/* Reset and base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', 'Noto Sans JP', sans-serif;
}

html,
body {
    overflow-x: hidden;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

body.transition-out {
    opacity: 0;
    transform: scale(0.98) translateY(10px);
}

body.modal-open {
    overflow: hidden;
}

/* Header */
header {
    background: var(--card-bg);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

/* ================= Navbar ================= */
.main-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
    background: var(--card-bg);
    backdrop-filter: blur(10px) saturate(120%);
    -webkit-backdrop-filter: blur(10px) saturate(120%);
    border-bottom: 1px solid var(--card-border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 2000;
}

/* ================= App Title ================= */
.navbar-left .app-title a {
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    font-size: 1.9rem;
    color: var(--primary-color);
    text-decoration: none;
    transition: transform 0.4s ease, text-shadow 0.8s ease;
    outline: none;
}

.navbar-left .app-title a:hover {
    transform: translateY(-0.7px) scale(1.02);

    /* Slightly stronger but still soft hover glow */
    text-shadow:
        0 0 2px var(--accent-color),
        0 0 4px var(--accent-color),
        0 0 6px var(--primary-color);
}

/* FAB wrapper */
.action-btn-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Main action button */
.settings-btn {
    font-size: 1.6rem;
    color: var(--primary-color);
    background: none;
    border: none;
    cursor: pointer;
    transition: transform 0.3s ease, color 0.3s ease, text-shadow 0.3s ease;
}

.settings-btn:hover {
    color: var(--accent-color);
}

/* Animation when menu is open (clicked) */
.settings-btn.menu-open {
    transform: rotate(90deg) scale(1.0);
}

/* Sub-actions hidden by default */
.sub-actions {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    position: absolute;
    top: 60px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Show sub-actions when wrapper active */
.action-btn-wrapper.active .sub-actions {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* Sub-action buttons */
.sub-action {
    font-size: 1.4rem;
    color: var(--primary-color);
    background: var(--card-bg);
    border: none;
    border-radius: 12px;
    padding: 0.6rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.sub-action:hover {
    color: var(--accent-color);
    transform: scale(1.2);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

#loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-color), var(--card-bg));
    z-index: 9999;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.loader .dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    animation: bounce 0.6s infinite alternate;
}

.loader .dot1 {
    animation-delay: 0s;
}

.loader .dot2 {
    animation-delay: 0.2s;
}

.loader .dot3 {
    animation-delay: 0.4s;
}

.loader-orbit {
    position: relative;
    width: 120px;
    height: 120px;
    margin-bottom: 1rem;
    animation: rotateOrbit 2s linear infinite;
}

.loader-orbit .dot {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-color), 0 0 30px var(--accent-color);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(0deg) translateX(50px);
}

.loader-orbit .dot1 {
    animation: orbit 2s linear infinite;
    animation-delay: 0s;
}

.loader-orbit .dot2 {
    animation: orbit 2s linear infinite;
    animation-delay: 0.2s;
}

.loader-orbit .dot3 {
    animation: orbit 2s linear infinite;
    animation-delay: 0.4s;
}

.loader-orbit .dot4 {
    animation: orbit 2s linear infinite;
    animation-delay: 0.6s;
}

.loader-orbit .dot5 {
    animation: orbit 2s linear infinite;
    animation-delay: 0.8s;
}

.loading-text {
    font-family: 'Outfit', 'Noto Sans JP', sans-serif;
    color: var(--accent-color);
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    text-shadow: 0 0 10px var(--accent-color), 0 0 20px rgba(255, 255, 255, 0.1);
    animation: fadePulse 1.8s ease-in-out infinite;
}

.header-btn {
    cursor: pointer;
    background: transparent;
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    padding: 0.5rem 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.header-btn:hover {
    background-color: var(--primary-color);
    color: #fff;
    transform: scale(1.05);
}

/* Container and Kanji Cards */
.container {
    margin: 4rem auto;
    padding: 3rem 2.5rem;
    min-width: 600px;
    max-width: auto;
    border-radius: 32px;
    text-align: center;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: transform 0.3s ease, box-shadow 0.4s ease, background 0.5s ease, opacity 0.4s ease;
    background: var(--card-bg);
    border: 1px solid rgba(var(--accent-color-rgb, 163, 210, 202), 0.2);
    box-shadow: 0 10px 20px rgba(var(--accent-color-rgb, 163, 210, 202), 0.15),
        0 20px 40px rgba(0, 0, 0, 0.05);
    background-image: linear-gradient(135deg,
            rgba(var(--accent-color-rgb, 163, 210, 202), 0.03),
            rgba(var(--accent-color-rgb, 163, 210, 202), 0.06));
}

