:root {
    --primary: #1e293b;
    --primary-light: #334155;
    --secondary: #3b82f6;
    --success: #10b981;
    --success-light: #34d399;
    --success-bg: #ecfdf5;
    --success-border: #86efac;
    --success-text: #047857;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f8fafc;
    --bg-light: #ffffff;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --text: #0f172a;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --shadow: 0 0.0625rem 0.1875rem 0 rgb(0 0 0 / 0.1), 0 0.0625rem 0.125rem -0.0625rem rgb(0 0 0 / 0.1);
    --shadow-lg: 0 0.625rem 0.9375rem -0.1875rem rgb(0 0 0 / 0.1), 0 0.25rem 0.375rem -0.25rem rgb(0 0 0 / 0.1);
    --radius: 0.75rem;
    --radius-sm: 0.5rem;
    --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

    /* Level colors */
    --level-1: #dc2626;
    --level-1-border: #991b1b;
    --level-2: #ea580c;
    --level-2-border: #c2410c;
    --level-3: #ca8a04;
    --level-3-border: #a16207;
    --level-4: #16a34a;
    --level-4-border: #15803d;
    --level-5: #0891b2;
    --level-5-border: #0e7490;
    --level-6: #2563eb;
    --level-6-border: #1d4ed8;
    --level-7: #9333ea;
    --level-7-border: #7c3aed;
    --level-8: #4f46e5;
    --level-8-border: #4338ca;
}

/* Dark mode variables */
[data-theme="dark"] {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --secondary: #60a5fa;
    --success: #34d399;
    --success-light: #6ee7b7;
    --success-bg: #064e3b;
    --success-border: #059669;
    --success-text: #a7f3d0;
    --warning: #fbbf24;
    --danger: #f87171;
    --bg: #0f172a;
    --bg-light: #1e293b;
    --bg-card: #334155;
    --border: #475569;
    --border-light: #64748b;
    --text: #f1f5f9;
    --text-light: #cbd5e1;
    --text-muted: #94a3b8;
    --shadow: 0 0.0625rem 0.1875rem 0 rgb(0 0 0 / 0.3), 0 0.0625rem 0.125rem -0.0625rem rgb(0 0 0 / 0.2);
    --shadow-lg: 0 0.625rem 0.9375rem -0.1875rem rgb(0 0 0 / 0.3), 0 0.25rem 0.375rem -0.25rem rgb(0 0 0 / 0.2);

    /* Level colors remain the same for visibility */
    --level-1: #dc2626;
    --level-1-border: #991b1b;
    --level-2: #ea580c;
    --level-2-border: #c2410c;
    --level-3: #ca8a04;
    --level-3-border: #a16207;
    --level-4: #16a34a;
    --level-4-border: #15803d;
    --level-5: #0891b2;
    --level-5-border: #0e7490;
    --level-6: #2563eb;
    --level-6-border: #1d4ed8;
    --level-7: #9333ea;
    --level-7-border: #7c3aed;
    --level-8: #4f46e5;
    --level-8-border: #4338ca;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text);
    line-height: 1.6;
    font-size: 1rem;
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

header {
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(0.625rem);
    color: white;
    padding: 1.5rem;
    text-align: center;
    border-bottom: 0.0625rem solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-theme="dark"] header {
    background: rgba(15, 23, 42, 0.95);
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

.theme-toggle {
    position: absolute;
    top: 50%;
    right: 1rem;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: 0.0625rem solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(0.625rem);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.05);
}

.theme-toggle svg,
.theme-toggle img {
    width: 1.5rem;
    height: 1.5rem;
    transition: all 0.3s ease;
    color: white;
    filter: brightness(0) invert(1); /* Make SVG icons white */
}

.theme-toggle .sun-icon {
    opacity: 1;
}

.theme-toggle .moon-icon {
    opacity: 0;
    position: absolute;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    opacity: 0;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    opacity: 1;
}

