* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --green: #0f9d78;
    --dark-green: #08745a;
    --light-green: #e8f8f2;
    --navy: #1d3557;
    --text: #41566b;
    --muted: #728499;
    --border: #dce9e5;
    --white: #ffffff;
    --gold: #f4b942;
    --danger: #d14d4d;
    --background: #f7fcfa;
    --shadow: 0 18px 45px rgba(23, 77, 68, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(
            circle at top left,
            rgba(15, 157, 120, 0.12),
            transparent 30%
        ),
        radial-gradient(
            circle at bottom right,
            rgba(37, 99, 235, 0.09),
            transparent 32%
        ),
        var(--background);
    font-family: Arial, sans-serif;
}

button,
input,
select {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: inherit;
}

.academy-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    min-height: 74px;
    padding: 12px 6%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid rgba(220, 233, 229, 0.9);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(16px);
}

.academy-logo {
    color: var(--green);
    font-size: 1.4rem;
    font-weight: 900;
    text-decoration: none;
}

.academy-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.academy-nav a {
    padding: 10px 13px;
    border-radius: 12px;
    color: var(--navy);
    font-size: 0.82rem;
    font-weight: 800;
    text-decoration: none;
    transition:
        color 0.2s ease,
        background 0.2s ease,
        transform 0.2s ease;
}

.academy-nav a:hover,
.academy-nav a.active {
    color: var(--dark-green);
    background: var(--light-green);
    transform: translateY(-1px);
}

.academy-nav .account-link {
    color: white;
    background: var(--green);
}

.page-shell {
    width: min(1180px, 100%);
    margin: 0 auto;
    padding: 55px 22px 90px;
    animation: pageFade 0.55s ease both;
}

.eyebrow {
    color: var(--green);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.page-title {
    margin-top: 8px;
    color: var(--navy);
    font-size: clamp(2.5rem, 6vw, 5rem);
    line-height: 1.02;
    letter-spacing: -0.04em;
}

.page-description {
    max-width: 700px;
    margin-top: 14px;
    color: var(--muted);
    line-height: 1.8;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    align-items: center;
    gap: 30px;
}

.profile-panel,
.surface-card {
    border: 1px solid var(--border);
    border-radius: 27px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
}

.profile-panel {
    padding: 25px;
}

.profile-heading {
    display: flex;
    align-items: center;
    gap: 15px;
}

.profile-avatar {
    width: 65px;
    height: 65px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    border-radius: 20px;
    color: white;
    background: linear-gradient(135deg, var(--green), #2563eb);
    font-size: 1.25rem;
    font-weight: 900;
}

.profile-heading h2 {
    color: var(--navy);
    font-size: 1.35rem;
}

.profile-heading p {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.78rem;
}

.stat-grid {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 9px;
}

.stat-card {
    padding: 14px 10px;
    border-radius: 16px;
    text-align: center;
    background: var(--light-green);
}

.stat-card span {
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 800;
}

.stat-card strong {
    display: block;
    margin-top: 5px;
    color: var(--navy);
    font-size: 1.1rem;
}

.progress-label {
    margin-top: 18px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 800;
}

.progress-track {
    height: 11px;
    margin-top: 8px;
    overflow: hidden;
    border-radius: 999px;
    background: #dfebe7;
}

.progress-fill {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        var(--green),
        #22c55e,
        var(--gold)
    );
    transition: width 0.55s ease;
}

.section-heading {
    margin-top: 52px;
    margin-bottom: 21px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
}

.section-heading h2 {
    color: var(--navy);
    font-size: 2rem;
}

.section-heading p {
    max-width: 540px;
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.65;
}

.button {
    min-height: 47px;
    padding: 12px 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    border-radius: 14px;
    cursor: pointer;
    font-weight: 900;
    text-align: center;
    text-decoration: none;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        opacity 0.2s ease;
}

.button:hover {
    transform: translateY(-2px);
}

.button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.button-primary {
    color: white;
    background: linear-gradient(135deg, var(--green), #13b989);
    box-shadow: 0 10px 24px rgba(15, 157, 120, 0.19);
}

.button-secondary {
    color: var(--dark-green);
    background: var(--light-green);
}

.button-dark {
    color: white;
    background: var(--navy);
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 17px;
}

.level-card {
    position: relative;
    padding: 23px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: white;
    box-shadow: 0 11px 28px rgba(25, 76, 68, 0.07);
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        border-color 0.25s ease;
}