.container.hidden {
    transform: translateY(50px);
    opacity: 0;
    pointer-events: none;
}

body.theme-tsukizumi .container,
body.theme-uminami .container,
body.theme-mithril .container,
body.theme-orange .container,
body.theme-violet-night .container,
body.theme-celestial .container {
    background-image: none;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(var(--accent-color-rgb, 163, 210, 202), 0.15);
}

.container.pulse {
    animation: container-pulse 6s ease-in-out infinite;
}

.kanji-card {
    margin: 2rem auto;
    max-width: auto;
    border-radius: 24px;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    background: linear-gradient(135deg,
            var(--card-gradient-color, rgba(255, 255, 255, 0.03)),
            var(--card-bg));
    border: 1px solid var(--card-border-color, rgba(255, 255, 255, 0.05));
    box-shadow: 0 6px 16px var(--card-shadow-color, rgba(0, 0, 0, 0.08));
}

/* Ruby wrapper inside container */
.ruby-wrapper {
    display: flex;
    justify-content: center;
    gap: 0rem;
    text-align: center;
}

.kanji-container {
    min-width: 600px;
    display: flex;
    justify-content: center;
    gap: 0rem;
    margin: 1rem 0;
    text-align: center;
}

ruby.kanji-char {
    margin-top: -1rem;
    font-size: 4rem;
    color: var(--primary-color);
    line-height: 1.2;
    cursor: pointer;
    transition: text-shadow 0.3s ease;
    display: inline-flex;
    flex-direction: column-reverse;
    align-items: center;
}

ruby.kanji-char:hover {
    text-shadow: 0 0 5px var(--accent-color),
        0 0 10px var(--accent-color),
        0 0 20px var(--primary-color);
}

ruby.kanji-char rt {
    font-size: 1rem;
    color: var(--hint-color);
    font-weight: 600;
    line-height: 1.5rem;
    display: block;
    transform: translateX(0px);
    user-select: none;
    visibility: hidden;
}

input[type="text"] {
    width: 100%;
    padding: 0.9rem;
    font-size: 1.05rem;
    border: 1px solid var(--input-border);
    border-radius: 12px;
    margin-top: 1rem;
    margin-bottom: 1.5rem;

    /* Use a "flat gradient" so transitions stay smooth */
    background: linear-gradient(145deg,
            var(--input-bg),
            var(--input-bg));

    color: var(--text-color);
    transition: all 0.4s ease;
    outline: none;
    position: relative;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--input-border-focus);

    /* Gradient with subtle highlight only on focus */
    background: linear-gradient(145deg,
            var(--input-bg),
            rgba(255, 255, 255, 0.02));

    color: var(--text-color);

    box-shadow:
        0 0 0 3px rgba(var(--accent-color-rgb), 0.2),
        0 0 12px 2px var(--accent-color),
        0 0 10px 6px rgba(var(--accent-color-rgb), 0.15),
        0 4px 15px rgba(var(--accent-color-rgb), 0.2),
        inset 0 1px 3px rgba(0, 0, 0, 0.4),
        inset 0 1px 4px rgba(255, 255, 255, 0.15);

    transform: scale(1.01);
    transition: all 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}

input[type="text"]::placeholder {
    color: var(--placeholder-color);
    transition: color 0.5s ease;
}

input[type="text"]:focus::placeholder {
    color: var(--placeholder-color);
}

.controls {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1rem;
}

.controls button {
    flex: 1;
    min-width: 160px;
    padding: 1.1rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--button-bg);
    color: var(--primary-color);
    box-shadow: 0 4px 12px var(--input-box-shadow);
    transition: transform 0.2s ease, background 0.3s ease, color 0.3s ease;
    user-select: none;
}

.controls button:hover {
    background: var(--accent-color);
    color: #fff;
    transform: translateY(-1px);
}

.scoreboard {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 3rem;
    border-top: 2px dashed var(--input-border);
    border-bottom: 2px dashed var(--input-border);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin-top: -1rem;
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.score-label {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 0.2rem;
}

.score-value {
    font-size: 1rem;
    color: var(--primary-color);
}

#wrong-score-item {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

/* Responsive */
@media (max-width: 600px) {
    .controls {
        flex-direction: column;
    }
}

/* Responsive Navbar */
@media (max-width: 900px) {
    .navbar-center {
        display: none;
    }
}

@media (max-width: 600px) {
    .main-navbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
    }

    .navbar-left,
    .navbar-right {
        width: 100%;
        display: flex;
        justify-content: space-between;
        margin-bottom: 0.5rem;
    }
}