */
.bi { margin: 2rem 0 1.25rem; }
.bi h2, .bi h3 { margin: 0; line-height: 1.35; }
.bi__en {
    display: block; margin-top: .25rem;
    font-size: .68rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase;
    color: var(--color-text-muted); direction: ltr; text-align: right;
}
.rule-gold {
    width: 46px; height: 3px; border-radius: 99px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    margin: 0 0 .8rem;
}

/* ═══ الملء المتسلسل داخل البرومبت ═══ */
mark.fill-ok {
    background: rgba(184,145,47,.16); color: var(--color-primary-dark);
    font-weight: 700; padding: .05rem .25rem; border-radius: 4px;
}
body.dark-mode mark.fill-ok { color: var(--color-primary-light); background: rgba(212,175,95,.16); }
mark.fill-miss {
    background: rgba(192,57,43,.12); color: var(--color-error);
    padding: .05rem .25rem; border-radius: 4px;
}
.prompt__missing {
    margin-top: .5rem; font-size: .78rem; color: var(--color-error);
    display: flex; align-items: center; gap: .35rem; flex-wrap: wrap;
}
.prompt__missing a { color: var(--color-error); text-decoration: underline; }
.prompt__badge--chain { background: rgba(184,145,47,.16); color: var(--color-primary-dark); }

/* ═══ لوحة ملف البراند ═══ */
.bfile {
    margin: 2rem 0; border: 1px solid var(--color-border); border-radius: 14px;
    background: var(--color-bg-secondary); overflow: hidden; box-shadow: var(--shadow-soft);
}
.bfile__head {
    display: flex; justify-content: space-between; align-items: center; gap: .75rem;
    padding: .8rem 1rem; background: var(--color-bg-tertiary); font-weight: 700; font-size: .92rem;
}
.bfile__pct { font-size: .8rem; font-weight: 600; color: var(--color-primary-dark); font-variant-numeric: tabular-nums; }
body.dark-mode .bfile__pct { color: var(--color-primary); }
.bfile__bar { height: 4px; background: var(--color-border); }
.bfile__bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light)); transition: width .5s ease; }
.bfile__list { max-height: 300px; overflow-y: auto; overscroll-behavior: contain; }
.bfile__row {
    display: grid; grid-template-columns: 18px 1fr auto; gap: .6rem; align-items: center;
    padding: .5rem 1rem; border-bottom: 1px dashed var(--color-border); font-size: .85rem;
}
.bfile__row:last-child { border-bottom: none; }
.bfile__row i { color: var(--color-text-muted); font-size: .8rem; }
.bfile__row.on i { color: var(--color-success); }
.bfile__k { color: var(--color-text-secondary); }
.bfile__row.on .bfile__k { color: var(--color-text); font-weight: 600; }
.bfile__v { color: var(--color-text-muted); font-size: .78rem; max-width: 46%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bfile__go { font-size: .75rem; color: var(--color-primary-dark); border: 1px solid var(--color-border); border-radius: 99px; padding: .12rem .55rem; text-decoration: none; }
.bfile__go:hover { border-color: var(--color-primary); }
.bfile__soon { font-size: .72rem; color: var(--color-text-muted); }
.bfile__copy {
    width: 100%; padding: .7rem; border: none; border-top: 1px solid var(--color-border);
    background: var(--color-bg-tertiary); color: var(--color-text);
    font-family: var(--font-sans); font-weight: 700; font-size: .85rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: .5rem;
}
.bfile__copy:hover { background: var(--color-primary); color: #fff; }

