:root {
    --bg: #05070b;
    --bg-2: #071018;

    --panel: rgba(9, 16, 24, 0.88);
    --panel-strong: rgba(11, 20, 30, 0.96);
    --panel-soft: rgba(255, 255, 255, 0.045);

    --line: rgba(83, 255, 181, 0.18);
    --line-strong: rgba(83, 255, 181, 0.44);
    --line-blue: rgba(95, 214, 255, 0.32);

    --text: #ecfff8;
    --muted: #91aea6;
    --muted-2: #69857d;

    --green: #35f5a6;
    --green-dark: #20c981;
    --green-soft: rgba(53, 245, 166, 0.13);

    --cyan: #62ddff;
    --cyan-soft: rgba(98, 221, 255, 0.12);

    --red: #ff637f;
    --red-soft: rgba(255, 99, 127, 0.12);

    --amber: #ffce6b;
    --amber-soft: rgba(255, 206, 107, 0.13);

    --shadow: 0 26px 100px rgba(0, 0, 0, 0.48);
    --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.28);

    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;

    --mono: "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: dark;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    font-family: var(--sans);
    background:
        radial-gradient(circle at 16% 12%, rgba(53, 245, 166, 0.15), transparent 28rem),
        radial-gradient(circle at 88% 10%, rgba(98, 221, 255, 0.11), transparent 26rem),
        radial-gradient(circle at 50% 100%, rgba(53, 245, 166, 0.07), transparent 30rem),
        linear-gradient(135deg, #030508 0%, #071018 48%, #020406 100%);
    overflow-x: hidden;
}

/* subtle cyber grid */
body::before {
    position: fixed;
    inset: 0;
    z-index: -3;
    content: "";
    background-image:
        linear-gradient(rgba(53, 245, 166, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(53, 245, 166, 0.045) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), transparent 86%);
}

/* soft animated glow */
body::after {
    position: fixed;
    inset: -20%;
    z-index: -2;
    content: "";
    background:
        radial-gradient(circle at 20% 20%, rgba(53, 245, 166, 0.12), transparent 22rem),
        radial-gradient(circle at 80% 30%, rgba(98, 221, 255, 0.09), transparent 22rem),
        radial-gradient(circle at 50% 80%, rgba(53, 245, 166, 0.07), transparent 26rem);
    filter: blur(8px);
    animation: backgroundFloat 18s ease-in-out infinite alternate;
}

@keyframes backgroundFloat {
    from {
        transform: translate3d(-1.5%, -1%, 0) scale(1);
    }

    to {
        transform: translate3d(1.5%, 1%, 0) scale(1.04);
    }
}

a {
    color: inherit;
    text-decoration: none;
}

button,
.btn,
.menu-link,
.nav-stat {
    -webkit-tap-highlight-color: transparent;
}

button,
.btn {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 0 18px;
    color: var(--text);
    font: inherit;
    font-size: 0.92rem;
    font-weight: 850;
    letter-spacing: -0.01em;
    background:
        linear-gradient(180deg, rgba(53, 245, 166, 0.18), rgba(53, 245, 166, 0.075));
    box-shadow:
        0 0 0 1px rgba(53, 245, 166, 0.035),
        0 14px 34px rgba(0, 0, 0, 0.26);
    cursor: pointer;
    transition:
        transform 170ms ease,
        border-color 170ms ease,
        background 170ms ease,
        box-shadow 170ms ease,
        color 170ms ease;
}

button:hover,
.btn:hover {
    transform: translateY(-2px);
    border-color: rgba(98, 221, 255, 0.72);
    box-shadow:
        0 0 24px rgba(53, 245, 166, 0.13),
        0 18px 38px rgba(0, 0, 0, 0.32);
}

button:active,
.btn:active {
    transform: translateY(0);
}

.primary {
    color: #02140d;
    border-color: rgba(53, 245, 166, 0.95);
    background:
        linear-gradient(180deg, #7affcc 0%, #2ef0a0 45%, #18c77d 100%);
    box-shadow:
        0 0 0 1px rgba(53, 245, 166, 0.16),
        0 18px 40px rgba(53, 245, 166, 0.16);
}

.secondary {
    color: #dffdf5;
    border-color: rgba(255, 255, 255, 0.11);
    background: rgba(255, 255, 255, 0.045);
}