/* SVG icon color adaptation for theme switching */
.calendar-btn img,
img[src*="/assets/icons/"] {
    filter: brightness(0) saturate(100%) invert(13%) sepia(94%) saturate(7151%) hue-rotate(222deg) brightness(90%) contrast(90%);
    transition: filter 0.3s ease;
}

[data-theme="dark"] .calendar-btn img,
[data-theme="dark"] img[src*="/assets/icons/"]:not(.theme-toggle img) {
    filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(7500%) hue-rotate(198deg) brightness(116%) contrast(119%);
}

/* Keep theme toggle icons always white */
.theme-toggle img {
    filter: brightness(0) invert(1) !important;
}

/* Brand-specific icon colors for better recognition */
.calendar-btn.google img {
    filter: brightness(0) saturate(100%) invert(27%) sepia(94%) saturate(7151%) hue-rotate(222deg) brightness(90%) contrast(90%);
}

.calendar-btn.outlook img {
    filter: brightness(0) saturate(100%) invert(27%) sepia(94%) saturate(7151%) hue-rotate(204deg) brightness(90%) contrast(90%);
}

[data-theme="dark"] .calendar-btn.google img,
[data-theme="dark"] .calendar-btn.outlook img {
    filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(7500%) hue-rotate(198deg) brightness(116%) contrast(119%);
}

header h1 {
    margin: 0;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #fff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

main {
    max-width: 75rem;
    margin: 0 auto;
    padding: 2rem 1rem;
    position: relative;
    z-index: 1;
}

/* Modern card styles */
.card {
    background: var(--bg-card);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Hover removed per user request */

.legend {
    background: var(--bg-card);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.legend h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 1.5rem 0;
    color: var(--text);
}

.legend-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr));
    gap: 1rem;
}

@media (max-width: 48rem) {
    .legend-list {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

/* Hover removed per user request */

.legend-color {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    text-shadow: 0 0.0625rem 0.125rem rgba(0, 0, 0, 0.3);
    box-shadow: var(--shadow);
}

section.fase {
    background: var(--bg-card);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition: all 0.2s ease;
}

section.fase:hover {
    box-shadow: var(--shadow-lg);
}

section.fase h2 {
    margin: 0 0 1.5rem 0;
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    font-weight: 600;
    color: var(--text);
    padding-bottom: 0.75rem;
    border-bottom: 0.125rem solid var(--border);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.base-item {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-card);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius-sm);
    transition: none;
}

@media (min-width: 48rem) {
    .base-item {
        flex-direction: row;
        align-items: center;
    }
}

/* Hover removed per user request */

/* Medal styling removed per user request */

.base-title {
    font-weight: 500;
    font-size: 1rem;
    color: var(--text);
    flex: 0 0 auto;
    min-width: 0;
}

@media (min-width: 48rem) {
    .base-title {
        width: 20rem;
        flex: 0 0 20rem;
    }
}

.level-bar {
    flex: 1;
    display: flex;
    height: 2rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background-color: #e2e8f0;
    border: 0.25rem solid #64748b;
    box-shadow: inset 0 0.125rem 0.25rem rgba(0, 0, 0, 0.15), 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
    margin-top: 0.5rem;
    gap: 0.125rem;
}

.level-segment {
    flex: 1;
    background-color: #e2e8f0;
    border: 0.125rem solid #ffffff;
    border-radius: 0.25rem;
    transition: all 0.2s ease;
    position: relative;
    min-width: 1rem;
    min-height: 100%;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.1);
}

.level-segment:hover {
    transform: scale(1.02);
    z-index: 1;
}

/* Force color rendering on all devices */
.level-segment,
.legend-color {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    -webkit-color-adjust: exact;
    forced-color-adjust: none;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Ensure colors are visible in all browsers */
@supports (-webkit-appearance: none) {
    .level-segment {
        -webkit-appearance: none;
        appearance: none;
    }
}

