/* Page-owned styles for /duel/ */
.duel-page {
    background-color: var(--color-obsidian-blue);
    background-image: radial-gradient(circle at 20% 20%, rgba(46, 196, 182, 0.04), transparent 40%),
                      radial-gradient(circle at 80% 60%, rgba(155, 89, 182, 0.05), transparent 45%);
}

/* Section alternation */
.duel-page .section--alt {
    background-color: var(--color-dark-blue-marble);
}

/* Intro */
.duel-intro__inner {
    max-width: 800px;
    margin-inline: auto;
    text-align: left;
}

.duel-intro__title {
    margin-block-end: var(--space-lg);
}

.duel-intro__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.duel-intro__lead {
    margin-block-end: 0;
}

.duel-intro__facts {
    margin-block-end: 0;
}

/* Phases */
.duel-phases__title {
    margin-block-end: var(--space-xl);
}

.duel-phases__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--space-2xl);
    align-items: start;
}

.duel-phases__list {
    min-width: 0;
}

.duel-phases__intro {
    margin-block-end: var(--space-lg);
}

.duel-phases__items {
    list-style: none;
    padding-inline-start: 0;
    margin-block-end: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.duel-phase-item {
    padding: var(--space-md);
    background-color: rgba(11, 16, 38, 0.6);
    border: 1px solid var(--color-border-bronze);
    border-radius: var(--radius-medium);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.duel-phase-item:hover {
    border-color: var(--color-turquoise-glass);
    box-shadow: var(--shadow-glow-turquoise);
    transform: translateY(-2px);
}

.duel-phases__visual {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.duel-phases__visual-inner {
    width: 100%;
    aspect-ratio: 1 / 1;
    max-width: 280px;
    background: linear-gradient(145deg, var(--color-dark-blue-marble), var(--color-obsidian-blue));
    border: 1px solid var(--color-border-bronze);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.duel-phases__visual-label {
    font-family: var(--font-heading);
    font-size: var(--text-h3-size);
    letter-spacing: var(--text-heading-letter-spacing);
    text-transform: uppercase;
    color: var(--color-ancient-bronze);
    text-align: center;
}

.duel-phases__visual-icon {
    width: 64px;
    height: 64px;
    border: 2px solid var(--color-turquoise-glass);
    border-radius: 50%;
    box-shadow: 0 0 16px rgba(46, 196, 182, 0.35);
    position: relative;
}

.duel-phases__visual-icon::before,
.duel-phases__visual-icon::after {
    content: "";
    position: absolute;
    background-color: var(--color-turquoise-glass);
}

.duel-phases__visual-icon::before {
    width: 2px;
    height: 24px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.duel-phases__visual-icon::after {
    width: 24px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Summoning */
.duel-summoning__title {
    margin-block-end: var(--space-xl);
}

.duel-summoning__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--card-gutter);
}

.duel-summon-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.duel-summon-card h3 {
    margin-block-end: 0;
}

.duel-summon-card p {
    margin-block-end: 0;
}

.duel-summon-card .content-list {
    margin-block-end: 0;
}

/* Battle */
.duel-battle__title {
    margin-block-end: var(--space-xl);
}

.duel-battle__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--space-2xl);
    align-items: start;
}

.duel-battle__text {
    min-width: 0;
}

.duel-battle__text h3 {
    margin-block-start: var(--space-lg);
}

.duel-battle__text h3:first-child {
    margin-block-start: 0;
}

.duel-battle__diagram {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.duel-battle__diagram-inner {
    width: 100%;
    aspect-ratio: 1 / 1;
    max-width: 280px;
    background: linear-gradient(145deg, var(--color-dark-blue-marble), var(--color-obsidian-blue));
    border: 1px solid var(--color-border-bronze);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.duel-battle__diagram-label {
    font-family: var(--font-heading);
    font-size: var(--text-h3-size);
    letter-spacing: var(--text-heading-letter-spacing);
    text-transform: uppercase;
    color: var(--color-ancient-bronze);
    text-align: center;
}

.duel-battle__diagram-icon {
    width: 64px;
    height: 64px;
    border: 2px solid var(--color-ember-copper);
    border-radius: 50%;
    box-shadow: 0 0 16px rgba(211, 84, 0, 0.35);
    position: relative;
}

.duel-battle__diagram-icon::before,
.duel-battle__diagram-icon::after {
    content: "";
    position: absolute;
    background-color: var(--color-ember-copper);
}

