:root {
    --paper: oklch(96% 0.018 88);
    --surface: oklch(98.5% 0.01 88);
    --ink: oklch(22% 0.035 165);
    --ink-soft: oklch(43% 0.03 160);
    --line: oklch(79% 0.025 85);
    --green: oklch(39% 0.09 158);
    --green-dark: oklch(29% 0.07 158);
    --coral: oklch(62% 0.14 35);
    --gold: oklch(74% 0.13 78);
    --error: oklch(48% 0.17 28);
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 20rem;
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "IBM Plex Sans Arabic", sans-serif;
    font-size: 1rem;
    line-height: 1.55;
    font-kerning: normal;
}

button,
input {
    font: inherit;
}

a {
    color: inherit;
}

h1,
h2,
h3,
h4,
p {
    margin-top: 0;
}

h1,
h2,
h3,
h4,
legend,
button {
    font-family: "Alexandria", sans-serif;
}

.skip-link {
    position: fixed;
    z-index: 100;
    inset-block-start: 0.75rem;
    inset-inline-start: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--ink);
    color: var(--paper);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-180%);
    transition:
        opacity 160ms var(--ease-out),
        transform 160ms var(--ease-out);
}

.skip-link:focus {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    width: min(100% - 2rem, 68rem);
    min-height: 4.5rem;
    margin-inline: auto;
    border-bottom: 1px solid var(--line);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: "Alexandria", sans-serif;
    font-weight: 700;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 2rem;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--ink);
    color: var(--paper);
}

nav {
    display: flex;
    gap: var(--space-xs);
}

nav a {
    min-height: 2.75rem;
    padding: 0.6rem;
    text-underline-offset: 0.25rem;
}

nav a[aria-current="page"] {
    color: var(--green);
    font-weight: 700;
}

main,
footer {
    width: min(100% - 2rem, 58rem);
    margin-inline: auto;
}

.intro {
    padding-block: clamp(2.5rem, 8vw, 5rem) var(--space-xl);
}

.eyebrow {
    margin-bottom: var(--space-xs);
    color: var(--green);
    font-family: "Alexandria", sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
}

.intro h1 {
    margin-bottom: var(--space-sm);
    font-size: clamp(2.35rem, 7vw, 4.5rem);
    line-height: 1.08;
    letter-spacing: -0.05em;
}

.intro > p:last-child {
    margin-bottom: 0;
    color: var(--ink-soft);
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
}

.calculator {
    border: 1px solid var(--ink);
    background: var(--surface);
}

form {
    display: grid;
    gap: var(--space-xl);
    padding: clamp(1.25rem, 5vw, 3rem);
}

fieldset {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

legend,
.input-panel > label {
    display: block;
    width: 100%;
    margin-bottom: var(--space-sm);
    padding: 0;
    font-size: 1rem;
    font-weight: 700;
}

.segmented-control,
.choice-row {
    display: grid;
    gap: var(--space-xs);
}

.segmented-control {
    grid-template-columns: 1fr 1fr;
    padding: 0.25rem;
    background: var(--paper);
    border: 1px solid var(--line);
}

.segmented-control label,
.choice {
    position: relative;
    cursor: pointer;
}

.segmented-control input,
.choice input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.segmented-control span,
.choice span {
    display: grid;
    min-height: 3rem;
    place-items: center;
    padding: 0.6rem 0.75rem;
    font-family: "Alexandria", sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    transition:
        background-color 140ms var(--ease-out),
        color 140ms var(--ease-out),
        transform 140ms var(--ease-out);
}

.segmented-control input:checked + span {
    background: var(--ink);
    color: var(--surface);
}

.choice span {
    border: 1px solid var(--ink);
    background: transparent;
}

.choice input:checked + span {
    background: var(--green-dark);
    color: var(--surface);
}

.segmented-control input:focus-visible + span,
.choice input:focus-visible + span,
button:focus-visible,
a:focus-visible,
summary:focus-visible,
.institute-toggle input:focus-visible + span {
    outline: 3px solid var(--gold);
    outline-offset: 3px;
}