/* Mobile-specific color enforcement */
@media (max-width: 48rem) {
    .level-segment {
        will-change: background-color;
        isolation: isolate;
    }

    .level-segment[class*="level-"] {
        opacity: 1 !important;
        visibility: visible !important;
        filter: saturate(1.2) contrast(1.1) !important;
    }
}

/* Updated level colors with better contrast and mobile visibility */
.level-1 {
    background: var(--level-1) !important;
    border-color: var(--level-1-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-1-border), 0 0.25rem 0.5rem rgba(220, 38, 38, 0.3) !important;
}

.level-2 {
    background: var(--level-2) !important;
    border-color: var(--level-2-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-2-border), 0 0.25rem 0.5rem rgba(234, 88, 12, 0.3) !important;
}

.level-3 {
    background: var(--level-3) !important;
    border-color: var(--level-3-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-3-border), 0 0.25rem 0.5rem rgba(202, 138, 4, 0.3) !important;
}

.level-4 {
    background: var(--level-4) !important;
    border-color: var(--level-4-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-4-border), 0 0.25rem 0.5rem rgba(22, 163, 74, 0.3) !important;
}

.level-5 {
    background: var(--level-5) !important;
    border-color: var(--level-5-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-5-border), 0 0.25rem 0.5rem rgba(8, 145, 178, 0.3) !important;
}

.level-6 {
    background: var(--level-6) !important;
    border-color: var(--level-6-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-6-border), 0 0.25rem 0.5rem rgba(37, 99, 235, 0.3) !important;
}

.level-7 {
    background: var(--level-7) !important;
    border-color: var(--level-7-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-7-border), 0 0.25rem 0.5rem rgba(147, 51, 234, 0.3) !important;
}

.level-8 {
    background: var(--level-8) !important;
    border-color: var(--level-8-border) !important;
    box-shadow: inset 0 0 0 0.125rem var(--level-8-border), 0 0.25rem 0.5rem rgba(79, 70, 229, 0.3) !important;
}

.summary {
    font-size: 1.1rem;
    font-weight: 400;
    background: var(--bg-card);
    border: 0.0625rem solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.summary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0.25rem;
    background: linear-gradient(90deg, var(--secondary), var(--success));
}

.next-lesson {
    font-size: 1.1rem;
    font-weight: 400;
    background: var(--bg-card);
    border: 0.0625rem solid var(--success-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.next-lesson::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0.25rem;
    background: linear-gradient(90deg, var(--success), var(--success-light));
}

.next-lesson h3 {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;

    .next-lesson h3 {
        margin: 0 0 1rem 0;
        font-size: 1.25rem;
        font-weight: 600;
        color: var(--success-text);
        text-align: center;
    }
}

.lesson-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    border-radius: var(--radius-sm);
    color: var(--success-text);
}

/* Hover removed per user request */

.lesson-item:last-child {
    margin-bottom: 0;
}

.lesson-item.today {
    background: var(--success-bg);
    border-color: var(--success);
    font-weight: 600;
    box-shadow: var(--shadow);
}

.lesson-time {
    font-size: 0.9em;
    color: var(--success-text);
    font-weight: 400;
    padding: 0.25rem 0.5rem;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 1.25rem;
    border: 0.0625rem solid var(--success-border);
}

.lesson-time.today {
    font-weight: 600;
    background: rgba(16, 185, 129, 0.2);
    border-color: var(--success);
}

.progress-bar-container {
    margin-top: 1rem;
    height: 1.5rem;
    background: var(--border-light);
    border-radius: 0.75rem;
    overflow: hidden;
    border: 0.0625rem solid var(--border);
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--secondary), var(--success));
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border-radius: 0.75rem;
}

/* Shimmer removed per user request */

.error {
    display: none;
    margin-bottom: 2rem;
    padding: 1.5rem;
    border: 0.0625rem solid var(--danger);
    background: var(--bg-card);
    color: var(--danger);
    border-radius: var(--radius);
    font-weight: 500;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.error::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0.25rem;
    background: var(--danger);
}

