/* ==========================================================
   TypingTutor.Online
   Integrated Current Lesson + Focused Viewport v17.0.15
   File: css/integrated-current-lesson.css
========================================================== */

/*
 * The current-lesson information now belongs to the active lesson card.
 * Course progress remains separate above it.
 */

.typing-practice-card {
    position: relative;
    display: flex !important;
    min-height: 0 !important;
    height: auto !important;
    flex-direction: column;
    overflow: visible !important;
}

.typing-practice-card > .lesson-focus-bar {
    position: relative;
    display: grid;
    grid-template-columns:
        minmax(220px, .72fr)
        minmax(520px, 1.55fr)
        auto;
    gap: 14px;
    align-items: center;

    width: 100%;
    margin: 0 !important;
    padding: 12px 14px;

    border: 0 !important;
    border-bottom:
        1px solid
        var(--border-color, #dbe3ef) !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
}

.typing-practice-card
.lesson-focus-main {
    min-width: 0;
}

.typing-practice-card
.lesson-focus-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
}

.typing-practice-card
.lesson-focus-title {
    min-width: 0;
}

.typing-practice-card
.lesson-focus-title > span {
    font-size: .68rem;
}

.typing-practice-card
.lesson-focus-title h2 {
    overflow: hidden;
    margin-top: 2px;
    font-size:
        clamp(1rem, 1.45vw, 1.3rem);
    line-height: 1.18;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.typing-practice-card
.lesson-focus-meta {
    display: flex;
    min-width: 0;
    gap: 8px;
    align-items: stretch;
    justify-content: center;
    flex-wrap: nowrap;
}

.typing-practice-card
.lesson-focus-meta > span {
    min-width: 0;
    padding: 8px 10px;
    border-radius: 11px;
    white-space: nowrap;
}

.typing-practice-card
.lesson-focus-meta > span > strong {
    font-size: .64rem;
}

.typing-practice-card
.lesson-focus-progress {
    min-width: 128px !important;
}

.typing-practice-card
.lesson-tips-button {
    min-height: 42px;
    padding: 9px 15px;
    border-radius: 11px;
    white-space: nowrap;
}

/*
 * Tips are anchored to the compact lesson header and do not change the
 * lesson-card height when opened.
 */
.typing-practice-card
.lesson-tips-panel {
    position: absolute;
    z-index: 120;
    top: calc(100% - 4px);
    right: 14px;

    width: min(430px, calc(100vw - 36px));
    max-height: min(460px, 70vh);
    margin: 0 !important;
    padding: 16px;

    overflow-y: auto;

    border:
        1px solid
        var(--border-color, #dbe3ef);
    border-radius: 15px;
    background:
        var(--surface-color, #ffffff);
    box-shadow:
        0 18px 48px
        rgba(15, 23, 42, .18);
}

.typing-practice-card
.lesson-tips-panel[hidden] {
    display: none !important;
}

.typing-practice-card
.lesson-tips-panel p {
    margin: 0;
    padding: 9px 0;
}

.typing-practice-card
.lesson-tips-panel p + p {
    border-top:
        1px solid
        var(--border-color, #e5ebf3);
}

/* Compact stage row after the integrated lesson header. */
.typing-practice-card
.practice-toolbar {
    display: grid !important;
    grid-template-columns:
        minmax(0, 1fr)
        auto
        minmax(0, 1fr);
    min-height: 58px;
    padding: 10px 16px !important;
    align-items: center;
}

.typing-practice-card
.practice-toolbar .stage-label {
    justify-self: start;
}

.typing-practice-card
.practice-toolbar .time-left {
    justify-self: center;
}

/*
 * EXACT DESKTOP VIEWPORT:
 * Three complete lines, without a partial fourth line.
 * Child characters inherit the same line height to prevent drift.
 */
#lessonText {
    --lesson-visible-lines: 3;
    --lesson-exact-line-height: 1.62em;
    --lesson-vertical-padding: 9px;

    box-sizing: border-box !important;

    height:
        calc(
            var(--lesson-visible-lines)
            * var(--lesson-exact-line-height)
            + 2
            * var(--lesson-vertical-padding)
        ) !important;

    min-height:
        calc(
            var(--lesson-visible-lines)
            * var(--lesson-exact-line-height)
            + 2
            * var(--lesson-vertical-padding)
        ) !important;

    max-height:
        calc(
            var(--lesson-visible-lines)
            * var(--lesson-exact-line-height)
            + 2
            * var(--lesson-vertical-padding)
        ) !important;

    margin: 0 !important;
    padding:
        var(--lesson-vertical-padding)
        2.2% !important;

    overflow: hidden !important;
    line-height:
        var(--lesson-exact-line-height) !important;
}

#lessonText
.lesson-character {
    line-height: inherit !important;
}

.typing-practice-card
.practice-footer {
    min-height: 66px;
    padding-top: 9px !important;
    padding-bottom: 9px !important;
}

/*
 * Keep the side statistics beautiful and equal to the new compact card.
 */
.lesson-practice-grid {
    align-items: stretch !important;
}

.lesson-practice-grid
.statistics-panel {
    align-self: stretch;
    grid-template-rows:
        repeat(5, minmax(0, 1fr));
}

.lesson-practice-grid
.statistics-panel .stat {
    min-height: 0;
}

/* Dark mode panel depth */
html[data-theme="dark"]
.typing-practice-card
.lesson-tips-panel {
    background: #111a2b;
    border-color: #2a3a53;
    box-shadow:
        0 20px 55px
        rgba(0, 0, 0, .38);
}