/* ═══ حقول الملف ═══ */
.bform { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: .9rem; margin: 1.5rem 0; }
.bform--wide { grid-template-columns: 1fr; }
.bform__f { display: flex; flex-direction: column; gap: .3rem; }
.bform__f label { font-size: .82rem; font-weight: 700; }
.bform__f small { font-size: .75rem; color: var(--color-text-muted); line-height: 1.6; }
.bform__f input, .bform__f textarea {
    padding: .6rem .75rem; border: 1px solid var(--color-border); border-radius: 8px;
    background: var(--color-bg-secondary); color: var(--color-text);
    font-family: var(--font-sans); font-size: .9rem; resize: vertical;
}
.bform__f input:focus, .bform__f textarea:focus {
    outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(184,145,47,.12);
}


/* ═══════════════════════════════════════════════════════════════════════════
   الغلاف — باب من CSS خالص. المقبض يقول «اسحب» واللوحة تقول «ادفع».
   أشهر عطل تجربة في العالم، وأقدمه، وليس على شاشة.
   ═══════════════════════════════════════════════════════════════════════════ */
.landing__cover { margin: 0 auto 1.75rem; display: flex; flex-direction: column; align-items: center; gap: .9rem; }
.cover { --cover-w: 214px; --cover-h: 296px; position: relative; width: var(--cover-w); height: var(--cover-h); perspective: 1100px; }
.cover__book { position: relative; width: 100%; height: 100%; transform: rotateY(15deg) rotateX(4deg); transform-style: preserve-3d; transition: transform .7s cubic-bezier(.22,1,.36,1); }
.cover:hover .cover__book { transform: rotateY(0) rotateX(0) translateY(-6px); }
.cover__spine { position: absolute; top: 0; right: -12px; width: 13px; height: 100%; border-radius: 0 4px 4px 0; background: linear-gradient(180deg,#3730a3,#312e81 60%,#25226b); box-shadow: inset 3px 0 7px rgba(0,0,0,.4); }
.cover__face {
    position: relative; width: 100%; height: 100%; overflow: hidden; border-radius: 10px 3px 3px 10px;
    background: linear-gradient(155deg,#ffffff 0%,#eef0fd 100%);
    box-shadow: 0 20px 42px -14px rgba(30,27,75,.4), inset 0 0 0 1px rgba(79,70,229,.28);
    padding: 1.3rem 1.1rem 1.1rem; display: flex; flex-direction: column; color: #1e1b4b;
}
/* الباب يشغل النصف الأعلى، والنصّ يبدأ تحته لا فوقه */
.cover__door { --door-h: 112px; }
.cover__face > .cover__title { margin-top: calc(var(--door-h, 112px) + 18px); }

/* الباب */
.cover__door {
    position: absolute; top: 26px; left: 50%; transform: translateX(-50%);
    width: 84px; height: 112px; border-radius: 5px 5px 2px 2px;
    background: linear-gradient(160deg,#4f46e5,#4338ca 55%,#3730a3);
    box-shadow: 0 10px 22px -8px rgba(30,27,75,.55), inset 0 0 0 1px rgba(255,255,255,.14);
}
/* حشوة الباب */
.cover__door::before {
    content: ""; position: absolute; inset: 11px 10px 30px;
    border-radius: 3px; border: 1px solid rgba(255,255,255,.22);
}
/* عتبة */
.cover__door::after {
    content: ""; position: absolute; left: -9px; right: -9px; bottom: -7px; height: 7px;
    border-radius: 2px; background: rgba(30,27,75,.18);
}
/* المقبض العمودي: يقول اسحب */
.cover__handle {
    position: absolute; top: 42px; right: 10px; width: 5px; height: 30px;
    border-radius: 3px; background: linear-gradient(180deg,#fde68a,#f59e0b);
    box-shadow: 0 2px 5px rgba(0,0,0,.35);
}
/* اللوحة: تقول ادفع */
.cover__plate {
    position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
    background: #fff; color: #3730a3; font-size: .52rem; font-weight: 800;
    padding: 3px 9px; border-radius: 3px; letter-spacing: .04em;
    box-shadow: 0 2px 6px rgba(0,0,0,.25);
}
.cover__jamb { position: absolute; inset: -6px -8px -7px; border: 2px solid rgba(79,70,229,.18); border-radius: 7px; }

