/* Buttons */
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: 0.875rem 1.75rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 0.9375rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: white;
    color: #10b981;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

.btn-calculate {
    flex: 1;
    min-width: 180px;
    padding: 1rem 1.5rem;
    background: linear-gradient(to right, #10b981, #14b8a6);
    color: white;
    font-weight: 700;
    font-size: 0.9375rem;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.btn-calculate:hover {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
    transform: scale(1.05);
}

.btn-reset {
    padding: 1rem 1.5rem;
    background: #f3f4f6;
    color: #374151;
    font-weight: 700;
    font-size: 0.9375rem;
    border-radius: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.btn-reset:hover {
    background: #e5e7eb;
}

/* Calculator Section */
.calculator-section {
    padding: 4rem 1rem;
    background: linear-gradient(to bottom right, #ffffff 0%, rgba(16, 185, 129, 0.05) 50%, rgba(20, 184, 166, 0.05) 100%);
}

.calculator-container {
    max-width: 1024px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-title {
    font-size: 2rem;
    color: #1f2937;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 0.9375rem;
    color: #6b7280;
    letter-spacing: 0.01em;
}

.calculator-card {
    background: white;
    border-radius: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    padding: 2rem;
    border: 1px solid rgba(16, 185, 129, 0.1);
}

.calculator-form {
    margin-bottom: 1.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .form-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #374151;
    font-weight: 600;
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

.label-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: white;
}

.label-icon-height {
    background: linear-gradient(to bottom right, #10b981, #14b8a6);
}

.label-icon-weight {
    background: linear-gradient(to bottom right, #14b8a6, #22c55e);
}

.input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1.25rem;
    font-size: 0.9375rem;
    border: 2px solid rgba(16, 185, 129, 0.2);
    border-radius: 0.75rem;
    outline: none;
    transition: all 0.3s ease;
    letter-spacing: 0.01em;
}

.form-input:focus {
    border-color: #10b981;
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.input-unit {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    font-size: 0.875rem;
    font-weight: 500;
}

.form-hint {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: #6b7280;
    letter-spacing: 0.01em;
}

.form-hint i {
    color: #10b981;
}

.form-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding-top: 0.75rem;
}

.calculator-tip {
    background: linear-gradient(to right, rgba(16, 185, 129, 0.05), rgba(20, 184, 166, 0.05));
    border-radius: 1rem;
    padding: 1.25rem;
    border: 1px solid rgba(16, 185, 129, 0.2);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.tip-icon {
    width: 2.25rem;
    height: 2.25rem;
    background: #10b981;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: white;
    flex-shrink: 0;
}

.tip-content {
    flex: 1;
}

.tip-title {
    font-weight: 700;
    color: #1f2937;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    letter-spacing: 0.01em;
}

.tip-text {
    font-size: 0.75rem;
    color: #374151;
    line-height: 1.6;
    letter-spacing: 0.01em;
}