:root {
    /* Design Tokens */
    --color-primary: #2563EB;     /* Learning Blue */
    --color-primary-dark: #1d4ed8;
    --color-secondary: #F59E0B;   /* Play Gold */
    --color-accent: #EC4899;      /* Fun Pink */
    --color-accent-dark: #db2777;
    --color-success: #10B981;     /* Correct Green */
    --color-danger: #EF4444;      /* Wrong Red */
    
    --color-bg: #EFF6FF;          /* Soft light blue */
    --color-fg: #0F172A;          /* Dark slate */
    --color-card-bg: #FFFFFF;
    
    --border-dark: #0F172A;
    --border-width: 3px;
    --border-radius-lg: 1.75rem;
    --border-radius-md: 1.25rem;
    --border-radius-sm: 0.75rem;
    
    /* Claymorphic Shadows */
    --clay-shadow-card: 0 10px 0px 0px var(--border-dark), 
                         inset 0 -8px 0px 0px rgba(15, 23, 42, 0.08), 
                         inset 0 8px 0px 0px rgba(255, 255, 255, 0.6);
                         
    --clay-shadow-btn-primary: 0 6px 0px 0px var(--border-dark), 
                               inset 0 -6px 0px 0px rgba(0, 0, 0, 0.15), 
                               inset 0 6px 0px 0px rgba(255, 255, 255, 0.35);
                               
    --clay-shadow-btn-secondary: 0 6px 0px 0px var(--border-dark), 
                                 inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), 
                                 inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);

    --font-heading: 'Baloo 2', 'Comic Neue', 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Comic Neue', 'Inter', system-ui, -apple-system, sans-serif;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #F8FAFC;
    background-image: 
        radial-gradient(circle at 10% 20%, #E0F2FE 0%, transparent 45%),
        radial-gradient(circle at 90% 15%, #FCE7F3 0%, transparent 45%),
        radial-gradient(circle at 80% 85%, #FEF3C7 0%, transparent 45%),
        radial-gradient(circle at 20% 80%, #F3E8FF 0%, transparent 45%);
    background-attachment: fixed;
    color: var(--color-fg);
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.5;
    min-height: 100dvh;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    width: 100%;
}

.container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

/* Headers & Titles */
.main-title {
    font-family: var(--font-heading);
    font-size: 3.75rem;
    font-weight: 800;
    text-align: center;
    background: linear-gradient(135deg, #2563EB 0%, #EC4899 50%, #F59E0B 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 6px var(--border-dark);
    paint-order: stroke fill;
    text-shadow: 4px 4px 0px var(--border-dark);
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    text-align: center;
    color: var(--color-fg);
    opacity: 0.85;
    margin-bottom: 3rem;
}

/* Screen Layouts */
#home-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 3.5rem;
}

#practice-screen,
#quiz-screen,
#results-screen {
    display: none;
    flex-direction: column;
    flex: 1;
}

#results-screen {
    align-items: center;
    justify-content: center;
}

/* Unit Selector */
.unit-selector-container {
    margin-bottom: 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    max-width: 320px;
}

.unit-select-label {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--color-primary);
    text-shadow: 1px 1px 0px rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
}

.unit-select-dropdown {
    width: 100%;
    font-family: var(--font-body);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-fg);
    padding: 0.85rem 1.5rem;
    background-color: var(--color-card-bg);
    border: var(--border-width) solid var(--border-dark);
    border-radius: var(--border-radius-md);
    box-shadow: var(--clay-shadow-btn-secondary);
    cursor: pointer;
    outline: none;
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-align: center;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg fill='%230F172A' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>");
    background-repeat: no-repeat;
    background-position: left 1rem center;
}

body[dir="rtl"] .unit-select-dropdown {
    background-position: left 1rem center;
    padding-left: 2.5rem;
}

.unit-select-dropdown:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 0px 0px var(--border-dark), 
                inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}

.unit-select-dropdown:active {
    transform: translateY(2px);
    box-shadow: 0 4px 0px 0px var(--border-dark), 
                inset 0 -4px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 4px 0px 0px rgba(255, 255, 255, 0.4);
}

.unit-select-dropdown option {
    background: white;
    color: var(--color-fg);
    font-weight: 700;
}

/* Mode Selection Cards */
.mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 760px;
    margin-top: 1rem;
}

