/* --- Home Page Redesign: Layered Cover --- */
.home-page-container {
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: 1000;
    background: #000;
    font-family: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", "Heiti TC", sans-serif;
}

.home-bg-layer {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center 30%;
    filter: brightness(0.7) blur(1px);
    transform: scale(1.05);
    z-index: 1;
    animation: bg-slow-zoom 20s ease-in-out infinite alternate;
}

@keyframes bg-slow-zoom {
    from {
        transform: scale(1.05);
    }

    to {
        transform: scale(1.15);
    }
}

.home-character-layer {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    pointer-events: none;
}

.home-mentor-shadow {
    position: absolute;
    bottom: 2vh;
    left: 50%;
    transform: translateX(-50%) rotateX(75deg);
    width: 250px;
    height: 60px;
    background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0) 70%);
    z-index: 1;
    opacity: 0;
    animation: fade-in 1.5s 0.2s forwards;
    pointer-events: none;
}

.home-mentor-keyart {
    height: 100vh;
    width: auto;
    object-fit: contain;
    object-position: bottom;
    opacity: 0;
    filter: drop-shadow(0 0 15px rgba(0, 0, 0, 0.7)) drop-shadow(0 0 40px rgba(100, 200, 255, 0.15));
    animation: mentor-fade-in 1.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    transform-origin: bottom center;
    position: relative;
    z-index: 2;
}

/* Desktop override for home page character height and position */
@media (min-width: 901px) {
    .home-mentor-keyart {
        height: 60vh;
        margin-bottom: 5vh;
        transform: translateY(0) scale(1.3) translateX(30%) !important;
        object-position: bottom;
    }
}

@keyframes mentor-fade-in {
    0% {
        opacity: 0;
        transform: translateY(60px) scale(0.95);
    }

    100% {
        opacity: 1;
        transform: translateY(0) scale(1.3) translateX(10%);
    }
}

.home-ui-layer {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 10vh 2rem 8vh;
    text-align: center;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.4) 0%, transparent 40%, transparent 60%, rgba(0, 0, 0, 0.6) 100%);
}

.home-app-version {
    position: absolute;
    top: max(0.75rem, env(safe-area-inset-top, 0px));
    right: max(1rem, env(safe-area-inset-right, 0px));
    z-index: 4;
    font-size: 10px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: rgba(148, 163, 184, 0.88);
    pointer-events: none;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.85);
}

.home-title-box {
    animation: fade-down 1s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes fade-down {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

.home-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: #ffffff;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 1);
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.home-title-accent {
    height: 4px;
    width: 100px;
    background: #f59e0b;
    margin: 0.75rem auto;
    border-radius: 2px;
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.8);
}

.home-title-sub {
    font-size: 1.75rem;
    font-weight: 900;
    color: #f59e0b;
    letter-spacing: 0.5em;
    margin-left: 0.5em;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 1);
}

.home-chinese-subtitle {
    font-size: 1.35rem;
    color: #f8fafc;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 1);
    margin-top: 3vh;
    opacity: 0;
    animation: fade-in 1s 0.8s forwards;
}

@keyframes fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.home-cta-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    animation: fade-up 1s 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.home-start-btn {
    position: relative;
    padding: 1.25rem 5.5rem;
    font-size: 1.75rem;
    font-weight: 900;
    background: linear-gradient(135deg, #b45309 0%, #92400e 100%);
    color: #fef3c7;
    border-radius: 999px;
    border: 1px solid rgba(251, 191, 36, 0.3);
    box-shadow: 0 10px 40px rgba(180, 83, 9, 0.4), inset 0 1px 2px rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    letter-spacing: 0.1em;
}

.home-start-btn:hover {
    transform: scale(1.05) translateY(-5px);
    box-shadow: 0 15px 50px rgba(180, 83, 9, 0.6), inset 0 1px 2px rgba(255, 255, 255, 0.3);
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

.home-start-btn:active {
    transform: scale(0.95) translateY(2px);
}

.home-save-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.home-storage-note {
    max-width: 24rem;
    margin: -0.6rem auto 0;
    color: rgba(226, 232, 240, 0.78);
    font-size: 0.78rem;
    line-height: 1.45;
    text-align: center;
    text-shadow: 0 1px 4px rgba(15, 23, 42, 0.9);
}