.duel-battle__diagram-icon::before {
    width: 2px;
    height: 24px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.duel-battle__diagram-icon::after {
    width: 24px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Tips */
.duel-tips__inner {
    max-width: 800px;
    margin-inline: auto;
    text-align: left;
}

.duel-tips__title {
    margin-block-end: var(--space-lg);
}

.duel-tips__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.duel-tips__lead {
    margin-block-end: 0;
}

.duel-tips__list {
    margin-block-end: 0;
}

/* Strategies */
.duel-strategies__title {
    margin-block-end: var(--space-xl);
}

.duel-strategies__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--card-gutter);
}

.duel-strategy-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.duel-strategy-card h3 {
    margin-block-end: 0;
}

.duel-strategy-card p {
    margin-block-end: 0;
}

.duel-strategies__note {
    margin-block-start: var(--space-lg);
    font-size: var(--text-caption-size);
    color: var(--color-ancient-bronze);
    font-style: italic;
}

/* Mistakes */
.duel-mistakes__inner {
    max-width: 800px;
    margin-inline: auto;
    text-align: left;
}

.duel-mistakes__title {
    margin-block-end: var(--space-lg);
}

.duel-mistakes__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.duel-mistakes__lead {
    margin-block-end: 0;
}

.duel-mistakes__list {
    margin-block-end: 0;
}

/* FAQ */
.duel-faq__inner {
    max-width: 800px;
    margin-inline: auto;
    text-align: left;
}

.duel-faq__title {
    margin-block-end: var(--space-xl);
}

.duel-faq__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.duel-faq__item {
    border: 1px solid var(--color-border-bronze);
    border-radius: var(--radius-medium);
    background-color: rgba(11, 16, 38, 0.6);
    overflow: hidden;
}

.duel-faq__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-heading);
    font-size: var(--text-body-size);
    letter-spacing: var(--text-heading-letter-spacing);
    text-transform: uppercase;
    color: var(--color-ancient-bronze);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    min-height: var(--touch-target-min);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.duel-faq__question:hover {
    color: var(--color-turquoise-glass);
    background-color: rgba(46, 196, 182, 0.05);
}

.duel-faq__icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    position: relative;
}

.duel-faq__icon::before,
.duel-faq__icon::after {
    content: "";
    position: absolute;
    background-color: currentColor;
    transition: transform var(--transition-fast);
}

.duel-faq__icon::before {
    width: 100%;
    height: 2px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.duel-faq__icon::after {
    width: 2px;
    height: 100%;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.duel-faq__item.is-open .duel-faq__icon::after {
    transform: translateX(-50%) scaleY(0);
}

.duel-faq__answer {
    padding: 0 var(--space-lg) var(--space-lg);
}

.duel-faq__answer p {
    margin-block-end: 0;
}

/* Resources */
.duel-resources__title {
    margin-block-end: var(--space-lg);
}

.duel-resources__intro {
    margin-block-end: var(--space-xl);
}

.duel-resources__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--card-gutter);
}

.duel-resource-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    color: var(--color-papyrus-ivory);
}

.duel-resource-card:hover {
    color: var(--color-papyrus-ivory);
}

.duel-resource-card h3 {
    margin-block-end: 0;
}

.duel-resource-card p {
    margin-block-end: 0;
}

/* Update */
.duel-update__inner {
    max-width: 800px;
    margin-inline: auto;
    text-align: left;
}

.duel-update__title {
    margin-block-end: var(--space-md);
}

.duel-update__content p {
    margin-block-end: 0;
    color: var(--color-ancient-bronze);
    font-size: var(--text-caption-size);
}

/* Tablet breakpoint */
@media (max-width: 1024px) {
    .duel-summoning__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

/* Mobile breakpoint */
@media (max-width: 768px) {
    .duel-phases__layout,
    .duel-battle__layout {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .duel-phases__visual,
    .duel-battle__diagram {
        order: 2;
    }

    .duel-phases__list,
    .duel-battle__text {
        order: 1;
    }

    .duel-summoning__grid,
    .duel-strategies__grid,
    .duel-resources__grid {
        grid-template-columns: 1fr;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .duel-intro__inner,
    .duel-tips__inner,
    .duel-mistakes__inner,
    .duel-faq__inner,
    .duel-update__inner {
        padding-inline: var(--space-md);
    }

    .duel-phases__visual-inner,
    .duel-battle__diagram-inner {
        max-width: 100%;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .duel-phase-item,
    .duel-faq__question,
    .duel-faq__icon::before,
    .duel-faq__icon::after {
        transition: none;
    }
}