.mode-card {
    background: var(--color-card-bg);
    border: var(--border-width) solid var(--border-dark);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--clay-shadow-card);
    padding: 2.25rem 1.75rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    outline: none;
    text-decoration: none;
    color: inherit;
    width: 100%;
}

.mode-card:nth-child(1) {
    background-color: #EFF6FF; /* soft blue card */
}

.mode-card:nth-child(1):hover {
    background-color: #DBEAFE;
}

.mode-card:nth-child(2) {
    background-color: #FDF2F8; /* soft pink card */
}

.mode-card:nth-child(2):hover {
    background-color: #FCE7F3;
}

.mode-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 0px 0px var(--border-dark), 
                inset 0 -8px 0px 0px rgba(15, 23, 42, 0.08), 
                inset 0 8px 0px 0px rgba(255, 255, 255, 0.6);
}

.mode-card:active {
    transform: translateY(4px);
    box-shadow: 0 6px 0px 0px var(--border-dark), 
                inset 0 -8px 0px 0px rgba(15, 23, 42, 0.08), 
                inset 0 8px 0px 0px rgba(255, 255, 255, 0.6);
}

.mode-icon {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: var(--border-radius-md);
    border: var(--border-width) solid var(--border-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2.25rem;
    box-shadow: 0 4px 0px 0px var(--border-dark), inset 0 4px 0px 0px rgba(255, 255, 255, 0.3);
    transition: transform 0.2s ease;
}

.mode-card:hover .mode-icon {
    transform: rotate(8deg) scale(1.05);
}

.practice-icon {
    background-color: #DBEAFE;
}

.quiz-icon {
    background-color: #FCE7F3;
}

.mode-title {
    font-family: var(--font-heading);
    font-size: 1.65rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--color-fg);
}

.mode-desc {
    color: #475569;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.4;
}

/* Nav & Header Elements */
.screen-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2.5rem;
    gap: 1rem;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius-md);
    background-color: var(--color-card-bg);
    border: var(--border-width) solid var(--border-dark);
    color: var(--color-fg);
    font-weight: 700;
    font-family: var(--font-body);
    font-size: 1.05rem;
    cursor: pointer;
    box-shadow: var(--clay-shadow-btn-secondary);
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    outline: none;
    text-decoration: none;
    touch-action: manipulation;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 0px 0px var(--border-dark), 
                inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}

.nav-btn:active {
    transform: translateY(2px);
    box-shadow: 0 4px 0px 0px var(--border-dark), 
                inset 0 -4px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 4px 0px 0px rgba(255, 255, 255, 0.4);
}

.score-badge {
    background-color: #FEF3C7; /* Soft gold */
    cursor: default;
    box-shadow: 0 6px 0px 0px var(--border-dark), inset 0 4px 0px 0px rgba(255, 255, 255, 0.6);
}

.score-badge:hover {
    transform: none;
    box-shadow: 0 6px 0px 0px var(--border-dark), inset 0 4px 0px 0px rgba(255, 255, 255, 0.6);
}

.score-badge i {
    color: #D97706; /* Golden dark icon */
}

/* Progress bar */
.progress-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.progress-track {
    height: 1.15rem;
    background: #E2E8F0;
    border: var(--border-width) solid var(--border-dark);
    border-radius: var(--border-radius-sm);
    box-shadow: inset 0 3px 0px 0px rgba(0,0,0,0.06);
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-success);
    background-image: linear-gradient(
        45deg, 
        rgba(255,255,255,0.15) 25%, 
        transparent 25%, 
        transparent 50%, 
        rgba(255,255,255,0.15) 50%, 
        rgba(255,255,255,0.15) 75%, 
        transparent 75%, 
        transparent
    );
    background-size: 1rem 1rem;
    border-radius: 4px;
    width: 0%;
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 4px 0px 0px rgba(255,255,255,0.3);
}

.progress-text {
    text-align: center;
    font-size: 0.95rem;
    font-weight: 700;
    color: #475569;
}

/* Claymorphic 3D Card */
.card-stage {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1200px;
    margin: 1.5rem 0;
}

.premium-card-container {
    width: 100%;
    max-width: 520px;
    height: 380px;
    cursor: pointer;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    transform-style: preserve-3d;
    position: relative;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.premium-card-container.flipped {
    transform: rotateY(180deg);
}

.card-side {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    background: #FAF5FF; /* soft lavender front */
    border: var(--border-width) solid var(--border-dark);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--clay-shadow-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem;
    transition: box-shadow 0.3s;
}