.level-card:hover {
    transform: translateY(-5px);
    border-color: rgba(15, 157, 120, 0.45);
    box-shadow: 0 19px 38px rgba(25, 76, 68, 0.12);
}

.level-card.completed {
    border-color: rgba(15, 157, 120, 0.5);
    background:
        linear-gradient(
            145deg,
            rgba(232, 248, 242, 0.72),
            white
        );
}

.level-card.locked {
    opacity: 0.65;
}

.level-card.locked:hover {
    transform: none;
    box-shadow: 0 11px 28px rgba(25, 76, 68, 0.07);
}

.level-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 15px;
}

.level-icon {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    border-radius: 18px;
    background: var(--light-green);
    font-size: 1.75rem;
    animation: softFloat 3.5s ease-in-out infinite;
}

.level-number {
    padding: 7px 11px;
    border-radius: 999px;
    color: var(--dark-green);
    background: var(--light-green);
    font-size: 0.68rem;
    font-weight: 900;
}

.level-card h3 {
    margin-top: 17px;
    color: var(--navy);
    font-size: 1.35rem;
}

.level-card-description {
    min-height: 48px;
    margin-top: 8px;
    color: var(--muted);
    font-size: 0.81rem;
    line-height: 1.65;
}

.level-details {
    margin-top: 17px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.detail-chip,
.rank-badge,
.reward-chip {
    padding: 7px 10px;
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 900;
}

.detail-chip {
    color: #5d6e80;
    background: #f1f5f7;
}

.reward-chip {
    color: #785d16;
    background: #fff2c7;
}

.level-card-action {
    width: 100%;
    margin-top: 19px;
}

.lock-message {
    margin-top: 12px;
    color: var(--muted);
    font-size: 0.71rem;
    text-align: center;
}

.lesson-heading {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
}

.lesson-heading-copy {
    flex: 1;
}

.back-link {
    margin-bottom: 15px;
    display: inline-flex;
    color: var(--green);
    font-size: 0.8rem;
    font-weight: 900;
    text-decoration: none;
}

.lesson-layout {
    margin-top: 31px;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: 22px;
}

.study-panel,
.quiz-panel {
    padding: 26px;
}

.study-panel h2,
.quiz-panel h2 {
    color: var(--navy);
    font-size: 1.55rem;
}

.study-description,
.quiz-description {
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.7;
}

.selected-display {
    min-height: 175px;
    margin-top: 20px;
    padding: 25px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 22px;
    text-align: center;
    background:
        radial-gradient(
            circle at top,
            rgba(15, 157, 120, 0.13),
            transparent 45%
        ),
        #fbfefd;
}

.selected-symbol {
    color: var(--navy);
    font-size: clamp(4rem, 11vw, 7rem);
    line-height: 1;
}

.selected-display h3 {
    margin-top: 12px;
    color: var(--green);
    font-size: 1.25rem;
}

.selected-display p {
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.78rem;
    line-height: 1.6;
}

.explorer-grid {
    margin-top: 19px;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.explorer-button {
    min-height: 59px;
    padding: 7px;
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--navy);
    background: #f4fbf8;
    cursor: pointer;
    font-size: 1.4rem;
    font-weight: 800;
    transition:
        transform 0.2s ease,
        color 0.2s ease,
        background 0.2s ease;
}

.explorer-button:hover,
.explorer-button.active {
    color: white;
    background: var(--green);
    transform: translateY(-3px) scale(1.03);
}

.resource-link {
    margin-top: 17px;
}

.question-counter {
    color: var(--green);
    font-size: 0.72rem;
    font-weight: 900;
}

.question-text {
    min-height: 68px;
    margin-top: 14px;
    color: var(--navy);
    font-size: 1.25rem;
    line-height: 1.5;
}

.option-grid {
    margin-top: 18px;
    display: grid;
    gap: 10px;
}

.option-button {
    min-height: 50px;
    padding: 12px 14px;
    border: 2px solid var(--border);
    border-radius: 14px;
    color: var(--navy);
    background: white;
    cursor: pointer;
    font-weight: 800;
    text-align: left;
    transition:
        border-color 0.2s ease,
        background 0.2s ease,
        transform 0.2s ease;
}

.option-button:hover {
    border-color: var(--green);
    transform: translateX(3px);
}

.option-button.correct {
    border-color: var(--green);
    color: var(--dark-green);
    background: var(--light-green);
}