.app-shell {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 56px;
}

/* Header */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 18px 4px 20px;
    animation: slideDown 420ms ease both;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }

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

.brand {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 14px;
}

.brand-mark {
    position: relative;
    display: grid;
    width: 52px;
    height: 52px;
    flex: 0 0 auto;
    place-items: center;
    border: 1px solid var(--line-strong);
    border-radius: 16px;
    color: var(--green);
    font-family: var(--mono);
    font-weight: 950;
    background:
        linear-gradient(135deg, rgba(53, 245, 166, 0.18), rgba(98, 221, 255, 0.05)),
        rgba(5, 10, 14, 0.9);
    box-shadow:
        inset 0 0 24px rgba(53, 245, 166, 0.12),
        0 0 26px rgba(53, 245, 166, 0.16);
    animation: brandPulse 3.8s ease-in-out infinite;
}

.brand-mark::after {
    position: absolute;
    inset: -5px;
    border: 1px solid rgba(53, 245, 166, 0.16);
    border-radius: 20px;
    content: "";
    opacity: 0;
    animation: logoRing 3.8s ease-in-out infinite;
}

@keyframes logoRing {
    0%, 100% {
        opacity: 0;
        transform: scale(0.94);
    }

    45% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes brandPulse {
    0%, 100% {
        box-shadow:
            inset 0 0 24px rgba(53, 245, 166, 0.12),
            0 0 22px rgba(53, 245, 166, 0.14);
    }

    50% {
        box-shadow:
            inset 0 0 28px rgba(53, 245, 166, 0.22),
            0 0 34px rgba(53, 245, 166, 0.25);
    }
}

.brand h1,
.quiz-panel h2,
.empty-state h3 {
    margin: 0;
    letter-spacing: -0.04em;
}

.brand h1 {
    font-size: clamp(1.35rem, 2vw, 1.95rem);
    line-height: 1.05;
}

.brand p,
.muted,
.typing-hint {
    margin: 5px 0 0;
    color: var(--muted);
}

/* Navigation */
.category-menu {
    position: sticky;
    top: 12px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 10px;
    background:
        linear-gradient(180deg, rgba(10, 18, 27, 0.86), rgba(5, 8, 12, 0.82));
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    animation: panelIn 460ms ease 80ms both;
}

.category-menu::-webkit-scrollbar {
    height: 8px;
}

.category-menu::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(53, 245, 166, 0.22);
}

.menu-link,
.nav-stat {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    gap: 7px;
    white-space: nowrap;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    padding: 0 13px;
    color: #cbe9e1;
    background: rgba(255, 255, 255, 0.038);
    transition:
        transform 160ms ease,
        border-color 160ms ease,
        background 160ms ease,
        box-shadow 160ms ease,
        color 160ms ease;
}

.menu-link:hover,
.nav-stat:hover {
    transform: translateY(-1px);
    border-color: var(--line-strong);
    background: rgba(53, 245, 166, 0.075);
}

.menu-link.active,
.nav-stat.active {
    color: var(--green);
    border-color: var(--line-strong);
    background: var(--green-soft);
    box-shadow: inset 0 0 18px rgba(53, 245, 166, 0.07);
}

.menu-link.danger {
    color: #ffdce4;
    border-color: rgba(255, 99, 127, 0.4);
    background: rgba(255, 99, 127, 0.07);
}

.menu-link.danger:hover {
    color: #fff;
    border-color: rgba(255, 99, 127, 0.72);
    box-shadow: 0 0 24px rgba(255, 99, 127, 0.12);
}

.nav-spacer {
    flex: 1 0 18px;
}

.nav-stats {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-stat {
    color: var(--muted);
}

.nav-stat strong {
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.9rem;
}

/* Main content */
.content {
    padding-top: 28px;
}

.quiz-panel {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(53, 245, 166, 0.21);
    border-radius: var(--radius-lg);
    padding: clamp(22px, 4vw, 42px);
    background:
        linear-gradient(180deg, rgba(10, 18, 27, 0.97), rgba(8, 13, 20, 0.93)),
        repeating-linear-gradient(90deg, rgba(53, 245, 166, 0.025) 0 1px, transparent 1px 16px);
    box-shadow:
        var(--shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    animation: panelIn 480ms ease both;
}

@keyframes panelIn {
    from {
        opacity: 0;
        transform: translateY(14px) scale(0.995);
    }