.error h2 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.error p {
    margin: 0.5rem 0;
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.6;
}

/* Responsive design improvements */
@media (max-width: 48rem) {
    body {
        font-size: 0.875rem;
    }

    header {
        padding: 1rem;
    }

    .theme-toggle {
        top: 50%;
        right: 0.75rem;
        transform: translateY(-50%);
        width: 2.75rem;
        height: 2.75rem;
    }

    .theme-toggle:hover {
        transform: translateY(-50%) scale(1.05);
    }

    .theme-toggle svg {
        width: 1.25rem;
        height: 1.25rem;
    }

    main {
        padding: 1rem 0.75rem;
    }

    .card,
    .legend,
    section.fase,
    .summary,
    .next-lesson {
        padding: 1rem;
        margin-bottom: 1rem;
        border-radius: var(--radius-sm);
    }

    .base-title {
        font-size: 1rem;
        margin-bottom: 1rem;
        font-weight: 600;
        color: var(--text);
    }

    .level-bar {
        height: 3rem;
        border: 0.375rem solid #475569;
        border-radius: 0.75rem;
        background-color: #f1f5f9;
        box-shadow: inset 0 0.25rem 0.5rem rgba(0, 0, 0, 0.2), 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
        gap: 0.25rem;
        padding: 0.25rem;
    }

    .level-segment {
        min-width: 2rem;
        border: 0.25rem solid #ffffff;
        border-radius: 0.5rem;
        box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.2);
        position: relative;
    }

    .level-segment::after {
        content: '';
        position: absolute;
        top: 0.125rem;
        left: 0.125rem;
        right: 0.125rem;
        bottom: 0.125rem;
        border-radius: 0.25rem;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));
        pointer-events: none;
    }

    .legend-list {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .legend-color {
        width: 3rem;
        height: 3rem;
        font-size: 1.25rem;
        font-weight: 700;
        border: 0.25rem solid #ffffff;
        box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.25);
        border-radius: 0.75rem;
    }

    .lesson-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        text-align: left;
        padding: 1.5rem;
        border: 0.125rem solid rgba(16, 185, 129, 0.4);
        border-radius: 1rem;
        font-size: 1.1rem;
    }

    .lesson-time {
        align-self: flex-end;
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
        font-weight: 600;
        border-radius: 1.5rem;
    }

    /* Force color visibility on mobile */
    .level-1 {
        background-color: var(--level-1) !important;
    }

    .level-2 {
        background-color: var(--level-2) !important;
    }

    .level-3 {
        background-color: var(--level-3) !important;
    }

    .level-4 {
        background-color: var(--level-4) !important;
    }

    .level-5 {
        background-color: var(--level-5) !important;
    }

    .level-6 {
        background-color: var(--level-6) !important;
    }

    .level-7 {
        background-color: var(--level-7) !important;
    }

    .level-8 {
        background-color: var(--level-8) !important;
    }
}

@media (max-width: 30rem) {
    header h1 {
        font-size: 1.5rem;
    }

    .legend-color {
        width: 3.5rem;
        height: 3.5rem;
        font-size: 1.5rem;
        font-weight: 800;
        border: 0.375rem solid #ffffff;
        box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.3);
        border-radius: 1rem;
    }

    .base-item {
        padding: 1.5rem;
        border: 0.125rem solid var(--border);
        border-radius: 1rem;
        background: var(--bg-card);
        box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.1);
    }

    .base-title {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 1.25rem;
        color: var(--text);
    }

    .level-bar {
        height: 4rem;
        border: 0.5rem solid #334155;
        margin-top: 1rem;
        border-radius: 1rem;
        background: #f8fafc;
        box-shadow: inset 0 0.375rem 0.75rem rgba(0, 0, 0, 0.25), 0 0.75rem 1.5rem rgba(0, 0, 0, 0.2);
        gap: 0.25rem;
        padding: 0.25rem;
    }