/*
 * Medium desktop: allow lesson metadata to wrap without increasing the
 * separate page height significantly.
 */
@media (max-width: 1180px) {
    .typing-practice-card > .lesson-focus-bar {
        grid-template-columns:
            minmax(220px, 1fr)
            auto;
    }

    .typing-practice-card
    .lesson-focus-meta {
        grid-column: 1 / -1;
        grid-row: 2;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .typing-practice-card
    .lesson-tips-button {
        grid-column: 2;
        grid-row: 1;
    }
}

/*
 * Mobile:
 * - integrated lesson details use two compact rows
 * - exactly two complete typing lines
 * - complete card is allowed to shrink
 */
@media (max-width: 760px) {
    .typing-practice-card > .lesson-focus-bar {
        grid-template-columns:
            minmax(0, 1fr)
            auto;
        gap: 10px;
        padding: 12px;
    }

    .typing-practice-card
    .lesson-focus-main {
        grid-column: 1;
        grid-row: 1;
    }

    .typing-practice-card
    .lesson-tips-button {
        grid-column: 2;
        grid-row: 1;
        min-height: 38px;
        padding: 8px 11px;
    }

    .typing-practice-card
    .lesson-focus-meta {
        grid-column: 1 / -1;
        grid-row: 2;
        gap: 7px;
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        scrollbar-width: none;
    }

    .typing-practice-card
    .lesson-focus-meta::-webkit-scrollbar {
        display: none;
    }

    .typing-practice-card
    .lesson-focus-meta > span {
        flex: 0 0 auto;
        padding: 7px 9px;
    }

    .typing-practice-card
    .lesson-focus-progress {
        min-width: 118px !important;
    }

    .typing-practice-card
    .lesson-tips-panel {
        top: calc(100% - 3px);
        right: 10px;
        left: 10px;
        width: auto;
    }

    .typing-practice-card
    .practice-toolbar {
        grid-template-columns:
            minmax(0, 1fr)
            auto;
        min-height: 56px;
        padding: 10px 12px !important;
    }

    .typing-practice-card
    .practice-toolbar .time-left {
        justify-self: end;
    }

    #lessonText {
        --lesson-visible-lines: 2;
        --lesson-exact-line-height: 1.62em;
        --lesson-vertical-padding: 8px;

        height:
            calc(
                var(--lesson-visible-lines)
                * var(--lesson-exact-line-height)
                + 2
                * var(--lesson-vertical-padding)
            ) !important;

        min-height:
            calc(
                var(--lesson-visible-lines)
                * var(--lesson-exact-line-height)
                + 2
                * var(--lesson-vertical-padding)
            ) !important;

        max-height:
            calc(
                var(--lesson-visible-lines)
                * var(--lesson-exact-line-height)
                + 2
                * var(--lesson-vertical-padding)
            ) !important;

        padding:
            var(--lesson-vertical-padding)
            14px !important;
    }
}

@media (max-width: 430px) {
    .typing-practice-card
    .lesson-focus-icon {
        display: none;
    }

    .typing-practice-card
    .lesson-focus-title h2 {
        font-size: 1rem;
    }
}


/* ==========================================================
   STABLE NON-SCROLLING LESSON PAGES v17.0.16
========================================================== */

/*
 * The renderer now displays a fixed block of three desktop lines or two
 * mobile lines. It replaces the complete block only after it is finished.
 * No smooth scrolling, scroll positioning, or per-key movement is used.
 */
#lessonText {
    scroll-behavior: auto !important;
    overscroll-behavior: none !important;
    overflow: hidden !important;
    overflow-anchor: none !important;
}

#lessonText,
#lessonText .lesson-character {
    transform: none !important;
}

/*
 * Current-character pulse may change only the glow. It must never translate,
 * resize, or shift the surrounding text.
 */
#lessonText .current-character {
    translate: none !important;
}


/* ==========================================================
   ZERO-REFLOW CHARACTER METRICS v17.0.17
========================================================== */

/*
 * The highlighted character previously inherited metric-changing styles
 * such as padding, border, font weight, or transforms. Near a line ending,
 * that temporary width change could move one character to another line,
 * making the third row appear to vibrate.
 *
 * Every character state now uses exactly the same box dimensions.
 */
#lessonText .lesson-character,
#lessonText .typed-character,
#lessonText .future-character,
#lessonText .wrong-character,
#lessonText .current-character {
    display: inline-block !important;
    position: relative !important;

    box-sizing: border-box !important;

    width: auto !important;
    min-width: 0 !important;
    max-width: none !important;

    margin: 0 !important;
    padding: 0 !important;

    border: 0 !important;
    outline: 0 !important;

    font-family: inherit !important;
    font-size: inherit !important;
    font-style: inherit !important;
    font-weight: inherit !important;

    line-height: inherit !important;
    letter-spacing: inherit !important;
    word-spacing: inherit !important;

    vertical-align: baseline !important;

    transform: none !important;
    translate: none !important;
    scale: none !important;

    animation: none !important;
}

/*
 * Background and shadow do not affect width or line wrapping. The current
 * character remains clearly visible without changing text geometry.
 */
#lessonText .current-character {
    color: #ffffff !important;
    background: #2878ff !important;
    border-radius: .16em !important;

    box-shadow:
        0 0 0 .08em
        rgba(40, 120, 255, .30) !important;
}

#lessonText .wrong-character {
    border-radius: .12em !important;
}

/*
 * Spaces use a non-breaking-space glyph and therefore keep their normal
 * monospace width. Highlighting a space cannot enlarge the line.
 */
#lessonText .lesson-character {
    white-space: pre !important;
}