.input-panel input {
    width: 100%;
    min-height: 4.25rem;
    padding: 0.7rem 0;
    border: 0;
    border-bottom: 2px solid var(--ink);
    border-radius: 0;
    background: transparent;
    color: var(--ink);
    font-family: "Alexandria", sans-serif;
    font-size: clamp(1.65rem, 6vw, 2.6rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.input-panel input::placeholder {
    color: color-mix(in oklch, var(--ink-soft) 65%, var(--paper));
}

.input-panel input:focus {
    border-color: var(--green);
    outline: 0;
}

.input-panel input[aria-invalid="true"] {
    border-color: var(--error);
}

.score-input {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    border-bottom: 2px solid var(--ink);
}

.score-input input {
    min-width: 0;
    border: 0;
}

.score-input:focus-within {
    border-color: var(--green);
}

.score-input > span {
    flex: 0 0 auto;
    color: var(--ink-soft);
    font-weight: 600;
}

.field-hint {
    margin: calc(var(--space-xl) * -0.75) 0 0;
    color: var(--ink-soft);
    font-size: 0.88rem;
}

.institute-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    width: fit-content;
    min-height: 2.75rem;
    cursor: pointer;
    font-weight: 600;
}

.institute-toggle input {
    position: absolute;
    opacity: 0;
}

.institute-toggle > span {
    position: relative;
    width: 2.6rem;
    height: 1.5rem;
    border: 1px solid var(--ink);
    border-radius: 99px;
    background: var(--paper);
}

.institute-toggle > span::after {
    position: absolute;
    inset-block-start: 0.2rem;
    inset-inline-start: 0.2rem;
    width: 0.95rem;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--ink);
    content: "";
    transition: transform 160ms var(--ease-out);
}

.institute-toggle input:checked + span {
    background: var(--green);
}

.institute-toggle input:checked + span::after {
    background: var(--surface);
    transform: translateX(-1.05rem);
}

#predict-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    width: 100%;
    min-height: 3.75rem;
    padding: 0.85rem 1.1rem;
    border: 1px solid var(--green-dark);
    background: var(--green-dark);
    color: var(--surface);
    cursor: pointer;
    font-weight: 700;
    transition:
        background-color 140ms var(--ease-out),
        transform 140ms var(--ease-out);
}

#predict-button:active {
    transform: translateY(1px);
}

#predict-button:disabled {
    cursor: wait;
    opacity: 0.65;
}

.form-error {
    padding: var(--space-md);
    border: 1px solid var(--error);
    color: var(--error);
    font-weight: 600;
}

.loading-state {
    padding-block: var(--space-2xl);
    text-align: center;
}

.loading-state span {
    display: block;
    width: min(100%, 20rem);
    height: 3px;
    margin: 0 auto var(--space-md);
    overflow: hidden;
    background: var(--line);
}

.loading-state span::after {
    display: block;
    width: 38%;
    height: 100%;
    background: var(--green);
    content: "";
    animation: loading 1.1s infinite var(--ease-out);
}

.prediction-result {
    padding-block: clamp(2.5rem, 8vw, 5rem);
    scroll-margin-top: var(--space-md);
}

.result-summary {
    display: grid;
    gap: var(--space-lg);
    align-items: end;
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--ink);
}

.result-summary h2 {
    margin-bottom: var(--space-xs);
    font-size: clamp(1.65rem, 5vw, 2.75rem);
    line-height: 1.2;
}

#student-meta {
    margin-bottom: 0;
    color: var(--ink-soft);
}

.score-summary {
    display: grid;
    grid-template-columns: auto auto;
    align-items: baseline;
    justify-content: start;
    gap: 0 var(--space-xs);
    font-variant-numeric: tabular-nums;
}

.score-summary strong {
    color: var(--green);
    font-family: "Alexandria", sans-serif;
    font-size: clamp(2.8rem, 10vw, 5rem);
    line-height: 0.95;
}