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

/* moving scan line */
.quiz-panel::before {
    position: absolute;
    inset: 0;
    pointer-events: none;
    content: "";
    background:
        linear-gradient(180deg, transparent 0%, rgba(98, 221, 255, 0.1) 48%, transparent 100%);
    transform: translateY(-100%);
    animation: scanLine 7.5s linear infinite;
}

.quiz-panel::after {
    position: absolute;
    inset: 0;
    pointer-events: none;
    content: "";
    background:
        radial-gradient(circle at 84% 0%, rgba(53, 245, 166, 0.12), transparent 26rem),
        radial-gradient(circle at 0% 90%, rgba(98, 221, 255, 0.08), transparent 26rem);
}

.quiz-panel > * {
    position: relative;
    z-index: 1;
}

@keyframes scanLine {
    0% {
        transform: translateY(-100%);
        opacity: 0;
    }

    12% {
        opacity: 0.7;
    }

    32%, 100% {
        transform: translateY(100%);
        opacity: 0;
    }
}

.quiz-meta {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 24px;
}

.quiz-panel h2 {
    font-size: clamp(1.6rem, 3vw, 2.55rem);
    line-height: 1.02;
}

.eyebrow,
.terminal-line,
.question-tag,
.prompt-symbol {
    color: var(--green);
    font-family: var(--mono);
}

.eyebrow {
    margin: 0 0 8px;
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
}

.terminal-line {
    margin: 0 0 14px;
    font-size: 0.92rem;
    color: var(--green);
    opacity: 0.95;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.actions.compact {
    justify-content: flex-end;
}

/* Question card */
.question-box {
    position: relative;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: clamp(18px, 3vw, 26px);
    background:
        linear-gradient(135deg, rgba(53, 245, 166, 0.07), transparent 38%),
        rgba(2, 6, 10, 0.62);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.05),
        var(--shadow-soft);
    animation: cardReveal 420ms ease 90ms both;
}

@keyframes cardReveal {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

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

.question-box::before {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    content: "";
    background:
        linear-gradient(90deg, transparent, rgba(53, 245, 166, 0.08), transparent);
    transform: translateX(-100%);
    animation: shimmer 5.5s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 55% {
        transform: translateX(-100%);
    }

    80%, 100% {
        transform: translateX(100%);
    }
}

.question-box p {
    margin: 14px 0 0;
    max-width: 980px;
    font-size: clamp(1.35rem, 3vw, 2.5rem);
    line-height: 1.16;
    font-weight: 920;
    letter-spacing: -0.045em;
}

.question-tag {
    display: inline-flex;
    align-items: center;
    border: 1px solid rgba(53, 245, 166, 0.29);
    border-radius: 999px;
    padding: 6px 11px;
    background: rgba(53, 245, 166, 0.085);
    font-size: 0.78rem;
    font-weight: 850;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}

.card-meta span {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    padding: 7px 11px;
    color: #b8d8d0;
    background: rgba(255, 255, 255, 0.04);
    font-family: var(--mono);
    font-size: 0.82rem;
}

/* Typing terminal */
.typing-terminal {
    position: relative;
    margin-top: 20px;
    overflow: hidden;
    border: 1px solid rgba(98, 221, 255, 0.25);
    border-radius: var(--radius-md);
    background:
        linear-gradient(180deg, rgba(98, 221, 255, 0.045), transparent),
        #03070b;
    box-shadow:
        inset 0 0 46px rgba(53, 245, 166, 0.055),
        var(--shadow-soft);
    animation: cardReveal 420ms ease 160ms both;
}

.typing-terminal::before {
    position: absolute;
    inset: 0;
    pointer-events: none;
    content: "";
    background: repeating-linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.026),
        rgba(255, 255, 255, 0.026) 1px,
        transparent 1px,
        transparent 5px
    );
    opacity: 0.45;
}

.typing-terminal > * {
    position: relative;
    z-index: 1;
}

.terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 12px 16px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.82rem;
}

.terminal-dots {
    display: flex;
    gap: 7px;
}

.terminal-dots span {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--green);
    box-shadow: 0 0 12px rgba(53, 245, 166, 0.35);
}

.terminal-dots span:nth-child(2) {
    background: var(--amber);
    box-shadow: 0 0 12px rgba(255, 206, 107, 0.3);
}