.option-button.wrong {
    border-color: var(--danger);
    color: var(--danger);
    background: #fff0f0;
}

.option-button:disabled {
    cursor: default;
    transform: none;
}

.quiz-feedback {
    min-height: 46px;
    margin-top: 15px;
    padding: 12px 14px;
    border-radius: 13px;
    color: var(--muted);
    background: #f3f7f8;
    font-size: 0.78rem;
    line-height: 1.55;
}

.quiz-feedback.correct {
    color: var(--dark-green);
    background: var(--light-green);
}

.quiz-feedback.wrong {
    color: var(--danger);
    background: #fff0f0;
}

.quiz-actions {
    margin-top: 16px;
    display: flex;
    gap: 10px;
}

.completion-panel {
    display: none;
    padding: 28px;
    text-align: center;
}

.completion-panel.show {
    display: block;
    animation: popIn 0.45s ease both;
}

.completion-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto;
    display: grid;
    place-items: center;
    border-radius: 29px;
    background: var(--light-green);
    font-size: 2.8rem;
}

.completion-panel h2 {
    margin-top: 17px;
    color: var(--navy);
    font-size: 2rem;
}

.completion-panel p {
    margin-top: 9px;
    color: var(--muted);
    line-height: 1.7;
}

.reward-result {
    margin-top: 19px;
    padding: 18px;
    border-radius: 18px;
    color: #765a16;
    background: #fff3c9;
    font-weight: 900;
}

.completion-buttons {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.podium-grid {
    margin-top: 35px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    align-items: end;
    gap: 14px;
}

.podium-card {
    padding: 22px 15px;
    border: 1px solid var(--border);
    border-radius: 23px;
    text-align: center;
    background: white;
    box-shadow: 0 11px 28px rgba(25, 76, 68, 0.08);
}

.podium-card.first {
    min-height: 235px;
    border-color: rgba(244, 185, 66, 0.65);
    background: linear-gradient(180deg, #fff9e7, white);
}

.podium-card.second {
    min-height: 205px;
}

.podium-card.third {
    min-height: 185px;
}

.podium-place {
    font-size: 2.1rem;
}

.podium-avatar {
    width: 60px;
    height: 60px;
    margin: 12px auto;
    display: grid;
    place-items: center;
    border-radius: 19px;
    color: white;
    background: linear-gradient(135deg, var(--green), #2563eb);
    font-weight: 900;
}

.podium-card h3 {
    color: var(--navy);
    word-break: break-word;
}

.podium-card p {
    margin-top: 7px;
    color: var(--green);
    font-weight: 900;
}

.leaderboard-card {
    margin-top: 22px;
    overflow: hidden;
}

.leaderboard-row {
    padding: 15px 20px;
    display: grid;
    grid-template-columns: 65px 1fr 135px 100px;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.leaderboard-row:last-child {
    border-bottom: 0;
}

.leaderboard-row.header {
    color: var(--muted);
    background: #f4f8f7;
    font-size: 0.7rem;
    font-weight: 900;
    text-transform: uppercase;
}

.leaderboard-row.current-user {
    background: var(--light-green);
}

.leader-name {
    display: flex;
    align-items: center;
    gap: 11px;
    min-width: 0;
    color: var(--navy);
    font-weight: 900;
}

.leader-name-avatar {
    width: 39px;
    height: 39px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    border-radius: 12px;
    color: white;
    background: linear-gradient(135deg, var(--green), #2563eb);
    font-size: 0.72rem;
}

.leader-name span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rank-badge {
    display: inline-flex;
    width: fit-content;
    color: var(--dark-green);
    background: var(--light-green);
}

.reward-grid {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.reward-card {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 21px;
    background: white;
    transition:
        transform 0.2s ease,
        border-color 0.2s ease;
}

.reward-card.unlocked:hover {
    transform: translateY(-4px);
    border-color: var(--green);
}

.reward-card.locked {
    opacity: 0.55;
}

.reward-card-icon {
    font-size: 2.2rem;
}

.reward-card h3 {
    margin-top: 12px;
    color: var(--navy);
}

.reward-card p {
    min-height: 44px;
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.77rem;
    line-height: 1.55;
}

.reward-card .button {
    width: 100%;
    margin-top: 15px;
}

.game-shell {
    margin-top: 25px;
    padding: 23px;
}

.game-header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
}

.game-header h2 {
    color: var(--navy);
}

.game-header p {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.78rem;
}

.game-stats {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.game-stat {
    padding: 8px 12px;
    border-radius: 12px;
    color: var(--dark-green);
    background: var(--light-green);
    font-size: 0.75rem;
    font-weight: 900;
}