.home-save-btn {
    min-width: 9rem;
    padding: 0.75rem 1.25rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background: rgba(15, 23, 42, 0.62);
    color: #f8fafc;
    font-size: 0.95rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.home-save-btn:hover {
    transform: translateY(-2px);
    background: rgba(30, 41, 59, 0.78);
    border-color: rgba(251, 191, 36, 0.45);
}

.save-slot-overlay {
    position: fixed;
    inset: 0;
    z-index: 6500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1rem, 4vw, 2.5rem);
    background:
        linear-gradient(180deg, rgba(15, 23, 42, 0.08), rgba(2, 6, 23, 0.22)),
        rgba(2, 6, 23, 0.16);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.save-slot-panel {
    position: relative;
    isolation: isolate;
    width: min(980px, 100%);
    max-height: min(88dvh, 760px);
    overflow-y: auto;
    border: 2px solid rgba(255, 255, 255, 0.18);
    border-radius: 2rem;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(32px) saturate(180%);
    -webkit-backdrop-filter: blur(32px) saturate(180%);
    box-shadow:
        0 24px 48px rgba(0, 0, 0, 0.8),
        inset 0 2px 0 rgba(255, 255, 255, 0.25),
        inset 0 -3px 6px rgba(0, 0, 0, 0.35),
        inset 0 0 0 8px rgba(255, 255, 255, 0.02);
    padding: clamp(1rem, 2.8vw, 1.5rem);
    color: #f8fafc;
}

.save-slot-panel::before,
.save-slot-panel::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
}

.save-slot-panel::before {
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.14) 0%, rgba(255, 255, 255, 0.08) 14%, rgba(255, 255, 255, 0.04) 28%, transparent 48%);
    mix-blend-mode: screen;
}

.save-slot-panel::after {
    background:
        radial-gradient(80% 60% at 0% 0%, rgba(236, 253, 255, 0.12) 0%, transparent 60%),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.04) 22%, transparent 36%),
        linear-gradient(to top, rgba(0, 0, 0, 0.18), transparent 35%);
    mix-blend-mode: screen;
}

.save-slot-panel-header {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.1rem;
    padding: 0.6rem 0.25rem 1rem;
    border-radius: inherit;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.05), transparent 92%);
}

.save-slot-title {
    margin: 0;
    color: #fde68a;
    font-size: clamp(1.45rem, 3vw, 1.8rem);
    font-weight: 900;
    letter-spacing: 0.08em;
    text-shadow: 0 0 16px rgba(251, 191, 36, 0.25), 0 2px 10px rgba(0, 0, 0, 0.5);
}

.save-slot-subtitle {
    margin: 0.25rem 0 0;
    color: rgba(226, 232, 240, 0.72);
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.save-slot-close {
    flex: 0 0 auto;
    width: 2.45rem;
    height: 2.45rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.24);
    background:
        linear-gradient(to bottom, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.04)),
        rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.74);
    font-size: 1.5rem;
    line-height: 1;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14), 0 10px 20px rgba(0, 0, 0, 0.22);
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.save-slot-close:hover {
    transform: translateY(-1px);
    border-color: rgba(251, 191, 36, 0.5);
    background:
        linear-gradient(to bottom, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05)),
        rgba(255, 255, 255, 0.08);
    color: #fde68a;
}

.save-slot-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.85rem;
}

.save-slot-card {
    position: relative;
    isolation: isolate;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 0;
    padding: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 1.35rem;
    background:
        radial-gradient(circle at 12% 10%, rgba(125, 211, 252, 0.13), transparent 54%),
        rgba(255, 255, 255, 0.055);
    color: #f8fafc;
    text-align: left;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 10px 24px rgba(0, 0, 0, 0.18);
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.save-slot-card-main {
    display: grid;
    grid-template-columns: minmax(5.75rem, 0.54fr) minmax(25rem, 3fr) minmax(4.5rem, 0.34fr);
    align-items: center;
    gap: 0.9rem;
}

.save-slot-card::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    border-radius: inherit;
    background:
        linear-gradient(to bottom, rgba(255, 255, 255, 0.08), transparent 42%),
        radial-gradient(80% 70% at 0% 0%, rgba(236, 253, 255, 0.08), transparent 58%);
    opacity: 1;
    pointer-events: none;
}

.save-slot-card:hover,
.save-slot-card.is-active {
    transform: translateY(-3px);
    border-color: rgba(251, 191, 36, 0.64);
    background:
        radial-gradient(circle at 12% 10%, rgba(125, 211, 252, 0.2), transparent 54%),
        rgba(255, 255, 255, 0.085);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.12),
        0 14px 30px rgba(0, 0, 0, 0.24),
        0 0 20px rgba(251, 191, 36, 0.12);
}