.terminal-dots span:nth-child(3) {
    background: var(--red);
    box-shadow: 0 0 12px rgba(255, 99, 127, 0.3);
}

.typing-terminal label,
.typing-hint,
.typing-terminal .actions {
    margin: 16px;
}

.typing-terminal label {
    display: block;
    color: #d8f5ee;
    font-weight: 850;
}

.answer-line {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    margin: 0 16px;
}

.prompt-symbol {
    white-space: nowrap;
    font-weight: 900;
    text-shadow: 0 0 12px rgba(53, 245, 166, 0.42);
}

.cyber-input {
    width: 100%;
    min-height: 54px;
    border: 1px solid rgba(53, 245, 166, 0.24);
    border-radius: 14px;
    padding: 0 16px;
    color: var(--text);
    font: 800 1rem var(--mono);
    letter-spacing: 0.01em;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
    outline: none;
    transition:
        border-color 170ms ease,
        box-shadow 170ms ease,
        background 170ms ease;
}

.cyber-input::placeholder {
    color: rgba(145, 174, 166, 0.58);
}

.cyber-input:focus {
    border-color: var(--green);
    background: rgba(53, 245, 166, 0.045);
    box-shadow:
        0 0 0 4px rgba(53, 245, 166, 0.115),
        0 0 26px rgba(53, 245, 166, 0.13);
}

.typing-hint {
    font-family: var(--mono);
    font-size: 0.86rem;
}

.typing-hint strong {
    color: var(--green);
}

/* Messages and result */
.message,
.result-panel,
.empty-state {
    margin-top: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 20px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.025));
    box-shadow: var(--shadow-soft);
    animation: cardReveal 350ms ease both;
}

.message {
    color: #ffe1e7;
    border-color: rgba(255, 99, 127, 0.4);
    background:
        linear-gradient(135deg, var(--red-soft), rgba(255, 255, 255, 0.025));
    font-weight: 800;
}

.result-panel {
    border-color: rgba(53, 245, 166, 0.36);
    background:
        linear-gradient(135deg, rgba(53, 245, 166, 0.12), rgba(255, 255, 255, 0.025));
}

.result-panel h3 {
    margin: 0;
    color: var(--green);
    font-family: var(--mono);
    font-size: clamp(1.25rem, 2vw, 1.65rem);
    letter-spacing: -0.03em;
    text-shadow: 0 0 18px rgba(53, 245, 166, 0.22);
    animation: successPulse 1.8s ease-in-out infinite;
}

@keyframes successPulse {
    0%, 100% {
        opacity: 0.9;
        text-shadow: 0 0 14px rgba(53, 245, 166, 0.22);
    }

    50% {
        opacity: 1;
        text-shadow: 0 0 26px rgba(53, 245, 166, 0.42);
    }
}

.result-panel p {
    color: #c2e8de;
}

/* Grade buttons */
.review-grade-panel {
    margin-top: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: 16px;
    background: rgba(0, 0, 0, 0.18);
}

.review-grade-panel strong {
    font-size: 1rem;
}

.grade-buttons {
    display: grid;
    grid-template-columns: repeat(4, minmax(112px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.grade-btn.again {
    border-color: rgba(255, 99, 127, 0.46);
    color: #ffdbe3;
    background: rgba(255, 99, 127, 0.07);
}

.grade-btn.again:hover {
    border-color: rgba(255, 99, 127, 0.9);
    box-shadow: 0 0 24px rgba(255, 99, 127, 0.14);
}

.grade-btn.hard {
    border-color: rgba(255, 206, 107, 0.48);
    color: #ffe4ae;
    background: rgba(255, 206, 107, 0.075);
}

.grade-btn.hard:hover {
    border-color: rgba(255, 206, 107, 0.9);
    box-shadow: 0 0 24px rgba(255, 206, 107, 0.13);
}

.explanation-box {
    margin-top: 16px;
    border: 1px solid rgba(98, 221, 255, 0.22);
    border-left: 4px solid var(--cyan);
    border-radius: 14px;
    padding: 14px 16px;
    color: #e4faff;
    background: rgba(98, 221, 255, 0.08);
}

.explanation-box strong {
    display: block;
    margin-bottom: 7px;
    color: var(--cyan);
    font-family: var(--mono);
}