.game-canvas-wrapper {
    margin-top: 18px;
    overflow: hidden;
    border-radius: 20px;
    background: var(--navy);
}

#gameCanvas {
    width: 100%;
    height: auto;
    display: block;
    touch-action: none;
}

.game-message {
    min-height: 44px;
    margin-top: 13px;
    padding: 12px 14px;
    border-radius: 13px;
    color: var(--muted);
    background: #f3f7f8;
    font-size: 0.8rem;
    line-height: 1.55;
}

.game-controls {
    margin-top: 14px;
    display: grid;
    grid-template-columns: 1fr 1fr 1.2fr;
    gap: 9px;
}

.game-control-button {
    min-height: 54px;
    border: 0;
    border-radius: 15px;
    color: var(--navy);
    background: var(--light-green);
    cursor: pointer;
    font-size: 1.15rem;
    font-weight: 900;
    user-select: none;
}

.account-summary {
    margin-top: 28px;
    padding: 28px;
}

.account-main {
    display: flex;
    align-items: center;
    gap: 18px;
}

.account-main h2 {
    color: var(--navy);
}

.account-email {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.8rem;
}

.account-action-grid {
    margin-top: 25px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 11px;
}

.empty-state {
    padding: 45px 20px;
    color: var(--muted);
    text-align: center;
    line-height: 1.7;
}

.toast {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 3000;
    max-width: min(390px, calc(100% - 40px));
    padding: 14px 17px;
    border-radius: 16px;
    color: white;
    background: var(--navy);
    box-shadow: 0 18px 35px rgba(24, 53, 87, 0.25);
    font-size: 0.82rem;
    font-weight: 800;
    opacity: 0;
    pointer-events: none;
    transform: translateY(15px);
}

.toast.show {
    animation: toastShow 2.8s ease forwards;
}

.emoji-layer {
    position: fixed;
    inset: 0;
    z-index: 2500;
    overflow: hidden;
    pointer-events: none;
}

.emoji-burst {
    position: absolute;
    left: var(--left);
    top: var(--top);
    font-size: var(--size);
    animation: emojiBurst 1.4s ease-out forwards;
}

.hidden {
    display: none !important;
}

@keyframes pageFade {
    from {
        opacity: 0;
        transform: translateY(13px);
    }

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

@keyframes softFloat {
    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.87);
    }

    75% {
        transform: scale(1.03);
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes emojiBurst {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.4) rotate(0deg);
    }

    20% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform:
            translateY(-150px)
            translateX(var(--drift))
            scale(1.3)
            rotate(220deg);
    }
}

@keyframes toastShow {
    0% {
        opacity: 0;
        transform: translateY(15px);
    }

    12%,
    82% {
        opacity: 1;
        transform: translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateY(-10px);
    }
}

@media (max-width: 900px) {
    .hero-grid,
    .lesson-layout {
        grid-template-columns: 1fr;
    }

    .reward-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .account-action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 680px) {
    .academy-header {
        position: static;
        padding: 13px 4%;
        align-items: flex-start;
        flex-direction: column;
    }

    .academy-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .academy-nav a {
        padding: 8px 9px;
        font-size: 0.73rem;
    }

    .page-shell {
        padding: 42px 15px 75px;
    }

    .level-grid,
    .reward-grid {
        grid-template-columns: 1fr;
    }

    .stat-grid {
        grid-template-columns: 1fr 1fr;
    }

    .explorer-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .podium-grid {
        grid-template-columns: 1fr;
    }

    .podium-card,
    .podium-card.first,
    .podium-card.second,
    .podium-card.third {
        min-height: auto;
    }

    .leaderboard-row {
        grid-template-columns: 42px 1fr 80px;
        padding: 13px 12px;
    }

    .leaderboard-row > :nth-child(3) {
        display: none;
    }

    .leaderboard-row.header > :nth-child(3) {
        display: none;
    }

    .game-header {
        flex-direction: column;
    }

    .game-controls {
        grid-template-columns: 1fr 1fr;
    }

    .game-controls .button {
        grid-column: 1 / -1;
    }

    .account-main {
        align-items: flex-start;
    }

    .account-action-grid {
        grid-template-columns: 1fr;
    }
}