.score-summary span {
    color: var(--ink-soft);
    font-weight: 600;
}

.score-summary small {
    grid-column: 1 / -1;
    color: var(--ink-soft);
}

.rank-summary {
    display: grid;
    gap: 0.2rem;
    padding-block: var(--space-lg);
    border-bottom: 1px solid var(--line);
}

.rank-summary > span,
.rank-summary small {
    color: var(--ink-soft);
}

.rank-summary > span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.rank-summary strong {
    font-family: "Alexandria", sans-serif;
    font-size: clamp(1.3rem, 4vw, 2rem);
}

.results-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    justify-content: space-between;
    gap: var(--space-md);
    padding-block: var(--space-2xl) var(--space-lg);
}

.results-heading h2 {
    margin-bottom: 0;
    font-size: clamp(1.8rem, 5vw, 3rem);
    line-height: 1.15;
}

#track-summary {
    color: var(--ink-soft);
    font-weight: 600;
}

.calculation-guide {
    margin-bottom: var(--space-lg);
    border: 1px solid var(--line);
    background: var(--surface);
}

.calculation-guide summary {
    min-height: 3rem;
    padding: 0.7rem var(--space-md);
    cursor: pointer;
    color: var(--green);
    font-family: "Alexandria", sans-serif;
    font-size: 0.88rem;
    font-weight: 700;
}

.calculation-guide p {
    max-width: 68ch;
    margin: 0;
    padding: 0 var(--space-md) var(--space-md);
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.prediction-bands {
    border-top: 1px solid var(--ink);
}

.band {
    border-bottom: 1px solid var(--ink);
}

.band summary {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-md);
    align-items: center;
    min-height: 5.25rem;
    padding-block: var(--space-md);
    cursor: pointer;
    list-style: none;
}

.band summary::-webkit-details-marker {
    display: none;
}

.band-title {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0 var(--space-sm);
    align-items: center;
}

.band-title i {
    grid-row: 1 / span 2;
    width: 0.65rem;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--green);
}

.band-title strong {
    font-family: "Alexandria", sans-serif;
    font-size: 1.15rem;
}

.band-title small {
    color: var(--ink-soft);
}

.band-count {
    display: grid;
    grid-template-columns: auto auto;
    gap: 0 0.3rem;
    align-items: center;
    min-width: 4.5rem;
    color: var(--green);
    font-family: "Alexandria", sans-serif;
    font-weight: 700;
    text-align: end;
}

.band-count > strong {
    font-size: 1.35rem;
}

.band-count > small {
    color: var(--ink-soft);
    font-family: "IBM Plex Sans Arabic", sans-serif;
    font-size: 0.7rem;
    font-weight: 600;
}

.band-count .help-tip {
    grid-column: 1 / -1;
    justify-self: end;
}

.band-close .band-title i {
    background: var(--gold);
}

.band-close .band-count {
    color: oklch(60% 0.12 76);
}

.band-stretch .band-title i {
    background: var(--coral);
}

.band-stretch .band-count {
    color: var(--coral);
}

.band summary::after {
    grid-column: 1 / -1;
    color: var(--ink-soft);
    content: "إظهار الاختيارات";
    font-size: 0.78rem;
}

.band[open] summary::after {
    content: "إخفاء الاختيارات";
}

.band-content {
    padding-bottom: var(--space-lg);
}

.band ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

.college-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-xs) var(--space-md);
    padding-block: var(--space-md);
    border-top: 1px solid var(--line);
}

.college-copy {
    min-width: 0;
}

.college-copy > small {
    color: var(--ink-soft);
}

.college-copy h4 {
    margin-bottom: 0;
    font-size: 1rem;
    line-height: 1.4;
}

.aptitude-flag {
    margin-inline-start: var(--space-xs);
    color: var(--coral);
    font-weight: 700;
}

.college-numbers {
    display: flex;
    gap: var(--space-md);
    text-align: end;
    font-variant-numeric: tabular-nums;
}

.college-numbers span {
    display: grid;
}

.college-numbers small,
.last-year {
    color: var(--ink-soft);
    font-size: 0.72rem;
}