/* Empty state */
.empty-state {
    text-align: left;
}

.empty-state h3 {
    color: var(--green);
    font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.empty-state p {
    color: var(--muted);
}

/* Optional key animation used by JS below */
.key-pop {
    position: fixed;
    z-index: 9999;
    pointer-events: none;
    color: var(--green);
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 900;
    text-shadow: 0 0 12px rgba(53, 245, 166, 0.9);
    animation: keyPop 620ms ease-out forwards;
}

@keyframes keyPop {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }

    to {
        opacity: 0;
        transform: translateY(-24px) scale(1.55);
    }
}

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

/* Responsive */
@media (max-width: 900px) {
    .app-shell {
        width: min(100% - 22px, 1200px);
        padding-top: 12px;
    }

    .topbar,
    .quiz-meta {
        align-items: stretch;
        flex-direction: column;
    }

    .category-menu {
        align-items: stretch;
        top: 8px;
    }

    .nav-spacer {
        display: none;
    }

    .nav-stats {
        display: contents;
    }

    .actions.compact {
        justify-content: flex-start;
    }

    .answer-line {
        grid-template-columns: 1fr;
    }

    .prompt-symbol {
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .grade-buttons {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 520px) {
    .brand {
        align-items: flex-start;
    }

    .brand-mark {
        width: 44px;
        height: 44px;
        border-radius: 14px;
    }

    .quiz-panel {
        padding: 18px;
        border-radius: 18px;
    }

    .question-box,
    .typing-terminal,
    .message,
    .result-panel,
    .empty-state {
        border-radius: 16px;
    }

    .grade-buttons {
        grid-template-columns: 1fr;
    }

    button,
    .btn {
        width: 100%;
    }

    .category-menu {
        border-radius: 16px;
    }
}


/* ================================
   Layout / spacing cleanup patch
   Add this at the END of app.css
================================ */

/* Make the main card feel more balanced */
.quiz-panel {
    max-width: 1040px;
    margin-inline: auto;
}

/* Better spacing between question and answer/result area */
.question-box {
    margin-bottom: 22px;
}

.question-box p {
    margin-top: 16px;
}

/* Keep card meta from feeling too far away */
.card-meta {
    margin-top: 16px;
}

/* Terminal should sit cleanly under the question */
.typing-terminal {
    margin-top: 0;
}

/* Correct answer panel cleanup */
.result-panel {
    margin-top: 0;
    padding: clamp(20px, 3vw, 28px);
    display: grid;
    gap: 18px;
}

.result-panel h3,
.result-panel p {
    margin: 0;
}

.result-panel > p {
    max-width: 720px;
    line-height: 1.55;
}

/* Fix spacing inside the grading box */
.review-grade-panel {
    margin-top: 0;
    padding: 20px;
    display: grid;
    gap: 8px;
}

.review-grade-panel strong,
.review-grade-panel p {
    margin: 0;
}

/* Make Again / Hard / Good / Easy look professional */
.grade-buttons {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    align-items: stretch;
}

.grade-buttons .btn {
    width: 100%;
    min-height: 50px;
    border-radius: 14px;
    padding-inline: 14px;
}

/* Fix bottom action area after correct answer */
.result-panel .actions {
    margin-top: 0;
    padding-top: 4px;
}

.result-panel .actions form {
    margin: 0;
    display: inline-flex;
}

/* Stop buttons from looking uneven */
.result-panel .actions .btn,
.result-panel .actions button {
    min-height: 46px;
}

/* Better explanation spacing */
.explanation-box {
    margin-top: 0;
}

/* Wrong answer message should align nicely */
.message {
    margin-top: 16px;
}

/* On medium screens: 2 buttons per row */
@media (max-width: 900px) {
    .grade-buttons {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* On phones: full width buttons, cleaner stacking */
@media (max-width: 520px) {
    .quiz-panel {
        max-width: 100%;
    }

    .question-box {
        margin-bottom: 18px;
    }

    .result-panel {
        gap: 16px;
        padding: 18px;
    }

    .review-grade-panel {
        padding: 16px;
    }

    .grade-buttons {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .grade-buttons .btn,
    .result-panel .actions .btn,
    .result-panel .actions button {
        width: 100%;
    }

    .result-panel .actions,
    .result-panel .actions form {
        width: 100%;
    }
}