.solver-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.acronym-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    padding: 2.25rem 2rem;
    box-shadow: var(--shadow-sm);
}

.acronym-card:hover {
    box-shadow: var(--shadow-md);
}

.mode-toggle {
    display: flex;
    justify-content: center;
}

.mode-toggle .btn-group {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-radius: var(--radius-pill);
    overflow: hidden;
}

.mode-toggle .btn-outline-primary {
    border: none;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
}

.mode-toggle .btn-check:checked + .btn-outline-primary {
    background: var(--accent-primary);
    color: white;
}

.letters-hero-input {
    background: white;
    border-radius: 999px;
    padding: 0.75rem 1.25rem;
    border: 1px solid rgba(148, 163, 184, 0.6);
    box-shadow: 0 4px 12px rgba(15,23,42,0.06);
}

.letters-hero-input input {
    font-size: 1.1rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.acronym-textarea {
    border-radius: var(--radius-md);
    border: 1px solid rgba(148, 163, 184, 0.6);
    padding: 1rem;
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
}

.acronym-textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.results-area {
    max-width: 900px;
    margin: 0 auto;
}

.results-card {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 1.4rem;
}

.acronym-result {
    padding: 1.25rem;
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    margin-bottom: 1rem;
    transition: all 0.2s;
}

.acronym-result:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

.acronym-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.acronym-letters {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--accent-primary);
    text-transform: uppercase;
}

.acronym-arrow {
    color: var(--text-muted);
    font-size: 1.2rem;
}

.acronym-words {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.acronym-word {
    padding: 0.4rem 0.8rem;
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: var(--radius-pill);
    font-weight: 500;
    color: #0369a1;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: capitalize;
}

.acronym-word:hover {
    background: #e0f2fe;
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.create-result {
    padding: 1.5rem;
    text-align: center;
}

.create-acronym {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--accent-primary);
    text-transform: uppercase;
    margin: 1rem 0;
    padding: 1rem;
    background: #f0f9ff;
    border-radius: var(--radius-md);
    border: 2px solid #bae6fd;
}

.create-words {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-top: 1rem;
}

/* Toast Styles */
.toast-success {
    border-left: 4px solid #10b981;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

.toast-warning {
    border-left: 4px solid #f59e0b;
}

.toast-info {
    border-left: 4px solid var(--accent-primary);
}

@media (max-width: 767.98px) {
    .acronym-card {
        padding: 1.75rem 1.25rem;
    }
    .mode-toggle .btn-outline-primary {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    .acronym-letters {
        font-size: 1.2rem;
    }
    .acronym-words {
        gap: 0.4rem;
    }
    .acronym-word {
        font-size: 0.9rem;
        padding: 0.3rem 0.6rem;
    }
    .create-acronym {
        font-size: 1.5rem;
    }
}