.save-slot-card.is-active {
    border-color: rgba(251, 191, 36, 0.82);
    box-shadow:
        0 20px 44px rgba(0, 0, 0, 0.38),
        0 0 0 1px rgba(251, 191, 36, 0.18),
        0 0 26px rgba(251, 191, 36, 0.18),
        inset 0 1px 0 rgba(255, 255, 255, 0.17);
}

.save-slot-card.is-empty {
    border-color: rgba(255, 255, 255, 0.12);
    background:
        radial-gradient(circle at 12% 10%, rgba(226, 232, 240, 0.08), transparent 54%),
        rgba(255, 255, 255, 0.035);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.055),
        0 10px 22px rgba(0, 0, 0, 0.16);
}

.save-slot-card.is-empty::before {
    opacity: 0.34;
}

.save-slot-card-top {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-width: 0;
}

.save-slot-name {
    color: #fff7ed;
    font-size: clamp(1.08rem, 2.2vw, 1.28rem);
    font-weight: 900;
    letter-spacing: 0.04em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.42);
}

.save-slot-status {
    flex-shrink: 0;
    padding: 0.28rem 0.64rem;
    border-radius: 999px;
    border: 1px solid rgba(251, 191, 36, 0.34);
    background:
        linear-gradient(180deg, rgba(251, 191, 36, 0.2), rgba(251, 191, 36, 0.08)),
        rgba(15, 23, 42, 0.54);
    color: #fde68a;
    font-size: 0.72rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: 0.08em;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.save-slot-card.is-empty .save-slot-status {
    border-color: rgba(203, 213, 225, 0.28);
    background:
        linear-gradient(180deg, rgba(148, 163, 184, 0.14), rgba(148, 163, 184, 0.05)),
        rgba(15, 23, 42, 0.48);
    color: rgba(226, 232, 240, 0.74);
}

.save-slot-summary {
    display: grid;
    grid-template-columns: 0.7fr 0.9fr 1.25fr 1.15fr;
    align-items: center;
    gap: 0.9rem;
    padding: 0.58rem 0.6rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: rgba(226, 232, 240, 0.9);
    font-size: 0.96rem;
    line-height: 1.35;
    box-shadow: none;
}

.save-slot-summary span {
    display: flex;
    justify-content: flex-start;
    gap: 0;
    min-width: 0;
}

.save-slot-summary strong {
    color: rgba(248, 250, 252, 0.96);
    font-weight: 600;
    text-align: left;
    white-space: nowrap;
    letter-spacing: 0.01em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.36);
}

.save-slot-actions-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 2.35rem;
}

.save-slot-delete-btn {
    min-height: 1.85rem;
    min-width: 4.25rem;
    padding: 0.25rem 0.85rem;
    border: 1px solid rgba(185, 28, 28, 0.26);
    border-radius: 999px;
    background:
        linear-gradient(180deg, rgba(127, 29, 29, 0.12), rgba(69, 10, 10, 0.2)),
        rgba(15, 23, 42, 0.34);
    color: rgba(254, 202, 202, 0.68);
    font-size: 0.72rem;
    font-weight: 700;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 5px 12px rgba(0, 0, 0, 0.14);
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.save-slot-delete-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(248, 113, 113, 0.52);
    background:
        linear-gradient(180deg, rgba(127, 29, 29, 0.28), rgba(69, 10, 10, 0.36)),
        rgba(15, 23, 42, 0.54);
    color: rgba(254, 226, 226, 0.92);
}

.save-slot-delete-confirm {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.7rem;
    padding: 0.5rem 0.65rem;
    border: 1px solid rgba(248, 113, 113, 0.28);
    border-radius: 0.85rem;
    background:
        radial-gradient(circle at 12% 10%, rgba(248, 113, 113, 0.1), transparent 54%),
        rgba(255, 255, 255, 0.04);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.055),
        0 6px 14px rgba(69, 10, 10, 0.12);
}

.save-slot-delete-confirm p {
    margin: 0;
    color: #fee2e2;
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1.35;
}

.save-slot-delete-actions {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.save-slot-delete-confirm-btn,
.save-slot-delete-cancel-btn {
    flex: 1;
    min-height: 1.85rem;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, filter 0.18s ease, border-color 0.18s ease;
}