.premium-card-container:hover .card-side {
    box-shadow: 0 16px 0px 0px var(--border-dark), 
                inset 0 -8px 0px 0px rgba(15, 23, 42, 0.08), 
                inset 0 8px 0px 0px rgba(255, 255, 255, 0.6);
}

.card-side.back {
    transform: rotateY(180deg);
    background-color: #FFFBEB; /* soft butter yellow back */
}

.difficulty-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--border-dark);
    background-color: #DBEAFE;
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 800;
    font-family: var(--font-heading);
    box-shadow: 2px 2px 0px 0px var(--border-dark);
}

.card-word {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-primary);
    -webkit-text-stroke: 1.5px var(--border-dark);
    text-shadow: 3px 3px 0px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
    text-align: center;
    direction: ltr;
}

.card-example {
    font-size: 1.15rem;
    color: #475569;
    font-weight: 500;
    margin-bottom: 2rem;
    text-align: center;
    max-width: 90%;
    direction: ltr;
    line-height: 1.4;
}

.card-translation {
    font-family: var(--font-heading);
    font-size: 3.25rem;
    font-weight: 800;
    color: var(--color-accent-dark);
    -webkit-text-stroke: 1.5px var(--border-dark);
    text-shadow: 3px 3px 0px rgba(0,0,0,0.1);
    text-align: center;
}

.card-divider {
    width: 80px;
    height: 6px;
    background-color: var(--border-dark);
    border-radius: var(--border-radius-sm);
    margin-top: 1.5rem;
}

.card-footer-hint {
    font-size: 0.9rem;
    font-weight: 700;
    color: #94A3B8;
    position: absolute;
    bottom: 1.5rem;
}

/* speak button */
.speak-btn-main {
    padding: 0.7rem 1.4rem;
    border-radius: var(--border-radius-md);
    background-color: var(--color-accent);
    border: var(--border-width) solid var(--border-dark);
    color: white;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--clay-shadow-btn-primary);
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-bottom: 1.5rem;
    outline: none;
    touch-action: manipulation;
}

.speak-btn-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 0px 0px var(--border-dark), 
                inset 0 -6px 0px 0px rgba(0, 0, 0, 0.15), 
                inset 0 6px 0px 0px rgba(255, 255, 255, 0.35);
}

.speak-btn-main:active {
    transform: translateY(3px);
    box-shadow: 0 3px 0px 0px var(--border-dark), 
                inset 0 -4px 0px 0px rgba(0, 0, 0, 0.15), 
                inset 0 4px 0px 0px rgba(255, 255, 255, 0.35);
}

/* Practice Controllers */
.bottom-controls {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.icon-control-btn {
    width: 4rem;
    height: 4rem;
    border-radius: var(--border-radius-md);
    background-color: var(--color-card-bg);
    border: var(--border-width) solid var(--border-dark);
    color: var(--color-fg);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--clay-shadow-btn-secondary);
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    outline: none;
    touch-action: manipulation;
}

.icon-control-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 9px 0px 0px var(--border-dark), 
                inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}

.icon-control-btn:active {
    transform: translateY(3px);
    box-shadow: 0 3px 0px 0px var(--border-dark), 
                inset 0 -4px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 4px 0px 0px rgba(255, 255, 255, 0.4);
}

/* Quiz Page Layout */
.quiz-header-info {
    text-align: center;
    margin-bottom: 2.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.quiz-header-info .difficulty-badge {
    position: static;
    margin-bottom: 1rem;
    display: inline-block;
}

.quiz-question-word {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-primary);
    -webkit-text-stroke: 1.5px var(--border-dark);
    text-shadow: 3px 3px 0px rgba(0,0,0,0.1);
    margin-bottom: 1.25rem;
    direction: ltr;
}

/* Quiz Option Grid */
.options-grid-premium {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    width: 100%;
    max-width: 650px;
    margin: 0 auto;
}

.option-premium {
    border: var(--border-width) solid var(--border-dark);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    outline: none;
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    min-height: 70px;
    touch-action: manipulation;
}