.cover__title { font-size: 1.72rem; font-weight: 800; line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .3rem; color: #1e1b4b; }
.cover__sub { font-size: .72rem; color: #5b5a78; line-height: 1.7; margin-bottom: .7rem; }
.cover__tag {
    align-self: flex-start; margin-top: auto; background: #4f46e5; color: #fff;
    font-size: .6rem; font-weight: 700; padding: 4px 10px; border-radius: 999px;
}
.cover__shadow { position: absolute; bottom: -16px; left: 8%; width: 84%; height: 20px; border-radius: 50%; background: rgba(30,27,75,.22); filter: blur(13px); transition: transform .7s cubic-bezier(.22,1,.36,1), opacity .7s; }
.cover:hover .cover__shadow { transform: scale(.92); opacity: .7; }
.cover__note { font-size: .78rem; color: var(--color-text-muted); display: flex; align-items: center; gap: .4rem; }
.cover__note i { color: var(--color-primary); }
@media (prefers-reduced-motion: reduce) { .cover__book { transition: none; } }
@media (max-width: 520px) { .cover { --cover-w: 176px; --cover-h: 244px; } .cover__title { font-size: 1.55rem; } .cover__door { width: 70px; height: 94px; --door-h: 94px; } }

/* ═══════════════════════════════════════════════════════════════════════════
   الحاسبات
   ═══════════════════════════════════════════════════════════════════════════ */
.calc__row { display: grid; grid-template-columns: 1fr auto; gap: .6rem; align-items: center; padding: .45rem 0; border-bottom: 1px dashed var(--color-border); font-size: .88rem; }
.calc__row:last-child { border-bottom: none; }
.calc__row b { font-variant-numeric: tabular-nums; }
.calc__big { display: flex; align-items: baseline; gap: .5rem; margin: .2rem 0 .8rem; }
.calc__big span { font-size: 2.1rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.calc__big small { font-size: .82rem; color: var(--color-text-muted); }
.calc__warn { margin-top: .7rem; padding: .65rem .8rem; border-radius: 9px; background: rgba(180,83,9,.1); border: 1px solid rgba(180,83,9,.3); font-size: .85rem; line-height: 1.75; }
.calc__ok { margin-top: .7rem; padding: .65rem .8rem; border-radius: 9px; background: rgba(22,121,74,.1); border: 1px solid rgba(22,121,74,.3); font-size: .85rem; line-height: 1.75; }
.calc__bar { display: flex; height: 26px; border-radius: 7px; overflow: hidden; margin: .5rem 0 .3rem; }
.calc__bar div { display: grid; place-items: center; font-size: .72rem; font-weight: 700; color: #fff; white-space: nowrap; }

/* ─────────────────────────────────────────────────────────────────────────────
   مكوّنات مستعارة: عمودا «لك / ليس لك» · قائمة مرقّمة · علامات قرار
   ───────────────────────────────────────────────────────────────────────────── */
.foryou {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1.25rem 0 1.5rem;
}

/* عشرة أخطاء */
.mst { background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); margin: .6rem 0; overflow: hidden; }
.mst__h { display: flex; align-items: center; gap: .6rem; padding: .6rem .9rem; font-weight: 700; background: var(--color-bg-tertiary); }
.mst__n { width: 26px; height: 26px; border-radius: 50%; background: var(--color-primary); color: #fff; display: grid; place-items: center; font-size: .8rem; flex: none; }
.mst__b { padding: .6rem .9rem .75rem; font-size: .92rem; color: var(--color-text-secondary); line-height: 1.75; }

/* جدول القرار — علامات */
.dec-yes { color: var(--color-success); font-weight: 800; }
.dec-mid { color: var(--color-warning); font-weight: 800; }
.dec-no { color: var(--color-error); font-weight: 800; }