.college-numbers small,
.last-year {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.college-numbers strong {
    font-family: "Alexandria", sans-serif;
}

.positive {
    color: var(--green);
}

.negative {
    color: var(--coral);
}

.last-year {
    grid-column: 1 / -1;
}

.result-limit,
.empty-band {
    display: block;
    margin: var(--space-sm) 0 0;
    color: var(--ink-soft);
}

.help-tip {
    position: relative;
    display: inline-grid;
    flex: 0 0 auto;
    width: 1.1rem;
    height: 1.1rem;
    place-items: center;
    border: 1px solid currentColor;
    border-radius: 50%;
    color: var(--green);
    cursor: help;
    font-family: "IBM Plex Sans Arabic", sans-serif;
    font-size: 0.68rem;
    font-style: normal;
    font-weight: 700;
    line-height: 1;
}

.help-tip::after {
    position: absolute;
    z-index: 20;
    inset-block-end: calc(100% + 0.5rem);
    inset-inline-end: -0.25rem;
    width: min(17rem, calc(100vw - 2.5rem));
    padding: 0.65rem 0.75rem;
    border-radius: 0.25rem;
    background: var(--ink);
    box-shadow: 0 0.5rem 1.5rem color-mix(in oklch, var(--ink) 18%, transparent);
    color: var(--surface);
    content: attr(data-tooltip);
    font-family: "IBM Plex Sans Arabic", sans-serif;
    font-size: 0.78rem;
    font-weight: 500;
    line-height: 1.6;
    opacity: 0;
    pointer-events: none;
    text-align: start;
    transform: translateY(0.25rem);
    transition:
        opacity 140ms var(--ease-out),
        transform 140ms var(--ease-out);
}

.help-tip:hover::after,
.help-tip:focus::after,
.help-tip:focus-visible::after {
    opacity: 1;
    transform: translateY(0);
}

.help-tip:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

.references {
    margin-top: var(--space-2xl);
    border-block: 1px solid var(--ink);
}

.references summary {
    padding-block: var(--space-md);
    cursor: pointer;
    font-family: "Alexandria", sans-serif;
    font-weight: 700;
}

.reference-content {
    padding-bottom: var(--space-lg);
}

.reference-content dl {
    display: grid;
    gap: var(--space-md);
    margin: 0 0 var(--space-lg);
}

.reference-content dl > div {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: var(--space-md);
    align-items: baseline;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--line);
}

.reference-content dt {
    color: var(--green);
    font-family: "Alexandria", sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.reference-content dd {
    margin: 0;
    color: var(--ink-soft);
}

#method-explanation {
    max-width: 60ch;
    color: var(--ink-soft);
}

.source-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.source-links a {
    color: var(--green);
    font-weight: 700;
    text-underline-offset: 0.25rem;
}

.prediction-disclaimer {
    margin: var(--space-lg) 0 0;
    color: var(--ink-soft);
    font-size: 0.85rem;
}

footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-md);
    padding-block: var(--space-xl);
    border-top: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 0.85rem;
}

footer a {
    color: var(--green);
    font-weight: 700;
}

@keyframes loading {
    from {
        transform: translateX(180%);
    }
    to {
        transform: translateX(-260%);
    }
}

@media (min-width: 42rem) {
    .choice-row {
        grid-template-columns: repeat(3, 1fr);
    }

    .result-summary {
        grid-template-columns: 1fr auto;
    }

    .reference-content dl {
        grid-template-columns: repeat(3, 1fr);
    }

    .reference-content dl > div {
        grid-template-columns: 1fr;
    }
}

@media (hover: hover) {
    nav a:hover,
    .source-links a:hover,
    footer a:hover {
        color: var(--coral);
    }

    .choice span:hover,
    .segmented-control span:hover {
        transform: translateY(-1px);
    }

    #predict-button:hover {
        background: var(--green);
    }

    .band summary:hover .band-title strong {
        color: var(--green);
    }
}

@media (pointer: coarse) {
    nav a,
    .segmented-control span,
    .choice span,
    .institute-toggle,
    .references summary {
        min-height: 3rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}