.option-premium:nth-child(1) {
    background-color: #E0F2FE; /* soft blue */
    color: #0369A1;
    box-shadow: var(--clay-shadow-btn-secondary);
}
.option-premium:nth-child(1):hover:not(:disabled) {
    background-color: #BAE6FD;
    transform: translateY(-3px);
    box-shadow: 0 9px 0px 0px var(--border-dark), inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}
.option-premium:nth-child(2) {
    background-color: #F3E8FF; /* soft purple */
    color: #6D28D9;
    box-shadow: var(--clay-shadow-btn-secondary);
}
.option-premium:nth-child(2):hover:not(:disabled) {
    background-color: #E9D5FF;
    transform: translateY(-3px);
    box-shadow: 0 9px 0px 0px var(--border-dark), inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}
.option-premium:nth-child(3) {
    background-color: #FCE7F3; /* soft pink */
    color: #BE185D;
    box-shadow: var(--clay-shadow-btn-secondary);
}
.option-premium:nth-child(3):hover:not(:disabled) {
    background-color: #FBCFE8;
    transform: translateY(-3px);
    box-shadow: 0 9px 0px 0px var(--border-dark), inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}
.option-premium:nth-child(4) {
    background-color: #FEF3C7; /* soft yellow */
    color: #B45309;
    box-shadow: var(--clay-shadow-btn-secondary);
}
.option-premium:nth-child(4):hover:not(:disabled) {
    background-color: #FDE68A;
    transform: translateY(-3px);
    box-shadow: 0 9px 0px 0px var(--border-dark), inset 0 -6px 0px 0px rgba(0, 0, 0, 0.1), inset 0 6px 0px 0px rgba(255, 255, 255, 0.4);
}

.option-premium:active:not(:disabled) {
    transform: translateY(3px) !important;
    box-shadow: 0 3px 0px 0px var(--border-dark), 
                inset 0 -4px 0px 0px rgba(0, 0, 0, 0.1), 
                inset 0 4px 0px 0px rgba(255, 255, 255, 0.4) !important;
}

.option-premium.correct {
    background-color: #D1FAE5; /* Correct green light */
    color: var(--color-success);
    border-color: var(--border-dark);
    box-shadow: 0 4px 0px 0px var(--border-dark), inset 0 4px 0px 0px rgba(255,255,255,0.6) !important;
    transform: none !important;
}

.option-premium.wrong {
    background-color: #FEE2E2; /* Wrong red light */
    color: var(--color-danger);
    border-color: var(--border-dark);
    box-shadow: 0 4px 0px 0px var(--border-dark), inset 0 4px 0px 0px rgba(255,255,255,0.6) !important;
    animation: shake 0.5s ease-in-out;
    transform: none !important;
}

.option-premium:disabled {
    cursor: not-allowed;
    opacity: 0.85;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

/* CTA Next Button */
.next-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 2.5rem;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius-md);
    background-color: var(--color-accent);
    color: white;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.3rem;
    border: var(--border-width) solid var(--border-dark);
    cursor: pointer;
    box-shadow: var(--clay-shadow-btn-primary);
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    align-self: center;
    outline: none;
    touch-action: manipulation;
}

.next-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 9px 0px 0px var(--border-dark), 
                inset 0 -6px 0px 0px rgba(0, 0, 0, 0.15), 
                inset 0 6px 0px 0px rgba(255, 255, 255, 0.35);
}

.next-button:active {
    transform: translateY(3px);
    box-shadow: 0 3px 0px 0px var(--border-dark), 
                inset 0 -4px 0px 0px rgba(0, 0, 0, 0.15), 
                inset 0 4px 0px 0px rgba(255, 255, 255, 0.35);
}

.animate-bounce {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

/* Results Screen Panel */
.results-card {
    background-color: var(--color-card-bg);
    border: var(--border-width) solid var(--border-dark);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--clay-shadow-card);
    padding: 3.5rem 2rem;
    text-align: center;
    max-width: 500px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.results-emoji-badge {
    width: 5.5rem;
    height: 5.5rem;
    background-color: #FEF3C7;
    border: var(--border-width) solid var(--border-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    font-size: 2.75rem;
    box-shadow: 0 4px 0px 0px var(--border-dark), inset 0 4px 0px 0px rgba(255, 255, 255, 0.6);
}

#results-headline {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--color-fg);
}

.results-score-big {
    font-family: var(--font-heading);
    font-size: 5.5rem;
    font-weight: 800;
    line-height: 1;
    color: var(--color-primary);
    -webkit-text-stroke: 1.5px var(--border-dark);
    text-shadow: 4px 4px 0px rgba(0,0,0,0.15);
    margin-bottom: 0.5rem;
}