.save-slot-delete-confirm-btn:hover,
.save-slot-delete-cancel-btn:hover {
    transform: translateY(-1px);
}

.save-slot-delete-confirm-btn {
    border: 1px solid rgba(248, 113, 113, 0.55);
    background:
        linear-gradient(180deg, rgba(185, 28, 28, 0.72), rgba(127, 29, 29, 0.72));
    color: #ffffff;
    box-shadow: 0 5px 12px rgba(127, 29, 29, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.14);
}

.save-slot-delete-cancel-btn {
    border: 1px solid rgba(148, 163, 184, 0.38);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03)),
        rgba(15, 23, 42, 0.72);
    color: #f8fafc;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.home-cta-label {
    font-size: 10px;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.4em;
    text-transform: uppercase;
    text-indent: 0.4em;
}

/* ── Landscape Adjustments for Cover ── */
/* Refines the typography and spacing to reduce visual oppression on iPads/tablets in landscape */
@media (orientation: landscape) {
    .home-ui-layer {
        padding: 12vh 2rem 6vh;
    }

    .home-title {
        font-size: clamp(2.2rem, 5vw, 2.8rem);
        margin-bottom: 0.1rem;
    }

    .home-title-accent {
        height: 3px;
        width: 80px;
        margin: 0.5rem auto;
    }

    .home-title-sub {
        font-size: clamp(1.2rem, 3vw, 1.5rem);
        letter-spacing: 0.6em;
        /* Slightly looser for elegance */
    }

    .home-chinese-subtitle {
        font-size: 1.15rem;
        margin-top: 2.5vh;
        letter-spacing: 0.35em;
    }

    .home-cta-box {
        gap: 1.2rem;
    }

    .home-start-btn {
        padding: 1rem 4.5rem;
        font-size: 1.45rem;
    }

    .save-slot-panel {
        max-height: 88dvh;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .save-slot-panel {
        width: min(820px, 100%);
    }

    .save-slot-grid {
        grid-template-columns: 1fr;
    }

    .save-slot-card-main {
        grid-template-columns: minmax(6rem, 0.6fr) minmax(16rem, 2fr) minmax(4.25rem, 0.36fr);
        gap: 0.75rem;
    }

    .save-slot-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.5rem 0.75rem;
    }
}

/* Mobile Adjustments for Cover */
@media (max-width: 768px) {
    .home-title {
        font-size: 2.25rem;
    }

    .home-title-sub {
        font-size: 1.1rem;
    }

    .home-mentor-keyart {
        height: 60dvh;
        /* Aggressive: Reduced to 60% for title safety */
        width: auto;
        transform: translateY(0) scale(1.1) translateX(15%);
        object-position: bottom right;
        margin-top: auto;
    }

    .home-start-btn {
        padding: 1rem 4rem;
        font-size: 1.5rem;
    }

    .home-save-actions {
        gap: 0.5rem;
    }

    .home-save-btn {
        min-width: 7.5rem;
        padding: 0.65rem 0.9rem;
        font-size: 0.84rem;
    }

    .save-slot-panel {
        max-height: 88dvh;
        padding: 1rem;
        border-radius: 1.35rem;
    }

    .save-slot-panel-header {
        gap: 0.75rem;
        padding-bottom: 0.75rem;
    }

    .save-slot-title {
        font-size: 1.28rem;
    }

    .save-slot-subtitle {
        font-size: 0.82rem;
    }

    .save-slot-close {
        width: 2.25rem;
        height: 2.25rem;
    }

    .save-slot-grid {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }

    .save-slot-card {
        min-height: 0;
        border-radius: 1.1rem;
        padding: 0.9rem;
    }

    .save-slot-card-main {
        grid-template-columns: 1fr;
        align-items: stretch;
        gap: 0.8rem;
    }

    .save-slot-card-top {
        align-items: flex-start;
        justify-content: flex-start;
    }

    .save-slot-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 0.72rem;
        font-size: 0.9rem;
    }

    .save-slot-summary span {
        gap: 0.5rem;
    }

    .save-slot-summary strong {
        white-space: normal;
    }

    .save-slot-actions-panel {
        display: flex;
        justify-content: flex-start;
        align-items: center;
    }

    .save-slot-delete-btn {
        min-width: 4.25rem;
        padding-inline: 0.85rem;
    }

    .save-slot-delete-confirm {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 0.55rem;
    }

    .save-slot-delete-actions {
        justify-content: flex-start;
    }
}