    .level-segment {
        min-width: 1.5rem;
        border: 0.25rem solid #ffffff;
        border-radius: 0.5rem;
        box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.2);
        position: relative;
    }

    .level-segment::after {
        content: '';
        position: absolute;
        top: 0.125rem;
        left: 0.125rem;
        right: 0.125rem;
        bottom: 0.125rem;
        border-radius: 0.25rem;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.1));
        pointer-events: none;
    }

    /* Medal styling removed per user request */

    /* Additional optimization for very small phones */
    @media (max-width: 20rem) {
        .level-bar {
            gap: 0.125rem;
            padding: 0.125rem;
            height: 3rem;
        }

        .level-segment {
            min-width: 0.8rem;
            border: 0.125rem solid #ffffff;
            flex: 1;
        }

        .level-segment::after {
            top: 0.0625rem;
            left: 0.0625rem;
            right: 0.0625rem;
            bottom: 0.0625rem;
            border-radius: 0.125rem;
        }
    }

    /* Extra strong color enforcement for smallest screens */
    .level-segment.level-1 {
        background: var(--level-1) !important;
        border-color: var(--level-1-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-1-border), 0 0.5rem 1rem rgba(220, 38, 38, 0.4) !important;
    }

    .level-segment.level-2 {
        background: var(--level-2) !important;
        border-color: var(--level-2-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-2-border), 0 0.5rem 1rem rgba(234, 88, 12, 0.4) !important;
    }

    .level-segment.level-3 {
        background: var(--level-3) !important;
        border-color: var(--level-3-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-3-border), 0 0.5rem 1rem rgba(202, 138, 4, 0.4) !important;
    }

    .level-segment.level-4 {
        background: var(--level-4) !important;
        border-color: var(--level-4-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-4-border), 0 0.5rem 1rem rgba(22, 163, 74, 0.4) !important;
    }

    .level-segment.level-5 {
        background: var(--level-5) !important;
        border-color: var(--level-5-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-5-border), 0 0.5rem 1rem rgba(8, 145, 178, 0.4) !important;
    }

    .level-segment.level-6 {
        background: var(--level-6) !important;
        border-color: var(--level-6-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-6-border), 0 0.5rem 1rem rgba(37, 99, 235, 0.4) !important;
    }

    .level-segment.level-7 {
        background: var(--level-7) !important;
        border-color: var(--level-7-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-7-border), 0 0.5rem 1rem rgba(147, 51, 234, 0.4) !important;
    }

    .level-segment.level-8 {
        background: var(--level-8) !important;
        border-color: var(--level-8-border) !important;
        box-shadow: inset 0 0 0 0.25rem var(--level-8-border), 0 0.5rem 1rem rgba(79, 70, 229, 0.4) !important;
    }
}

/* Interactive enhancements */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: ripple-effect 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-effect {
    to {
        transform: scale(2);
        opacity: 0;
    }
}

/* Touch-friendly hover states */
.touch-active {
    transform: scale(0.98) !important;
    opacity: 0.8 !important;
}

/* Enhanced focus styles for accessibility */
.keyboard-navigation .legend-item:focus,
.keyboard-navigation .base-item:focus,
.keyboard-navigation .lesson-item:focus {
    outline: 0.125rem solid var(--secondary);
    outline-offset: 0.125rem;
    border-radius: var(--radius-sm);
}

/* Interactive elements positioning */
.legend-item,
.base-item,
.lesson-item {
    position: relative;
    overflow: hidden;
    outline: none;
}

/* Loading states */
.fase {
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Enhanced tooltips for level segments */
.level-segment {
    position: relative;
}

/* Print styles */
@media print {
    body {
        background: white !important;
        color: black !important;
    }

    header {
        background: #333 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .card,
    .legend,
    section.fase,
    .summary,
    .next-lesson {
        box-shadow: none !important;
        border: 0.0625rem solid #ccc !important;
        break-inside: avoid;
    }
}