.results-percentage {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: #475569;
    margin-bottom: 2.5rem;
}

.results-actions {
    display: flex;
    gap: 1.25rem;
    justify-content: center;
    width: 100%;
    flex-wrap: wrap;
}

.results-actions .next-button {
    margin-top: 0;
}

.nav-btn-large {
    padding: 0.9rem 2.25rem;
    font-size: 1.2rem;
}

/* Footer Section */
footer {
    padding: 3rem 1.5rem;
    border-top: var(--border-width) solid var(--border-dark);
    text-align: center;
    background: #E2E8F0;
    margin-top: auto;
}

footer p {
    color: #475569;
    font-weight: 700;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.footer-link {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: border-color 0.15s;
}

.footer-link:hover {
    border-bottom-color: var(--color-primary);
}

.social-bar {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
}

.premium-social-btn {
    width: 3.25rem;
    height: 3.25rem;
    border-radius: var(--border-radius-md);
    background-color: var(--color-card-bg);
    border: var(--border-width) solid var(--border-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-fg);
    font-size: 1.35rem;
    box-shadow: var(--clay-shadow-btn-secondary);
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
}

.premium-social-btn:hover {
    transform: translateY(-4px);
    color: white;
}

.premium-social-btn:active {
    transform: translateY(2px);
}

.ln:hover {
    background-color: #0077b5;
    box-shadow: 0 6px 0px 0px var(--border-dark);
}

.em:hover {
    background-color: var(--color-primary);
    box-shadow: 0 6px 0px 0px var(--border-dark);
}

.wa:hover {
    background-color: #25d366;
    box-shadow: 0 6px 0px 0px var(--border-dark);
}

/* Confetti particles */
.confetti-piece {
    position: fixed;
    width: 12px;
    height: 12px;
    z-index: 9999;
    pointer-events: none;
    border-radius: 2px;
    border: 1px solid rgba(0,0,0,0.15);
}

@keyframes fall {
    to {
        transform: translateY(105dvh) rotate(540deg);
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }
    
    .main-title {
        font-size: 2.85rem;
        -webkit-text-stroke: 1.5px var(--border-dark);
        text-shadow: 3px 3px 0px var(--border-dark);
    }
    
    .hero-subtitle {
        font-size: 1.15rem;
        margin-bottom: 2rem;
    }
    
    .mode-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .screen-header {
        margin-bottom: 1.75rem;
    }
    
    .progress-container {
        margin: 0;
    }
    
    .premium-card-container {
        height: 320px;
    }
    
    .card-side {
        padding: 1.5rem;
    }
    
    .card-word {
        font-size: 2.65rem;
    }
    
    .card-translation {
        font-size: 2.35rem;
    }
    
    .options-grid-premium {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .option-premium {
        min-height: 55px;
        font-size: 1.15rem;
        padding: 0.85rem;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2.35rem;
    }
    
    .premium-card-container {
        height: 290px;
    }
    
    .card-word {
        font-size: 2.25rem;
    }
    
    .card-translation {
        font-size: 2.05rem;
    }
    
    .difficulty-badge {
        top: 1rem;
        right: 1rem;
    }
}

/* Landscape Mode Adjustments for Mobile devices to prevent clipping */
@media (max-height: 600px) and (orientation: landscape) {
    body {
        font-size: 1rem;
    }
    
    #home-screen {
        padding-top: 1rem;
    }
    
    .main-title {
        font-size: 2rem;
        margin-bottom: 0.25rem;
    }
    
    .hero-subtitle {
        margin-bottom: 1rem;
    }
    
    .mode-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        margin-top: 0.5rem;
    }
    
    .mode-card {
        padding: 1rem;
        flex-direction: row;
        gap: 1rem;
        align-items: center;
        text-align: right;
    }
    
    .mode-icon {
        width: 3rem;
        height: 3rem;
        font-size: 1.5rem;
        margin-bottom: 0;
    }
    
    .premium-card-container {
        height: 220px;
    }
    
    .card-side {
        padding: 1rem;
    }
    
    .card-word {
        font-size: 1.85rem;
        margin-bottom: 0.25rem;
    }
    
    .card-translation {
        font-size: 1.65rem;
    }
    
    .card-example {
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
    }
    
    .speak-btn-main {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }
    
    .options-grid-premium {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .option-premium {
        min-height: 44px;
        padding: 0.5rem;
        font-size: 1rem;
    }
}